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CVE-2012-4561 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

No CVSS 3.x data is available for this CVE.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
http://lists.fedoraproject.org/pipermail/package-announce/2012-November/093313.html	CVE
http://lists.fedoraproject.org/pipermail/package-announce/2012-November/093474.html	CVE
http://lists.opensuse.org/opensuse-security-announce/2012-12/msg00002.html	CVE
http://lists.opensuse.org/opensuse-updates/2012-12/msg00016.html	CVE
http://lists.opensuse.org/opensuse-updates/2013-01/msg00021.html	CVE
https://bugzilla.redhat.com/show_bug.cgi?id=871617	CVE
https://exchange.xforce.ibmcloud.com/vulnerabilities/80220	CVE
http://www.debian.org/security/2012/dsa-2577	CVE
http://www.libssh.org/2012/11/20/libssh-0-5-3-security-release/	CVE	Vendor Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2012:175	CVE
http://www.openwall.com/lists/oss-security/2012/11/20/3	CVE
http://www.securityfocus.com/bid/56604	CVE
http://www.ubuntu.com/usn/USN-1640-1	CVE
http://lists.fedoraproject.org/pipermail/package-announce/2012-November/093313.html	[email protected]
http://lists.fedoraproject.org/pipermail/package-announce/2012-November/093474.html	[email protected]
http://lists.opensuse.org/opensuse-security-announce/2012-12/msg00002.html	[email protected]
http://lists.opensuse.org/opensuse-updates/2012-12/msg00016.html	[email protected]
http://lists.opensuse.org/opensuse-updates/2013-01/msg00021.html	[email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=871617	[email protected]
https://exchange.xforce.ibmcloud.com/vulnerabilities/80220	[email protected]
http://www.debian.org/security/2012/dsa-2577	[email protected]
http://www.libssh.org/2012/11/20/libssh-0-5-3-security-release/	[email protected]	Vendor Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2012:175	[email protected]
http://www.openwall.com/lists/oss-security/2012/11/20/3	[email protected]
http://www.securityfocus.com/bid/56604	[email protected]
http://www.ubuntu.com/usn/USN-1640-1	[email protected]

see all 26 references

Weakness Enumeration

CWE-ID	CWE Name	Source
NVD-CWE-noinfo	Insufficient Information to Classify Weakness	[email protected]

Affected Products

Product	Versions
libssh libssh	<= 0.5.2 0.4.7 0.4.8 0.5.0 0.5.0 rc1
CPE cpe:2.3:a:libssh:libssh:::::::: cpe:2.3:a:libssh:libssh:0.4.7:::::::* cpe:2.3:a:libssh:libssh:0.4.8:::::::* cpe:2.3:a:libssh:libssh:0.5.0:::::::* cpe:2.3:a:libssh:libssh:0.5.0:rc1:::::: cpe:2.3:a:libssh:libssh:0.5.1:::::::* Remediation No remediation found in references.

Change History

8 change records found show changes

Date	Action	Recorded By
Jun 16, 2026	CVE Modified	[email protected]
Apr 29, 2026	Status Change	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Aug 29, 2017	CVE Modified	[email protected]
May 18, 2016	CVE Translated	[email protected]
May 17, 2016	CVE Modified	[email protected]
Dec 3, 2012	Initial Analysis	[email protected]