Vulnerability-Lookup

OPENSUSE-SU-2021:0510-1

Vulnerability from csaf_opensuse - Published: 2021-04-04 22:05 - Updated: 2026-09-20 19:23

Summary

Security update for curl

Severity

Moderate

Notes

Title of the patch: Security update for curl

Description of the patch: This update for curl fixes the following issues: - CVE-2021-22890: TLS 1.3 session ticket proxy host mixup (bsc#1183934) - CVE-2021-22876: Automatic referer leaks credentials (bsc#1183933) This update was imported from the SUSE:SLE-15-SP2:Update update project.

Patchnames: openSUSE-2021-510

CVE-2021-22876

6.1 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N

Affected products

Recommended 14 products

Product	Version	Remediation
Unresolved product id: openSUSE Leap 15.2:curl-0:7.66.0-lp152.3.15.1.i586	—	Vendor Fix
Unresolved product id: openSUSE Leap 15.2:curl-0:7.66.0-lp152.3.15.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Leap 15.2:curl-mini-0:7.66.0-lp152.3.15.1.i586	—	Vendor Fix
Unresolved product id: openSUSE Leap 15.2:curl-mini-0:7.66.0-lp152.3.15.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Leap 15.2:libcurl-devel-0:7.66.0-lp152.3.15.1.i586	—	Vendor Fix
Unresolved product id: openSUSE Leap 15.2:libcurl-devel-0:7.66.0-lp152.3.15.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Leap 15.2:libcurl-devel-32bit-0:7.66.0-lp152.3.15.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Leap 15.2:libcurl-mini-devel-0:7.66.0-lp152.3.15.1.i586	—	Vendor Fix
Unresolved product id: openSUSE Leap 15.2:libcurl-mini-devel-0:7.66.0-lp152.3.15.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Leap 15.2:libcurl4-0:7.66.0-lp152.3.15.1.i586	—	Vendor Fix
Unresolved product id: openSUSE Leap 15.2:libcurl4-0:7.66.0-lp152.3.15.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Leap 15.2:libcurl4-32bit-0:7.66.0-lp152.3.15.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Leap 15.2:libcurl4-mini-0:7.66.0-lp152.3.15.1.i586	—	Vendor Fix
Unresolved product id: openSUSE Leap 15.2:libcurl4-mini-0:7.66.0-lp152.3.15.1.x86_64	—	Vendor Fix

