gsd-2016-8622
Vulnerability from gsd
Modified
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": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "secalert@redhat.com",
        "ID": "CVE-2016-8622",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "curl",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "7.51.0"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "The Curl Project"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "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."
          }
        ]
      },
      "impact": {
        "cvss": [
          [
            {
              "vectorString": "3.7/CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
              "version": "3.0"
            }
          ],
          [
            {
              "vectorString": "2.6/AV:N/AC:H/Au:N/C:N/I:P/A:N",
              "version": "2.0"
            }
          ]
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-190"
              }
            ]
          },
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-122"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "RHSA-2018:3558",
            "refsource": "REDHAT",
            "url": "https://access.redhat.com/errata/RHSA-2018:3558"
          },
          {
            "name": "https://curl.haxx.se/docs/adv_20161102H.html",
            "refsource": "CONFIRM",
            "url": "https://curl.haxx.se/docs/adv_20161102H.html"
          },
          {
            "name": "https://www.tenable.com/security/tns-2016-21",
            "refsource": "CONFIRM",
            "url": "https://www.tenable.com/security/tns-2016-21"
          },
          {
            "name": "1037192",
            "refsource": "SECTRACK",
            "url": "http://www.securitytracker.com/id/1037192"
          },
          {
            "name": "http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html",
            "refsource": "CONFIRM",
            "url": "http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html"
          },
          {
            "name": "94105",
            "refsource": "BID",
            "url": "http://www.securityfocus.com/bid/94105"
          },
          {
            "name": "RHSA-2018:2486",
            "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"
          },
          {
            "name": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8622",
            "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": [
              {
                "cpe23Uri": "cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "7.51.0",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "secalert@redhat.com",
          "ID": "CVE-2016-8622"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "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."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-787"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://curl.haxx.se/docs/adv_20161102H.html",
              "refsource": "CONFIRM",
              "tags": [
                "Patch",
                "Vendor Advisory"
              ],
              "url": "https://curl.haxx.se/docs/adv_20161102H.html"
            },
            {
              "name": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8622",
              "refsource": "CONFIRM",
              "tags": [
                "Issue Tracking",
                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8622"
            },
            {
              "name": "https://www.tenable.com/security/tns-2016-21",
              "refsource": "CONFIRM",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://www.tenable.com/security/tns-2016-21"
            },
            {
              "name": "GLSA-201701-47",
              "refsource": "GENTOO",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://security.gentoo.org/glsa/201701-47"
            },
            {
              "name": "1037192",
              "refsource": "SECTRACK",
              "tags": [
                "Third Party Advisory",
                "VDB Entry"
              ],
              "url": "http://www.securitytracker.com/id/1037192"
            },
            {
              "name": "94105",
              "refsource": "BID",
              "tags": [
                "Third Party Advisory",
                "VDB Entry"
              ],
              "url": "http://www.securityfocus.com/bid/94105"
            },
            {
              "name": "RHSA-2018:2486",
              "refsource": "REDHAT",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://access.redhat.com/errata/RHSA-2018:2486"
            },
            {
              "name": "http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html",
              "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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