The svcauth_gss_accept_sec_context function in lib/rpc/svc_auth_gss.c in MIT Kerberos 5 (aka krb5) 1.11.x through 1.11.5, 1.12.x through 1.12.2, and 1.13.x before 1.13.1 transmits uninitialized interposer data to clients, which allows remote attackers to obtain sensitive information from process heap memory by sniffing the network for data in a handle field.
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151103.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151437.html
http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00011.html
http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00016.html
http://lists.opensuse.org/opensuse-updates/2015-02/msg00044.html
http://rhn.redhat.com/errata/RHSA-2015-0439.html
http://web.mit.edu/kerberos/advisories/2015-001-patch-r113.txt
http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2015-001.txt
http://www.debian.org/security/2015/dsa-3153
http://www.mandriva.com/security/advisories?name=MDVSA-2015:069
http://www.securityfocus.com/bid/72503
http://www.ubuntu.com/usn/USN-2498-1
https://github.com/krb5/krb5/commit/5bb8a6b9c9eb8dd22bc9526751610aaa255ead9c