Threats

Impact moderate

CVE-2021-22890

3.1 (Low)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

Affected products

Recommended 14 products, the same list as for CVE-2021-22876

Threats

Impact moderate

References

12 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/o…	self
https://lists.opensuse.org/archives/list/security…	self
https://lists.opensuse.org/archives/list/security…	self
https://bugzilla.suse.com/1183933	self
https://bugzilla.suse.com/1183934	self
https://www.suse.com/security/cve/CVE-2021-22876/	self
https://www.suse.com/security/cve/CVE-2021-22890/	self
https://www.suse.com/security/cve/CVE-2021-22876	external
https://bugzilla.suse.com/1183933	external
https://www.suse.com/security/cve/CVE-2021-22890	external
https://bugzilla.suse.com/1183934	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "namespace": "https://www.suse.com/support/security/rating/",
      "text": "moderate"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright 2024 SUSE LLC. All rights reserved.",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "Security update for curl",
        "title": "Title of the patch"
      },
      {
        "category": "description",
        "text": "This update for curl fixes the following issues:\n\n- CVE-2021-22890: TLS 1.3 session ticket proxy host mixup (bsc#1183934)\n- CVE-2021-22876: Automatic referer leaks credentials (bsc#1183933)\n\nThis update was imported from the SUSE:SLE-15-SP2:Update update project.",
        "title": "Description of the patch"
      },
      {
        "category": "details",
        "text": "openSUSE-2021-510",
        "title": "Patchnames"
      },
      {
        "category": "legal_disclaimer",
        "text": "CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).",
        "title": "Terms of use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://www.suse.com/support/security/contact/",
      "name": "SUSE Product Security Team",
      "namespace": "https://www.suse.com/"
    },
    "references": [
      {
        "category": "external",
        "summary": "SUSE ratings",
        "url": "https://www.suse.com/support/security/rating/"
      },
      {
        "category": "self",
        "summary": "URL of this CSAF notice",
        "url": "https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2021_0510-1.json"
      },
      {
        "category": "self",
        "summary": "URL for openSUSE-SU-2021:0510-1",
        "url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/HDAO4Q3JZASM6AK274RF74JN2GJOK5UE/"
      },
      {
        "category": "self",
        "summary": "E-Mail link for openSUSE-SU-2021:0510-1",
        "url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/HDAO4Q3JZASM6AK274RF74JN2GJOK5UE/"
      },
      {
        "category": "self",
        "summary": "SUSE Bug 1183933",
        "url": "https://bugzilla.suse.com/1183933"
      },
      {
        "category": "self",
        "summary": "SUSE Bug 1183934",
        "url": "https://bugzilla.suse.com/1183934"
      },
      {
        "category": "self",
        "summary": "SUSE CVE CVE-2021-22876 page",
        "url": "https://www.suse.com/security/cve/CVE-2021-22876/"
      },
      {
        "category": "self",
        "summary": "SUSE CVE CVE-2021-22890 page",
        "url": "https://www.suse.com/security/cve/CVE-2021-22890/"
      }
    ],
    "title": "Security update for curl",
    "tracking": {
      "current_release_date": "2026-09-20T19:23:15Z",
      "generator": {
        "date": "2021-04-04T22:05:55Z",
        "engine": {
          "name": "cve-database.git:bin/generate-csaf.pl",
          "version": "1"
        }
      },
      "id": "openSUSE-SU-2021:0510-1",
      "initial_release_date": "2021-04-04T22:05:55Z",
      "revision_history": [
        {
          "date": "2021-04-04T22:05:55Z",
          "number": "1",
          "summary": "Current version"
        },
        {
          "date": "2026-09-20T19:23:15Z",
          "number": "2",
          "summary": "unknown changes"
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "curl-0:7.66.0-lp152.3.15.1.i586",
                "product": {
                  "name": "curl-0:7.66.0-lp152.3.15.1.i586",
                  "product_id": "curl-0:7.66.0-lp152.3.15.1.i586",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:a:haxx:curl:7.66.0:*:*:*:*:*:*:*",
                    "purl": "pkg:rpm/suse/curl@7.66.0-lp152.3.15.1?arch=i586\u0026upstream=curl-0:7.66.0-lp152.3.15.1.src.rpm"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "curl-mini-0:7.66.0-lp152.3.15.1.i586",
                "product": {
                  "name": "curl-mini-0:7.66.0-lp152.3.15.1.i586",
                  "product_id": "curl-mini-0:7.66.0-lp152.3.15.1.i586",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:a:haxx:curl:7.66.0:*:*:*:*:*:*:*",
                    "purl": "pkg:rpm/suse/curl-mini@7.66.0-lp152.3.15.1?arch=i586"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "libcurl-devel-0:7.66.0-lp152.3.15.1.i586",
