CVE-2012-4561

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.

🔗 References (26)

• secalert@redhathttp://lists.fedoraproject.org/pipermail/package-announce/2012-November/093313.html
• secalert@redhathttp://lists.fedoraproject.org/pipermail/package-announce/2012-November/093474.html
• secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2012-12/msg00002.html
• secalert@redhathttp://lists.opensuse.org/opensuse-updates/2012-12/msg00016.html
• secalert@redhathttp://lists.opensuse.org/opensuse-updates/2013-01/msg00021.html
• secalert@redhathttp://www.debian.org/security/2012/dsa-2577
• secalert@redhathttp://www.libssh.org/2012/11/20/libssh-0-5-3-security-release/
• secalert@redhathttp://www.mandriva.com/security/advisories?name=MDVSA-2012:175
• secalert@redhathttp://www.openwall.com/lists/oss-security/2012/11/20/3
• secalert@redhathttp://www.securityfocus.com/bid/56604
• secalert@redhathttp://www.ubuntu.com/usn/USN-1640-1
• secalert@redhathttps://bugzilla.redhat.com/show_bug.cgi?id=871617
• secalert@redhathttps://exchange.xforce.ibmcloud.com/vulnerabilities/80220
• af854a3a-2127-422b-91ae-364da2661108http://lists.fedoraproject.org/pipermail/package-announce/2012-November/093313.html
• af854a3a-2127-422b-91ae-364da2661108http://lists.fedoraproject.org/pipermail/package-announce/2012-November/093474.html