GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2012-3517 (GCVE-0-2012-3517)

Vulnerability from cvelistv5 – Published: 2012-08-26 01:00 – Updated: 2024-08-06 20:05
VLAI
Summary
Use-after-free vulnerability in dns.c in Tor before 0.2.2.38 might allow remote attackers to cause a denial of service (daemon crash) via vectors related to failed DNS requests.
Severity
No CVSS data available.
CWE
  • n/a
Assigner
References
Date Public
2012-08-19 00:00
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-06T20:05:12.774Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "GLSA-201301-03",
            "tags": [
              "vendor-advisory",
              "x_refsource_GENTOO",
              "x_transferred"
            ],
            "url": "http://security.gentoo.org/glsa/glsa-201301-03.xml"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=849949"
          },
          {
            "name": "[tor-announce] 20120819 Tor 0.2.2.38 is released",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.torproject.org/pipermail/tor-announce/2012-August/000086.html"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://gitweb.torproject.org/tor.git/commit/62637fa22405278758febb1743da9af562524d4c"
          },
          {
            "name": "[oss-security] 20120821 Re: CVE Request -- Tor 0.2.2.38: Three issues",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://openwall.com/lists/oss-security/2012/08/21/6"
          },
          {
            "name": "openSUSE-SU-2012:1068",
            "tags": [
              "vendor-advisory",
              "x_refsource_SUSE",
              "x_transferred"
            ],
            "url": "http://lists.opensuse.org/opensuse-updates/2012-08/msg00048.html"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://trac.torproject.org/projects/tor/ticket/6480"
          },
          {
            "name": "FEDORA-2012-14638",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-September/088006.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "datePublic": "2012-08-19T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Use-after-free vulnerability in dns.c in Tor before 0.2.2.38 might allow remote attackers to cause a denial of service (daemon crash) via vectors related to failed DNS requests."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2012-10-11T09:00:00.000Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "name": "GLSA-201301-03",
          "tags": [
            "vendor-advisory",
            "x_refsource_GENTOO"
          ],
          "url": "http://security.gentoo.org/glsa/glsa-201301-03.xml"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=849949"
        },
        {
          "name": "[tor-announce] 20120819 Tor 0.2.2.38 is released",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.torproject.org/pipermail/tor-announce/2012-August/000086.html"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://gitweb.torproject.org/tor.git/commit/62637fa22405278758febb1743da9af562524d4c"
        },
        {
          "name": "[oss-security] 20120821 Re: CVE Request -- Tor 0.2.2.38: Three issues",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://openwall.com/lists/oss-security/2012/08/21/6"
        },
        {
          "name": "openSUSE-SU-2012:1068",
          "tags": [
            "vendor-advisory",
            "x_refsource_SUSE"
          ],
          "url": "http://lists.opensuse.org/opensuse-updates/2012-08/msg00048.html"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://trac.torproject.org/projects/tor/ticket/6480"
        },
        {
          "name": "FEDORA-2012-14638",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-September/088006.html"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "secalert@redhat.com",
          "ID": "CVE-2012-3517",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "Use-after-free vulnerability in dns.c in Tor before 0.2.2.38 might allow remote attackers to cause a denial of service (daemon crash) via vectors related to failed DNS requests."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "GLSA-201301-03",
              "refsource": "GENTOO",
              "url": "http://security.gentoo.org/glsa/glsa-201301-03.xml"
            },
            {
              "name": "https://bugzilla.redhat.com/show_bug.cgi?id=849949",
              "refsource": "CONFIRM",
              "url": "https://bugzilla.redhat.com/show_bug.cgi?id=849949"
            },
            {
              "name": "[tor-announce] 20120819 Tor 0.2.2.38 is released",
              "refsource": "MLIST",
              "url": "https://lists.torproject.org/pipermail/tor-announce/2012-August/000086.html"
            },
            {
              "name": "https://gitweb.torproject.org/tor.git/commit/62637fa22405278758febb1743da9af562524d4c",
              "refsource": "CONFIRM",
              "url": "https://gitweb.torproject.org/tor.git/commit/62637fa22405278758febb1743da9af562524d4c"
            },
            {
              "name": "[oss-security] 20120821 Re: CVE Request -- Tor 0.2.2.38: Three issues",
              "refsource": "MLIST",