                "product": {
                  "name": "libcurl-devel-0:7.66.0-lp152.3.15.1.i586",
                  "product_id": "libcurl-devel-0:7.66.0-lp152.3.15.1.i586",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:a:haxx:curl:7.66.0:*:*:*:*:*:*:*",
                    "purl": "pkg:rpm/suse/libcurl-devel@7.66.0-lp152.3.15.1?arch=i586\u0026upstream=curl-0:7.66.0-lp152.3.15.1.src.rpm"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "libcurl-mini-devel-0:7.66.0-lp152.3.15.1.i586",
                "product": {
                  "name": "libcurl-mini-devel-0:7.66.0-lp152.3.15.1.i586",
                  "product_id": "libcurl-mini-devel-0:7.66.0-lp152.3.15.1.i586",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/suse/libcurl-mini-devel@7.66.0-lp152.3.15.1?arch=i586"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "libcurl4-0:7.66.0-lp152.3.15.1.i586",
                "product": {
                  "name": "libcurl4-0:7.66.0-lp152.3.15.1.i586",
                  "product_id": "libcurl4-0:7.66.0-lp152.3.15.1.i586",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:a:haxx:curl:7.66.0:*:*:*:*:*:*:*",
                    "purl": "pkg:rpm/suse/libcurl4@7.66.0-lp152.3.15.1?arch=i586\u0026upstream=curl-0:7.66.0-lp152.3.15.1.src.rpm"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "libcurl4-mini-0:7.66.0-lp152.3.15.1.i586",
                "product": {
                  "name": "libcurl4-mini-0:7.66.0-lp152.3.15.1.i586",
                  "product_id": "libcurl4-mini-0:7.66.0-lp152.3.15.1.i586",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/suse/libcurl4-mini@7.66.0-lp152.3.15.1?arch=i586"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "i586"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "curl-0:7.66.0-lp152.3.15.1.x86_64",
                "product": {
                  "name": "curl-0:7.66.0-lp152.3.15.1.x86_64",
                  "product_id": "curl-0:7.66.0-lp152.3.15.1.x86_64",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:a:haxx:curl:7.66.0:*:*:*:*:*:*:*",
                    "purl": "pkg:rpm/suse/curl@7.66.0-lp152.3.15.1?arch=x86_64\u0026upstream=curl-0:7.66.0-lp152.3.15.1.src.rpm"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "curl-mini-0:7.66.0-lp152.3.15.1.x86_64",
                "product": {
                  "name": "curl-mini-0:7.66.0-lp152.3.15.1.x86_64",
                  "product_id": "curl-mini-0:7.66.0-lp152.3.15.1.x86_64",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:a:haxx:curl:7.66.0:*:*:*:*:*:*:*",
                    "purl": "pkg:rpm/suse/curl-mini@7.66.0-lp152.3.15.1?arch=x86_64"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "libcurl-devel-0:7.66.0-lp152.3.15.1.x86_64",
                "product": {
                  "name": "libcurl-devel-0:7.66.0-lp152.3.15.1.x86_64",
                  "product_id": "libcurl-devel-0:7.66.0-lp152.3.15.1.x86_64",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:a:haxx:curl:7.66.0:*:*:*:*:*:*:*",
                    "purl": "pkg:rpm/suse/libcurl-devel@7.66.0-lp152.3.15.1?arch=x86_64\u0026upstream=curl-0:7.66.0-lp152.3.15.1.src.rpm"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "libcurl-devel-32bit-0:7.66.0-lp152.3.15.1.x86_64",
                "product": {
                  "name": "libcurl-devel-32bit-0:7.66.0-lp152.3.15.1.x86_64",
                  "product_id": "libcurl-devel-32bit-0:7.66.0-lp152.3.15.1.x86_64",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:a:haxx:curl:7.66.0:*:*:*:*:*:*:*",
                    "purl": "pkg:rpm/suse/libcurl-devel-32bit@7.66.0-lp152.3.15.1?arch=x86_64\u0026upstream=curl-0:7.66.0-lp152.3.15.1.src.rpm"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "libcurl-mini-devel-0:7.66.0-lp152.3.15.1.x86_64",
                "product": {
                  "name": "libcurl-mini-devel-0:7.66.0-lp152.3.15.1.x86_64",
                  "product_id": "libcurl-mini-devel-0:7.66.0-lp152.3.15.1.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/suse/libcurl-mini-devel@7.66.0-lp152.3.15.1?arch=x86_64"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "libcurl4-0:7.66.0-lp152.3.15.1.x86_64",
                "product": {
                  "name": "libcurl4-0:7.66.0-lp152.3.15.1.x86_64",
                  "product_id": "libcurl4-0:7.66.0-lp152.3.15.1.x86_64",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:a:haxx:curl:7.66.0:*:*:*:*:*:*:*",
                    "purl": "pkg:rpm/suse/libcurl4@7.66.0-lp152.3.15.1?arch=x86_64\u0026upstream=curl-0:7.66.0-lp152.3.15.1.src.rpm"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "libcurl4-32bit-0:7.66.0-lp152.3.15.1.x86_64",
                "product": {
                  "name": "libcurl4-32bit-0:7.66.0-lp152.3.15.1.x86_64",
                  "product_id": "libcurl4-32bit-0:7.66.0-lp152.3.15.1.x86_64",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:a:haxx:curl:7.66.0:*:*:*:*:*:*:*",
