CVE-2012-4561 Information

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.

Reference

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