              "url": "http://openwall.com/lists/oss-security/2012/08/21/6"
            },
            {
              "name": "openSUSE-SU-2012:1068",
              "refsource": "SUSE",
              "url": "http://lists.opensuse.org/opensuse-updates/2012-08/msg00048.html"
            },
            {
              "name": "https://trac.torproject.org/projects/tor/ticket/6480",
              "refsource": "CONFIRM",
              "url": "https://trac.torproject.org/projects/tor/ticket/6480"
            },
            {
              "name": "FEDORA-2012-14638",
              "refsource": "FEDORA",
              "url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-September/088006.html"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2012-3517",
    "datePublished": "2012-08-26T01:00:00.000Z",
    "dateReserved": "2012-06-14T00:00:00.000Z",
    "dateUpdated": "2024-08-06T20:05:12.774Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2012-3517",
      "date": "2026-09-19",
      "epss": "0.02775",
      "percentile": "0.85718"
    },
    "nvd": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:tor:tor:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "D87D8965-CE3A-457E-AD9D-C8EE68F538A4",
                    "versionEndIncluding": "0.2.2.37",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Use-after-free vulnerability in dns.c in Tor before 0.2.2.38 might allow remote attackers to cause a denial of service (daemon crash) via vectors related to failed DNS requests."
          },
          {
            "lang": "es",
            "value": "Vulnerabilidad de liberaci\u00f3n despu\u00e9s de uso en dns.c en Tor anterior a 0.2.2.38 podr\u00eda permitir a atacantes remotos causar una denegaci\u00f3n de servicio (ca\u00edda del demonio) a trav\u00e9s de vectores relacionados con solicitudes fallidas de DNS."
          }
        ],
        "id": "CVE-2012-3517",
        "lastModified": "2026-04-29T01:13:23.040",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "PARTIAL",
                "baseScore": 5.0,
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
                "version": "2.0"
              },
              "exploitabilityScore": 10.0,
              "impactScore": 2.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ]
        },
        "published": "2012-08-26T03:17:44.043",
        "references": [
          {
            "source": "secalert@redhat.com",
            "url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-September/088006.html"
          },
          {
            "source": "secalert@redhat.com",
            "url": "http://lists.opensuse.org/opensuse-updates/2012-08/msg00048.html"
          },
          {
            "source": "secalert@redhat.com",
            "url": "http://openwall.com/lists/oss-security/2012/08/21/6"
          },
          {
            "source": "secalert@redhat.com",
            "url": "http://security.gentoo.org/glsa/glsa-201301-03.xml"
          },
          {
            "source": "secalert@redhat.com",
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=849949"
          },
          {
            "source": "secalert@redhat.com",
            "url": "https://gitweb.torproject.org/tor.git/commit/62637fa22405278758febb1743da9af562524d4c"
          },
          {
            "source": "secalert@redhat.com",
            "url": "https://lists.torproject.org/pipermail/tor-announce/2012-August/000086.html"
          },
          {
            "source": "secalert@redhat.com",
            "tags": [
              "Patch"
            ],
            "url": "https://trac.torproject.org/projects/tor/ticket/6480"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-September/088006.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://lists.opensuse.org/opensuse-updates/2012-08/msg00048.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://openwall.com/lists/oss-security/2012/08/21/6"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://security.gentoo.org/glsa/glsa-201301-03.xml"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=849949"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://gitweb.torproject.org/tor.git/commit/62637fa22405278758febb1743da9af562524d4c"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.torproject.org/pipermail/tor-announce/2012-August/000086.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch"
            ],
            "url": "https://trac.torproject.org/projects/tor/ticket/6480"
          }
        ],
        "sourceIdentifier": "secalert@redhat.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-399"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2025-11-21T12:51:05+00:00",
      "cve": "CVE-2012-3517",
      "id": "CVE-2012-3517",
      "initial_release_date": "2012-08-19T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "tor: Read from freed memory and double free by processing failed DNS request",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2012/cve-2012-3517.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Detection rules are retrieved from Rulezet.


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.