                    "purl": "pkg:rpm/suse/libcurl4-32bit@7.66.0-lp152.3.15.1?arch=x86_64\u0026upstream=curl-0:7.66.0-lp152.3.15.1.src.rpm"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "libcurl4-mini-0:7.66.0-lp152.3.15.1.x86_64",
                "product": {
                  "name": "libcurl4-mini-0:7.66.0-lp152.3.15.1.x86_64",
                  "product_id": "libcurl4-mini-0:7.66.0-lp152.3.15.1.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/suse/libcurl4-mini@7.66.0-lp152.3.15.1?arch=x86_64"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "x86_64"
          },
          {
            "branches": [
              {
                "category": "product_name",
                "name": "openSUSE Leap 15.2",
                "product": {
                  "name": "openSUSE Leap 15.2",
                  "product_id": "openSUSE Leap 15.2",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:opensuse:leap:15.2"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "SUSE Linux Enterprise"
          }
        ],
        "category": "vendor",
        "name": "SUSE"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "curl-0:7.66.0-lp152.3.15.1.i586 as component of openSUSE Leap 15.2",
          "product_id": "openSUSE Leap 15.2:curl-0:7.66.0-lp152.3.15.1.i586"
        },
        "product_reference": "curl-0:7.66.0-lp152.3.15.1.i586",
        "relates_to_product_reference": "openSUSE Leap 15.2"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "curl-0:7.66.0-lp152.3.15.1.x86_64 as component of openSUSE Leap 15.2",
          "product_id": "openSUSE Leap 15.2:curl-0:7.66.0-lp152.3.15.1.x86_64"
        },
        "product_reference": "curl-0:7.66.0-lp152.3.15.1.x86_64",
        "relates_to_product_reference": "openSUSE Leap 15.2"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "curl-mini-0:7.66.0-lp152.3.15.1.i586 as component of openSUSE Leap 15.2",
          "product_id": "openSUSE Leap 15.2:curl-mini-0:7.66.0-lp152.3.15.1.i586"
        },
        "product_reference": "curl-mini-0:7.66.0-lp152.3.15.1.i586",
        "relates_to_product_reference": "openSUSE Leap 15.2"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "curl-mini-0:7.66.0-lp152.3.15.1.x86_64 as component of openSUSE Leap 15.2",
          "product_id": "openSUSE Leap 15.2:curl-mini-0:7.66.0-lp152.3.15.1.x86_64"
        },
        "product_reference": "curl-mini-0:7.66.0-lp152.3.15.1.x86_64",
        "relates_to_product_reference": "openSUSE Leap 15.2"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libcurl-devel-0:7.66.0-lp152.3.15.1.i586 as component of openSUSE Leap 15.2",
          "product_id": "openSUSE Leap 15.2:libcurl-devel-0:7.66.0-lp152.3.15.1.i586"
        },
        "product_reference": "libcurl-devel-0:7.66.0-lp152.3.15.1.i586",
        "relates_to_product_reference": "openSUSE Leap 15.2"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libcurl-devel-0:7.66.0-lp152.3.15.1.x86_64 as component of openSUSE Leap 15.2",
          "product_id": "openSUSE Leap 15.2:libcurl-devel-0:7.66.0-lp152.3.15.1.x86_64"
        },
        "product_reference": "libcurl-devel-0:7.66.0-lp152.3.15.1.x86_64",
        "relates_to_product_reference": "openSUSE Leap 15.2"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libcurl-devel-32bit-0:7.66.0-lp152.3.15.1.x86_64 as component of openSUSE Leap 15.2",
          "product_id": "openSUSE Leap 15.2:libcurl-devel-32bit-0:7.66.0-lp152.3.15.1.x86_64"
        },
        "product_reference": "libcurl-devel-32bit-0:7.66.0-lp152.3.15.1.x86_64",
        "relates_to_product_reference": "openSUSE Leap 15.2"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libcurl-mini-devel-0:7.66.0-lp152.3.15.1.i586 as component of openSUSE Leap 15.2",
          "product_id": "openSUSE Leap 15.2:libcurl-mini-devel-0:7.66.0-lp152.3.15.1.i586"
        },
        "product_reference": "libcurl-mini-devel-0:7.66.0-lp152.3.15.1.i586",
        "relates_to_product_reference": "openSUSE Leap 15.2"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libcurl-mini-devel-0:7.66.0-lp152.3.15.1.x86_64 as component of openSUSE Leap 15.2",
          "product_id": "openSUSE Leap 15.2:libcurl-mini-devel-0:7.66.0-lp152.3.15.1.x86_64"
        },
        "product_reference": "libcurl-mini-devel-0:7.66.0-lp152.3.15.1.x86_64",
        "relates_to_product_reference": "openSUSE Leap 15.2"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libcurl4-0:7.66.0-lp152.3.15.1.i586 as component of openSUSE Leap 15.2",
          "product_id": "openSUSE Leap 15.2:libcurl4-0:7.66.0-lp152.3.15.1.i586"
        },
        "product_reference": "libcurl4-0:7.66.0-lp152.3.15.1.i586",
        "relates_to_product_reference": "openSUSE Leap 15.2"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libcurl4-0:7.66.0-lp152.3.15.1.x86_64 as component of openSUSE Leap 15.2",
          "product_id": "openSUSE Leap 15.2:libcurl4-0:7.66.0-lp152.3.15.1.x86_64"
        },
