GSD-2016-8622

Vulnerability from gsd - Updated: 2023-12-13 01:21
Details
The URL percent-encoding decode function in libcurl before 7.51.0 is called `curl_easy_unescape`. Internally, even if this function would be made to allocate a unscape destination buffer larger than 2GB, it would return that new length in a signed 32 bit integer variable, thus the length would get either just truncated or both truncated and turned negative. That could then lead to libcurl writing outside of its heap based buffer.
Aliases
Aliases
CVE-2016-8622
To clipboard 

{
  "GSD": {
    "alias": "CVE-2016-8622",
    "description": "The URL percent-encoding decode function in libcurl before 7.51.0 is called `curl_easy_unescape`. Internally, even if this function would be made to allocate a unscape destination buffer larger than 2GB, it would return that new length in a signed 32 bit integer variable, thus the length would get either just truncated or both truncated and turned negative. That could then lead to libcurl writing outside of its heap based buffer.",
    "id": "GSD-2016-8622",
    "references": [
      "https://www.suse.com/security/cve/CVE-2016-8622.html",
      "https://www.debian.org/security/2016/dsa-3705",
      "https://access.redhat.com/errata/RHSA-2018:3558",
      "https://access.redhat.com/errata/RHSA-2018:2486",
      "https://ubuntu.com/security/CVE-2016-8622",
      "https://advisories.mageia.org/CVE-2016-8622.html",
      "https://security.archlinux.org/CVE-2016-8622",
      "https://alas.aws.amazon.com/cve/html/CVE-2016-8622.html",
      "https://linux.oracle.com/cve/CVE-2016-8622.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2016-8622"
      ],
      "details": "The URL percent-encoding decode function in libcurl before 7.51.0 is called `curl_easy_unescape`. Internally, even if this function would be made to allocate a unscape destination buffer larger than 2GB, it would return that new length in a signed 32 bit integer variable, thus the length would get either just truncated or both truncated and turned negative. That could then lead to libcurl writing outside of its heap based buffer.",
      "id": "GSD-2016-8622",
      "modified": "2023-12-13T01:21:22.362298Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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        "ID": "CVE-2016-8622",
        "STATE": "PUBLIC"
      },
      "affects": {
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            {
              "product": {
                "product_data": [
                  {
                    "product_name": "curl",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "7.51.0"
                        }
                      ]
                    }
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              },
              "vendor_name": "The Curl Project"
            }
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          }
        ]
      },
      "impact": {
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            {
              "vectorString": "3.7/CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
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                "value": "CWE-122"
              }
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      },
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            "name": "RHSA-2018:3558",
            "refsource": "REDHAT",
            "url": "https://access.redhat.com/errata/RHSA-2018:3558"
          },
          {
            "name": "https://curl.haxx.se/docs/adv_20161102H.html",
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            "url": "https://curl.haxx.se/docs/adv_20161102H.html"
          },
          {
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            "url": "https://www.tenable.com/security/tns-2016-21"
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          {
            "name": "94105",
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            "url": "http://www.securityfocus.com/bid/94105"
          },
          {
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            "refsource": "REDHAT",
            "url": "https://access.redhat.com/errata/RHSA-2018:2486"
          },
          {
            "name": "GLSA-201701-47",
            "refsource": "GENTOO",
            "url": "https://security.gentoo.org/glsa/201701-47"
          },
          {
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            "refsource": "CONFIRM",
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8622"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
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                "cpe23Uri": "cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "7.51.0",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
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        "description": {
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            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-787"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://curl.haxx.se/docs/adv_20161102H.html",
              "refsource": "CONFIRM",
              "tags": [
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                "Vendor Advisory"
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              "url": "https://curl.haxx.se/docs/adv_20161102H.html"
            },
            {
              "name": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8622",
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              "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8622"
            },
            {
              "name": "https://www.tenable.com/security/tns-2016-21",
              "refsource": "CONFIRM",
              "tags": [
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              "url": "https://www.tenable.com/security/tns-2016-21"
            },
            {
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              "refsource": "GENTOO",
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            },
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              "tags": [
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            },
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              "name": "94105",
              "refsource": "BID",
              "tags": [
                "Third Party Advisory",
                "VDB Entry"
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              "url": "http://www.securityfocus.com/bid/94105"
            },
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              "name": "RHSA-2018:2486",
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              "refsource": "CONFIRM",
              "tags": [],
              "url": "http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html"
            },
            {
              "name": "RHSA-2018:3558",
              "refsource": "REDHAT",
              "tags": [],
              "url": "https://access.redhat.com/errata/RHSA-2018:3558"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 7.5,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 10.0,
          "impactScore": 6.4,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "HIGH",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.0"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 5.9
        }
      },
      "lastModifiedDate": "2018-11-13T11:29Z",
      "publishedDate": "2018-07-31T21:29Z"
    }
  }
}


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  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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