CVE-2012-4561 (GCVE-0-2012-4561)

Vulnerability from cvelistv5 – Published: 2012-11-30 22:00 – Updated: 2024-08-06 20:42
VLAI
Summary
The (1) publickey_make_dss, (2) publickey_make_rsa, (3) signature_from_string, (4) ssh_do_sign, and (5) ssh_sign_session_id functions in keys.c in libssh before 0.5.3 free "an invalid pointer on an error path," which might allow remote attackers to cause a denial of service (crash) 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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    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2012-4561\",\"sourceIdentifier\":\"secalert@redhat.com\",\"published\":\"2012-11-30T22:55:01.720\",\"lastModified\":\"2026-04-29T01:13:23.040\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"The (1) publickey_make_dss, (2) publickey_make_rsa, (3) signature_from_string, (4) ssh_do_sign, and (5) ssh_sign_session_id functions in keys.c in libssh before 0.5.3 free \\\"an invalid pointer on an error path,\\\" which might allow remote attackers to cause a denial of service (crash) via unspecified vectors.\"},{\"lang\":\"es\",\"value\":\"Las funciones (1) publickey_make_dss, (2) publickey_make_rsa, (3) signature_from_string, (4) ssh_do_sign y (5) ssh_sign_session_id en keys.c en libssh en versiones anteriores a la 0.5.3 liberan \\\"un puntero no v\u00e1lido en una ruta err\u00f3nea\\\", lo que podr\u00eda permitir a atacantes remotos provocar una denegaci\u00f3n de servicio (ca\u00edda) a trav\u00e9s de vectores no especificados.\"}],\"metrics\":{\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:N/I:N/A:P\",\"baseScore\":5.0,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":10.0,\"impactScore\":2.9,\"acInsufInfo\":true,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"0.5.2\",\"matchCriteriaId\":\"5C70E449-A62A-4670-8786-093A915EF07C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:libssh:libssh:0.4.7:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"EA0F1552-63D8-4E97-A44A-EF55E8A330B7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:libssh:libssh:0.4.8:*:*:*:*:*:*:*\",\"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\"}]}]}],\"references\":[{\"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\"},{\"url\":\"http://www.libssh.org/2012/11/20/libssh-0-5-3-security-release/\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Vendor Advisory\"]},{\"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=871617\",\"source\":\"secalert@redhat.com\"},{\"url\":\"https://exchange.xforce.ibmcloud.com/vulnerabilities/80220\",\"source\":\"secalert@redhat.com\"},{\"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\"},{\"url\":\"http://www.libssh.org/2012/11/20/libssh-0-5-3-security-release/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]},{\"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=871617\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://exchange.xforce.ibmcloud.com/vulnerabilities/80220\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
  }
}


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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.