        "product_reference": "libcurl4-0:7.66.0-lp152.3.15.1.x86_64",
        "relates_to_product_reference": "openSUSE Leap 15.2"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libcurl4-32bit-0:7.66.0-lp152.3.15.1.x86_64 as component of openSUSE Leap 15.2",
          "product_id": "openSUSE Leap 15.2:libcurl4-32bit-0:7.66.0-lp152.3.15.1.x86_64"
        },
        "product_reference": "libcurl4-32bit-0:7.66.0-lp152.3.15.1.x86_64",
        "relates_to_product_reference": "openSUSE Leap 15.2"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libcurl4-mini-0:7.66.0-lp152.3.15.1.i586 as component of openSUSE Leap 15.2",
          "product_id": "openSUSE Leap 15.2:libcurl4-mini-0:7.66.0-lp152.3.15.1.i586"
        },
        "product_reference": "libcurl4-mini-0:7.66.0-lp152.3.15.1.i586",
        "relates_to_product_reference": "openSUSE Leap 15.2"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libcurl4-mini-0:7.66.0-lp152.3.15.1.x86_64 as component of openSUSE Leap 15.2",
          "product_id": "openSUSE Leap 15.2:libcurl4-mini-0:7.66.0-lp152.3.15.1.x86_64"
        },
        "product_reference": "libcurl4-mini-0:7.66.0-lp152.3.15.1.x86_64",
        "relates_to_product_reference": "openSUSE Leap 15.2"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-22876",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2021-22876"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "curl 7.1.1 to and including 7.75.0 is vulnerable to an \"Exposure of Private Personal Information to an Unauthorized Actor\" by leaking credentials in the HTTP Referer: header. libcurl does not strip off user credentials from the URL when automatically populating the Referer: HTTP request header field in outgoing HTTP requests, and therefore risks leaking sensitive data to the server that is the target of the second HTTP request.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "openSUSE Leap 15.2:curl-0:7.66.0-lp152.3.15.1.i586",
          "openSUSE Leap 15.2:curl-0:7.66.0-lp152.3.15.1.x86_64",
          "openSUSE Leap 15.2:curl-mini-0:7.66.0-lp152.3.15.1.i586",
          "openSUSE Leap 15.2:curl-mini-0:7.66.0-lp152.3.15.1.x86_64",
          "openSUSE Leap 15.2:libcurl-devel-0:7.66.0-lp152.3.15.1.i586",
          "openSUSE Leap 15.2:libcurl-devel-0:7.66.0-lp152.3.15.1.x86_64",
          "openSUSE Leap 15.2:libcurl-devel-32bit-0:7.66.0-lp152.3.15.1.x86_64",
          "openSUSE Leap 15.2:libcurl-mini-devel-0:7.66.0-lp152.3.15.1.i586",
          "openSUSE Leap 15.2:libcurl-mini-devel-0:7.66.0-lp152.3.15.1.x86_64",
          "openSUSE Leap 15.2:libcurl4-0:7.66.0-lp152.3.15.1.i586",
          "openSUSE Leap 15.2:libcurl4-0:7.66.0-lp152.3.15.1.x86_64",
          "openSUSE Leap 15.2:libcurl4-32bit-0:7.66.0-lp152.3.15.1.x86_64",
          "openSUSE Leap 15.2:libcurl4-mini-0:7.66.0-lp152.3.15.1.i586",
          "openSUSE Leap 15.2:libcurl4-mini-0:7.66.0-lp152.3.15.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2021-22876",
          "url": "https://www.suse.com/security/cve/CVE-2021-22876"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1183933 for CVE-2021-22876",
          "url": "https://bugzilla.suse.com/1183933"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "openSUSE Leap 15.2:curl-0:7.66.0-lp152.3.15.1.i586",
            "openSUSE Leap 15.2:curl-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:curl-mini-0:7.66.0-lp152.3.15.1.i586",
            "openSUSE Leap 15.2:curl-mini-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:libcurl-devel-0:7.66.0-lp152.3.15.1.i586",
            "openSUSE Leap 15.2:libcurl-devel-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:libcurl-devel-32bit-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:libcurl-mini-devel-0:7.66.0-lp152.3.15.1.i586",
            "openSUSE Leap 15.2:libcurl-mini-devel-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:libcurl4-0:7.66.0-lp152.3.15.1.i586",
            "openSUSE Leap 15.2:libcurl4-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:libcurl4-32bit-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:libcurl4-mini-0:7.66.0-lp152.3.15.1.i586",
            "openSUSE Leap 15.2:libcurl4-mini-0:7.66.0-lp152.3.15.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "openSUSE Leap 15.2:curl-0:7.66.0-lp152.3.15.1.i586",
            "openSUSE Leap 15.2:curl-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:curl-mini-0:7.66.0-lp152.3.15.1.i586",
            "openSUSE Leap 15.2:curl-mini-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:libcurl-devel-0:7.66.0-lp152.3.15.1.i586",
            "openSUSE Leap 15.2:libcurl-devel-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:libcurl-devel-32bit-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:libcurl-mini-devel-0:7.66.0-lp152.3.15.1.i586",
            "openSUSE Leap 15.2:libcurl-mini-devel-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:libcurl4-0:7.66.0-lp152.3.15.1.i586",
