CVE-2012-4559 (GCVE-0-2012-4559)

Vulnerability from cvelistv5 – Published: 2012-11-30 22:00 – Updated: 2024-08-06 20:42
VLAI
Summary
Multiple double free vulnerabilities in the (1) agent_sign_data function in agent.c, (2) channel_request function in channels.c, (3) ssh_userauth_pubkey function in auth.c, (4) sftp_parse_attr_3 function in sftp.c, and (5) try_publickey_from_file function in keyfiles.c in libssh before 0.5.3 allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unspecified vectors.
Severity
No CVSS data available.
CWE
  • n/a
Assigner
References
Date Public
2012-11-20 00:00
Show details on NVD website
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                    "matchCriteriaId": "6514D889-F87F-44D1-9C7B-5BE75676DCFF",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:libssh:libssh:0.5.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "A80094C5-1273-43AB-9E1E-096D8B0A60BB",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:libssh:libssh:0.5.0:rc1:*:*:*:*:*:*",
                    "matchCriteriaId": "CF67514C-3240-42A4-9996-21E855104C59",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:libssh:libssh:0.5.1:*:*:*:*:*:*:*",
                    "matchCriteriaId": "7BBD0BC3-2467-414E-BD82-2A5778B810F9",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Multiple double free vulnerabilities in the (1) agent_sign_data function in agent.c, (2) channel_request function in channels.c, (3) ssh_userauth_pubkey function in auth.c, (4) sftp_parse_attr_3 function in sftp.c, and (5) try_publickey_from_file function in keyfiles.c in libssh before 0.5.3 allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unspecified vectors."
          },
          {
            "lang": "es",
            "value": "M\u00faltiples vulnerabilidades de doble liberaci\u00f3n en  las funciones (1) agent_sign_data en agent.c, (2) channel_request en channels.c, (3) ssh_userauth_pubkey en auth.c, (4) sftp_parse_attr_3 en sftp.c, y (5) try_publickey_from_file en keyfiles.c en libssh antes de v0.5.3 permiten a atacantes remotos provocar una denegaci\u00f3n de servicio (ca\u00edda de la aplicaci\u00f3n) y posiblemente ejecutar c\u00f3digo de su elecci\u00f3n a trav\u00e9s de vectores no especificados.\r\n"
          }
        ],
        "id": "CVE-2012-4559",
        "lastModified": "2026-04-29T01:13:23.040",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "MEDIUM",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "PARTIAL",
                "baseScore": 6.8,
                "confidentialityImpact": "PARTIAL",
                "integrityImpact": "PARTIAL",
                "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
                "version": "2.0"
              },
              "exploitabilityScore": 8.6,
              "impactScore": 6.4,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": true
            }
          ]
        },
        "published": "2012-11-30T22:55:01.643",
        "references": [
          {
            "source": "secalert@redhat.com",
            "url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-November/093313.html"
          },
          {
            "source": "secalert@redhat.com",
            "url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-November/093474.html"
          },
          {
            "source": "secalert@redhat.com",
            "url": "http://lists.opensuse.org/opensuse-security-announce/2012-12/msg00002.html"
          },
          {
            "source": "secalert@redhat.com",
            "url": "http://lists.opensuse.org/opensuse-updates/2012-12/msg00016.html"
          },
          {
            "source": "secalert@redhat.com",
            "url": "http://lists.opensuse.org/opensuse-updates/2013-01/msg00021.html"
          },
          {
            "source": "secalert@redhat.com",
            "url": "http://www.debian.org/security/2012/dsa-2577"
          },
          {
            "source": "secalert@redhat.com",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "http://www.libssh.org/2012/11/20/libssh-0-5-3-security-release/"
          },
          {
            "source": "secalert@redhat.com",
            "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2012:175"
          },
          {
            "source": "secalert@redhat.com",
            "url": "http://www.openwall.com/lists/oss-security/2012/11/20/3"
          },
          {
            "source": "secalert@redhat.com",
            "url": "http://www.securityfocus.com/bid/56604"
          },
          {
            "source": "secalert@redhat.com",
            "url": "http://www.ubuntu.com/usn/USN-1640-1"
          },
          {
            "source": "secalert@redhat.com",
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=871612"
          },
          {
            "source": "secalert@redhat.com",
            "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/80218"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-November/093313.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-November/093474.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://lists.opensuse.org/opensuse-security-announce/2012-12/msg00002.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://lists.opensuse.org/opensuse-updates/2012-12/msg00016.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://lists.opensuse.org/opensuse-updates/2013-01/msg00021.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://www.debian.org/security/2012/dsa-2577"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "http://www.libssh.org/2012/11/20/libssh-0-5-3-security-release/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2012:175"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://www.openwall.com/lists/oss-security/2012/11/20/3"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://www.securityfocus.com/bid/56604"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://www.ubuntu.com/usn/USN-1640-1"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=871612"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/80218"
          }
        ],
        "sourceIdentifier": "secalert@redhat.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-399"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2025-11-21T12:48:45+00:00",
      "cve": "CVE-2012-4559",
      "id": "CVE-2012-4559",
      "initial_release_date": "2012-11-20T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "libssh: multiple double free() flaws",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2012/cve-2012-4559.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-04-13T10:17:47Z",
      "cve": "CVE-2012-4559",
      "id": "CVE-2012-4559",
      "initial_release_date": "2023-02-15T05:44:30Z",
      "product_status:known_not_affected": "13",
      "product_status:recommended": "107",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2012-4559",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2012-4559.json",
      "version": "16"
    }
  }
}



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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.