Unrated severityNVD Advisory· Published Nov 30, 2012· Updated Jun 16, 2026
CVE-2012-4559
CVE-2012-4559
Description
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
8cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*+ 6 more
- cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*range: <=0.5.2
- 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:*:*:*:*:*:*:*
- (no CPE)range: <0.5.3
Patches
Vulnerability mechanics
References
13- www.libssh.org/2012/11/20/libssh-0-5-3-security-release/nvdVendor Advisory
- lists.fedoraproject.org/pipermail/package-announce/2012-November/093313.htmlnvd
- lists.fedoraproject.org/pipermail/package-announce/2012-November/093474.htmlnvd
- lists.opensuse.org/opensuse-security-announce/2012-12/msg00002.htmlnvd
- lists.opensuse.org/opensuse-updates/2012-12/msg00016.htmlnvd
- lists.opensuse.org/opensuse-updates/2013-01/msg00021.htmlnvd
- www.debian.org/security/2012/dsa-2577nvd
- www.mandriva.com/security/advisoriesnvd
- www.openwall.com/lists/oss-security/2012/11/20/3nvd
- www.securityfocus.com/bid/56604nvd
- www.ubuntu.com/usn/USN-1640-1nvd
- bugzilla.redhat.com/show_bug.cginvd
- exchange.xforce.ibmcloud.com/vulnerabilities/80218nvd
News mentions
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