            "openSUSE Leap 15.2:libcurl4-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:libcurl4-32bit-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:libcurl4-mini-0:7.66.0-lp152.3.15.1.i586",
            "openSUSE Leap 15.2:libcurl4-mini-0:7.66.0-lp152.3.15.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2021-04-04T22:05:55Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2021-22876"
    },
    {
      "cve": "CVE-2021-22890",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2021-22890"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "curl 7.63.0 to and including 7.75.0 includes vulnerability that allows a malicious HTTPS proxy to MITM a connection due to bad handling of TLS 1.3 session tickets. When using a HTTPS proxy and TLS 1.3, libcurl can confuse session tickets arriving from the HTTPS proxy but work as if they arrived from the remote server and then wrongly \"short-cut\" the host handshake. When confusing the tickets, a HTTPS proxy can trick libcurl to use the wrong session ticket resume for the host and thereby circumvent the server TLS certificate check and make a MITM attack to be possible to perform unnoticed. Note that such a malicious HTTPS proxy needs to provide a certificate that curl will accept for the MITMed server for an attack to work - unless curl has been told to ignore the server certificate check.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "openSUSE Leap 15.2:curl-0:7.66.0-lp152.3.15.1.i586",
          "openSUSE Leap 15.2:curl-0:7.66.0-lp152.3.15.1.x86_64",
          "openSUSE Leap 15.2:curl-mini-0:7.66.0-lp152.3.15.1.i586",
          "openSUSE Leap 15.2:curl-mini-0:7.66.0-lp152.3.15.1.x86_64",
          "openSUSE Leap 15.2:libcurl-devel-0:7.66.0-lp152.3.15.1.i586",
          "openSUSE Leap 15.2:libcurl-devel-0:7.66.0-lp152.3.15.1.x86_64",
          "openSUSE Leap 15.2:libcurl-devel-32bit-0:7.66.0-lp152.3.15.1.x86_64",
          "openSUSE Leap 15.2:libcurl-mini-devel-0:7.66.0-lp152.3.15.1.i586",
          "openSUSE Leap 15.2:libcurl-mini-devel-0:7.66.0-lp152.3.15.1.x86_64",
          "openSUSE Leap 15.2:libcurl4-0:7.66.0-lp152.3.15.1.i586",
          "openSUSE Leap 15.2:libcurl4-0:7.66.0-lp152.3.15.1.x86_64",
          "openSUSE Leap 15.2:libcurl4-32bit-0:7.66.0-lp152.3.15.1.x86_64",
          "openSUSE Leap 15.2:libcurl4-mini-0:7.66.0-lp152.3.15.1.i586",
          "openSUSE Leap 15.2:libcurl4-mini-0:7.66.0-lp152.3.15.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2021-22890",
          "url": "https://www.suse.com/security/cve/CVE-2021-22890"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1183934 for CVE-2021-22890",
          "url": "https://bugzilla.suse.com/1183934"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "openSUSE Leap 15.2:curl-0:7.66.0-lp152.3.15.1.i586",
            "openSUSE Leap 15.2:curl-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:curl-mini-0:7.66.0-lp152.3.15.1.i586",
            "openSUSE Leap 15.2:curl-mini-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:libcurl-devel-0:7.66.0-lp152.3.15.1.i586",
            "openSUSE Leap 15.2:libcurl-devel-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:libcurl-devel-32bit-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:libcurl-mini-devel-0:7.66.0-lp152.3.15.1.i586",
            "openSUSE Leap 15.2:libcurl-mini-devel-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:libcurl4-0:7.66.0-lp152.3.15.1.i586",
            "openSUSE Leap 15.2:libcurl4-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:libcurl4-32bit-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:libcurl4-mini-0:7.66.0-lp152.3.15.1.i586",
            "openSUSE Leap 15.2:libcurl4-mini-0:7.66.0-lp152.3.15.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 3.1,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "openSUSE Leap 15.2:curl-0:7.66.0-lp152.3.15.1.i586",
            "openSUSE Leap 15.2:curl-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:curl-mini-0:7.66.0-lp152.3.15.1.i586",
            "openSUSE Leap 15.2:curl-mini-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:libcurl-devel-0:7.66.0-lp152.3.15.1.i586",
            "openSUSE Leap 15.2:libcurl-devel-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:libcurl-devel-32bit-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:libcurl-mini-devel-0:7.66.0-lp152.3.15.1.i586",
            "openSUSE Leap 15.2:libcurl-mini-devel-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:libcurl4-0:7.66.0-lp152.3.15.1.i586",
            "openSUSE Leap 15.2:libcurl4-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:libcurl4-32bit-0:7.66.0-lp152.3.15.1.x86_64",
            "openSUSE Leap 15.2:libcurl4-mini-0:7.66.0-lp152.3.15.1.i586",
            "openSUSE Leap 15.2:libcurl4-mini-0:7.66.0-lp152.3.15.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2021-04-04T22:05:55Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2021-22890"
    }
  ]
}

