gsd-2021-33193
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
A crafted method sent through HTTP/2 will bypass validation and be forwarded by mod_proxy, which can lead to request splitting or cache poisoning. This issue affects Apache HTTP Server 2.4.17 to 2.4.48.
Aliases
Aliases
CVE-2021-33193


To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-33193",
    "description": "A crafted method sent through HTTP/2 will bypass validation and be forwarded by mod_proxy, which can lead to request splitting or cache poisoning. This issue affects Apache HTTP Server 2.4.17 to 2.4.48.",
    "id": "GSD-2021-33193",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-33193.html",
      "https://ubuntu.com/security/CVE-2021-33193",
      "https://advisories.mageia.org/CVE-2021-33193.html",
      "https://security.archlinux.org/CVE-2021-33193",
      "https://alas.aws.amazon.com/cve/html/CVE-2021-33193.html",
      "https://linux.oracle.com/cve/CVE-2021-33193.html",
      "https://access.redhat.com/errata/RHSA-2022:1915",
      "https://access.redhat.com/errata/RHSA-2022:6753",
      "https://access.redhat.com/errata/RHSA-2022:7143",
      "https://access.redhat.com/errata/RHSA-2022:7144"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-33193"
      ],
      "details": "A crafted method sent through HTTP/2 will bypass validation and be forwarded by mod_proxy, which can lead to request splitting or cache poisoning. This issue affects Apache HTTP Server 2.4.17 to 2.4.48.",
      "id": "GSD-2021-33193",
      "modified": "2023-12-13T01:23:18.945226Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "security@apache.org",
        "ID": "CVE-2021-33193",
        "STATE": "PUBLIC",
        "TITLE": "Request splitting via HTTP/2 method injection and mod_proxy"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Apache HTTP Server",
                    "version": {
                      "version_data": [
                        {
                          "version_name": "Apache HTTP Server 2.4",
                          "version_value": "2.4.17 to 2.4.48"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Apache Software Foundation"
            }
          ]
        }
      },
      "credit": [
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          "lang": "eng",
          "value": "Reported by James Kettle of PortSwigger"
        }
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          }
        ]
      },
      "generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "impact": [
        {
          "other": "moderate"
        }
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      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "Request Splitting"
              }
            ]
          }
        ]
      },
      "references": {
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            "name": "https://portswigger.net/research/http2",
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          },
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            "refsource": "MLIST",
            "url": "https://lists.apache.org/thread.html/re4162adc051c1a0a79e7a24093f3776373e8733abaff57253fef341d@%3Ccvs.httpd.apache.org%3E"
          },
          {
            "name": "[httpd-cvs] 20210916 [httpd-site] branch main updated: Add descriptions for CVE-2021-33193 CVE-2021-36160",
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          },
          {
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            "refsource": "FEDORA",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DSM6UWQICBJ2TU727RENU3HBKEAFLT6T/"
          },
          {
            "name": "FEDORA-2021-f94985afca",
            "refsource": "FEDORA",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EUVJVRJRBW5QVX4OY3NOHZDQ3B3YOTSG/"
          },
          {
            "name": "20211124 Multiple Vulnerabilities in Apache HTTP Server Affecting Cisco Products: November 2021",
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          },
          {
            "name": "https://www.oracle.com/security-alerts/cpujan2022.html",
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          },
          {
            "name": "https://security.netapp.com/advisory/ntap-20210917-0004/",
            "refsource": "CONFIRM",
            "url": "https://security.netapp.com/advisory/ntap-20210917-0004/"
          },
          {
            "name": "https://www.tenable.com/security/tns-2021-17",
            "refsource": "CONFIRM",
            "url": "https://www.tenable.com/security/tns-2021-17"
          },
          {
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          },
          {
            "name": "GLSA-202208-20",
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            "url": "https://security.gentoo.org/glsa/202208-20"
          },
          {
            "name": "[debian-lts-announce] 20230303 [SECURITY] [DLA 3351-1] apache2 security update",
            "refsource": "MLIST",
            "url": "https://lists.debian.org/debian-lts-announce/2023/03/msg00002.html"
          }
        ]
      },
      "source": {
        "discovery": "UNKNOWN"
      },
      "timeline": [
        {
          "lang": "eng",
          "time": "2021-05-11",
          "value": "reported"
        },
        {
          "lang": "eng",
          "time": "2021-08-06",
          "value": "public"
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndIncluding": "2.4.48",
                "versionStartIncluding": "2.4.17",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*",
                "cpe_name": [],
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          },
          {
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                "cpe_name": [],
                "versionEndIncluding": "5.19.1",
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              }
            ],
            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*",
                "cpe_name": [],
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              },
              {
                "cpe23Uri": "cpe:2.3:a:oracle:secure_backup:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "18.1.0.1.0",
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            ],
            "operator": "OR"
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          "ID": "CVE-2021-33193"
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            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "NVD-CWE-Other"
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        },
        "references": {
          "reference_data": [
            {
              "name": "https://portswigger.net/research/http2",
              "refsource": "MISC",
              "tags": [
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            },
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              "name": "[httpd-cvs] 20210916 [httpd-site] branch main updated: Add descriptions for CVE-2021-33193 CVE-2021-36160",
              "refsource": "MLIST",
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            },
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              "name": "[httpd-cvs] 20210916 [httpd-site] branch main updated: Revert \"Add descriptions for CVE-2021-33193 CVE-2021-36160\"",
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              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DSM6UWQICBJ2TU727RENU3HBKEAFLT6T/"
            },
            {
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            },
            {
              "name": "20211124 Multiple Vulnerabilities in Apache HTTP Server Affecting Cisco Products: November 2021",
              "refsource": "CISCO",
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                "Third Party Advisory"
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            },
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              "url": "https://www.oracle.com/security-alerts/cpujan2022.html"
            },
            {
              "name": "https://www.oracle.com/security-alerts/cpuapr2022.html",
              "refsource": "MISC",
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                "Third Party Advisory"
              ],
              "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
            },
            {
              "name": "GLSA-202208-20",
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                "Third Party Advisory"
              ],
              "url": "https://security.gentoo.org/glsa/202208-20"
            },
            {
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              "tags": [],
              "url": "https://lists.debian.org/debian-lts-announce/2023/03/msg00002.html"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 5.0,
            "confidentialityImpact": "NONE",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 10.0,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2023-03-03T19:15Z",
      "publishedDate": "2021-08-16T08:15Z"
    }
  }
}


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