CVE-2021-22876 (GCVE-0-2021-22876)

Vulnerability from cvelistv5 – Published: 2021-04-01 17:45 – Updated: 2025-06-09 14:54

Summary

curl 7.1.1 to and including 7.75.0 is vulnerable to an "Exposure of Private Personal Information to an Unauthorized Actor" by leaking credentials in the HTTP Referer: header. libcurl does not strip off user credentials from the URL when automatically populating the Referer: HTTP request header field in outgoing HTTP requests, and therefore risks leaking sensitive data to the server that is the target of the second HTTP request.

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-06-09 14:54 UTC

CWE

CWE-359 - Privacy Violation (CWE-359)

Assigner

hackerone CNA under the mitre root

CNA scorecard D 59/100 over 187 records in the last 180 days details

References

10 references

URL	Tags
https://hackerone.com/reports/1101882	x_refsource_MISC
https://curl.se/docs/CVE-2021-22876.html	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST
https://security.gentoo.org/glsa/202105-36	vendor-advisoryx_refsource_GENTOO
https://www.oracle.com//security-alerts/cpujul2021.html	x_refsource_MISC
https://security.netapp.com/advisory/ntap-2021052…	x_refsource_CONFIRM
https://cert-portal.siemens.com/productcert/pdf/s…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
n/a	https://github.com/curl/curl	Affected: 7.1.1 to and including 7.75.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T18:51:07.627Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://hackerone.com/reports/1101882"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://curl.se/docs/CVE-2021-22876.html"
          },
          {
            "name": "FEDORA-2021-cab5c9befb",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITVWPVGLFISU5BJC2BXBRYSDXTXE2YGC/"
          },
          {
            "name": "FEDORA-2021-065371f385",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KQUIOYX2KUU6FIUZVB5WWZ6JHSSYSQWJ/"
          },
          {
            "name": "FEDORA-2021-26a293c72b",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2ZC5BMIOKLBQJSFCHEDN2G2C2SH274BP/"
          },
          {
            "name": "[debian-lts-announce] 20210517 [SECURITY] [DLA 2664-1] curl security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2021/05/msg00019.html"
          },
          {
            "name": "GLSA-202105-36",
            "tags": [
              "vendor-advisory",
              "x_refsource_GENTOO",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202105-36"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.oracle.com//security-alerts/cpujul2021.html"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20210521-0007/"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 5.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2021-22876",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-06-09T14:54:20.546763Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-06-09T14:54:59.891Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "https://github.com/curl/curl",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "7.1.1 to and including 7.75.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "curl 7.1.1 to and including 7.75.0 is vulnerable to an \"Exposure of Private Personal Information to an Unauthorized Actor\" by leaking credentials in the HTTP Referer: header. libcurl does not strip off user credentials from the URL when automatically populating the Referer: HTTP request header field in outgoing HTTP requests, and therefore risks leaking sensitive data to the server that is the target of the second HTTP request."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-359",
              "description": "Privacy Violation (CWE-359)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-03-08T14:06:57.000Z",
        "orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
        "shortName": "hackerone"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://hackerone.com/reports/1101882"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://curl.se/docs/CVE-2021-22876.html"
        },
        {
          "name": "FEDORA-2021-cab5c9befb",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITVWPVGLFISU5BJC2BXBRYSDXTXE2YGC/"
        },
        {
          "name": "FEDORA-2021-065371f385",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KQUIOYX2KUU6FIUZVB5WWZ6JHSSYSQWJ/"
        },
        {
          "name": "FEDORA-2021-26a293c72b",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2ZC5BMIOKLBQJSFCHEDN2G2C2SH274BP/"
        },
        {
          "name": "[debian-lts-announce] 20210517 [SECURITY] [DLA 2664-1] curl security update",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2021/05/msg00019.html"
        },
        {
          "name": "GLSA-202105-36",
          "tags": [
            "vendor-advisory",
            "x_refsource_GENTOO"
          ],
          "url": "https://security.gentoo.org/glsa/202105-36"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.oracle.com//security-alerts/cpujul2021.html"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://security.netapp.com/advisory/ntap-20210521-0007/"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "support@hackerone.com",
          "ID": "CVE-2021-22876",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "https://github.com/curl/curl",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "7.1.1 to and including 7.75.0"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "curl 7.1.1 to and including 7.75.0 is vulnerable to an \"Exposure of Private Personal Information to an Unauthorized Actor\" by leaking credentials in the HTTP Referer: header. libcurl does not strip off user credentials from the URL when automatically populating the Referer: HTTP request header field in outgoing HTTP requests, and therefore risks leaking sensitive data to the server that is the target of the second HTTP request."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "Privacy Violation (CWE-359)"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://hackerone.com/reports/1101882",
              "refsource": "MISC",
              "url": "https://hackerone.com/reports/1101882"
            },
            {
              "name": "https://curl.se/docs/CVE-2021-22876.html",
              "refsource": "MISC",
              "url": "https://curl.se/docs/CVE-2021-22876.html"
            },
            {
              "name": "FEDORA-2021-cab5c9befb",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ITVWPVGLFISU5BJC2BXBRYSDXTXE2YGC/"
            },
            {
              "name": "FEDORA-2021-065371f385",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KQUIOYX2KUU6FIUZVB5WWZ6JHSSYSQWJ/"
            },
            {
              "name": "FEDORA-2021-26a293c72b",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2ZC5BMIOKLBQJSFCHEDN2G2C2SH274BP/"
            },
            {
              "name": "[debian-lts-announce] 20210517 [SECURITY] [DLA 2664-1] curl security update",
              "refsource": "MLIST",
              "url": "https://lists.debian.org/debian-lts-announce/2021/05/msg00019.html"
            },
            {
              "name": "GLSA-202105-36",
              "refsource": "GENTOO",
              "url": "https://security.gentoo.org/glsa/202105-36"
            },
            {
              "name": "https://www.oracle.com//security-alerts/cpujul2021.html",
              "refsource": "MISC",
              "url": "https://www.oracle.com//security-alerts/cpujul2021.html"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20210521-0007/",
              "refsource": "CONFIRM",
              "url": "https://security.netapp.com/advisory/ntap-20210521-0007/"
            },
            {
              "name": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf",
              "refsource": "CONFIRM",
              "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
    "assignerShortName": "hackerone",
    "cveId": "CVE-2021-22876",
    "datePublished": "2021-04-01T17:45:18.000Z",
    "dateReserved": "2021-01-06T00:00:00.000Z",
    "dateUpdated": "2025-06-09T14:54:59.891Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

CVE-2021-22890 (GCVE-0-2021-22890)

Vulnerability from cvelistv5 – Published: 2021-04-01 17:46 – Updated: 2025-06-09 15:11

Summary

curl 7.63.0 to and including 7.75.0 includes vulnerability that allows a malicious HTTPS proxy to MITM a connection due to bad handling of TLS 1.3 session tickets. When using a HTTPS proxy and TLS 1.3, libcurl can confuse session tickets arriving from the HTTPS proxy but work as if they arrived from the remote server and then wrongly "short-cut" the host handshake. When confusing the tickets, a HTTPS proxy can trick libcurl to use the wrong session ticket resume for the host and thereby circumvent the server TLS certificate check and make a MITM attack to be possible to perform unnoticed. Note that such a malicious HTTPS proxy needs to provide a certificate that curl will accept for the MITMed server for an attack to work - unless curl has been told to ignore the server certificate check.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-06-09 15:11 UTC

CWE

CWE-300 - Man-in-the-Middle (CWE-300)

Assigner

hackerone CNA under the mitre root

CNA scorecard D 59/100 over 187 records in the last 180 days details

References

9 references

URL	Tags
https://hackerone.com/reports/1129529	x_refsource_MISC
https://curl.se/docs/CVE-2021-22890.html	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://security.gentoo.org/glsa/202105-36	vendor-advisoryx_refsource_GENTOO
https://www.oracle.com//security-alerts/cpujul2021.html	x_refsource_MISC
https://security.netapp.com/advisory/ntap-2021052…	x_refsource_CONFIRM
https://cert-portal.siemens.com/productcert/pdf/s…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
n/a	https://github.com/curl/curl	Affected: 7.63.0 to and including 7.75.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T18:58:25.687Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://hackerone.com/reports/1129529"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://curl.se/docs/CVE-2021-22890.html"
          },
          {
            "name": "FEDORA-2021-cab5c9befb",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITVWPVGLFISU5BJC2BXBRYSDXTXE2YGC/"
          },
          {
            "name": "FEDORA-2021-065371f385",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KQUIOYX2KUU6FIUZVB5WWZ6JHSSYSQWJ/"
          },
          {
            "name": "FEDORA-2021-26a293c72b",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2ZC5BMIOKLBQJSFCHEDN2G2C2SH274BP/"
          },
          {
            "name": "GLSA-202105-36",
            "tags": [
              "vendor-advisory",
              "x_refsource_GENTOO",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202105-36"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.oracle.com//security-alerts/cpujul2021.html"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20210521-0007/"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 4.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "LOW",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2021-22890",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-06-09T15:11:48.797076Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-06-09T15:11:58.900Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "https://github.com/curl/curl",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "7.63.0 to and including 7.75.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "curl 7.63.0 to and including 7.75.0 includes vulnerability that allows a malicious HTTPS proxy to MITM a connection due to bad handling of TLS 1.3 session tickets. When using a HTTPS proxy and TLS 1.3, libcurl can confuse session tickets arriving from the HTTPS proxy but work as if they arrived from the remote server and then wrongly \"short-cut\" the host handshake. When confusing the tickets, a HTTPS proxy can trick libcurl to use the wrong session ticket resume for the host and thereby circumvent the server TLS certificate check and make a MITM attack to be possible to perform unnoticed. Note that such a malicious HTTPS proxy needs to provide a certificate that curl will accept for the MITMed server for an attack to work - unless curl has been told to ignore the server certificate check."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-300",
              "description": "Man-in-the-Middle (CWE-300)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-03-08T14:08:39.000Z",
        "orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
        "shortName": "hackerone"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://hackerone.com/reports/1129529"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://curl.se/docs/CVE-2021-22890.html"
        },
        {
          "name": "FEDORA-2021-cab5c9befb",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITVWPVGLFISU5BJC2BXBRYSDXTXE2YGC/"
        },
        {
          "name": "FEDORA-2021-065371f385",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KQUIOYX2KUU6FIUZVB5WWZ6JHSSYSQWJ/"
        },
        {
          "name": "FEDORA-2021-26a293c72b",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2ZC5BMIOKLBQJSFCHEDN2G2C2SH274BP/"
        },
        {
          "name": "GLSA-202105-36",
          "tags": [
            "vendor-advisory",
            "x_refsource_GENTOO"
          ],
          "url": "https://security.gentoo.org/glsa/202105-36"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.oracle.com//security-alerts/cpujul2021.html"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://security.netapp.com/advisory/ntap-20210521-0007/"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "support@hackerone.com",
          "ID": "CVE-2021-22890",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "https://github.com/curl/curl",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "7.63.0 to and including 7.75.0"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "curl 7.63.0 to and including 7.75.0 includes vulnerability that allows a malicious HTTPS proxy to MITM a connection due to bad handling of TLS 1.3 session tickets. When using a HTTPS proxy and TLS 1.3, libcurl can confuse session tickets arriving from the HTTPS proxy but work as if they arrived from the remote server and then wrongly \"short-cut\" the host handshake. When confusing the tickets, a HTTPS proxy can trick libcurl to use the wrong session ticket resume for the host and thereby circumvent the server TLS certificate check and make a MITM attack to be possible to perform unnoticed. Note that such a malicious HTTPS proxy needs to provide a certificate that curl will accept for the MITMed server for an attack to work - unless curl has been told to ignore the server certificate check."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "Man-in-the-Middle (CWE-300)"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://hackerone.com/reports/1129529",
              "refsource": "MISC",
              "url": "https://hackerone.com/reports/1129529"
            },
            {
              "name": "https://curl.se/docs/CVE-2021-22890.html",
              "refsource": "MISC",
              "url": "https://curl.se/docs/CVE-2021-22890.html"
            },
            {
              "name": "FEDORA-2021-cab5c9befb",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ITVWPVGLFISU5BJC2BXBRYSDXTXE2YGC/"
            },
            {
              "name": "FEDORA-2021-065371f385",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KQUIOYX2KUU6FIUZVB5WWZ6JHSSYSQWJ/"
            },
            {
              "name": "FEDORA-2021-26a293c72b",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2ZC5BMIOKLBQJSFCHEDN2G2C2SH274BP/"
            },
            {
              "name": "GLSA-202105-36",
              "refsource": "GENTOO",
              "url": "https://security.gentoo.org/glsa/202105-36"
            },
            {
              "name": "https://www.oracle.com//security-alerts/cpujul2021.html",
              "refsource": "MISC",
              "url": "https://www.oracle.com//security-alerts/cpujul2021.html"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20210521-0007/",
              "refsource": "CONFIRM",
              "url": "https://security.netapp.com/advisory/ntap-20210521-0007/"
            },
            {
              "name": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf",
              "refsource": "CONFIRM",
              "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
    "assignerShortName": "hackerone",
    "cveId": "CVE-2021-22890",
    "datePublished": "2021-04-01T17:46:17.000Z",
    "dateReserved": "2021-01-06T00:00:00.000Z",
    "dateUpdated": "2025-06-09T15:11:58.900Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

OPENSUSE-SU-2021:0510-1

CVE-2021-22876 (GCVE-0-2021-22876)

CVE-2021-22890 (GCVE-0-2021-22890)

Tags

Sightings

Nomenclature

Related by attack behaviour