Buffer overflow in libtelnet/encrypt.c in telnetd in FreeBSD 7.3 through 9.0, MIT Kerberos Version 5 Applications (aka krb5-appl) 1.0.2 and earlier, Heimdal 1.5.1 and earlier, GNU inetutils, and possibly other products allows remote attackers to execute arbitrary code via a long encryption key, as exploited in the wild in December 2011.
archives.neohapsis.com/archives/bugtraq/2011-12/0172.html
git.savannah.gnu.org/cgit/inetutils.git/commit/?id=665f1e73cdd9b38e2d2e11b8db9958a315935592
lists.fedoraproject.org/pipermail/package-announce/2012-January/071627.html
lists.fedoraproject.org/pipermail/package-announce/2012-January/071640.html
lists.freebsd.org/pipermail/freebsd-security/2011-December/006117.html
lists.freebsd.org/pipermail/freebsd-security/2011-December/006118.html
lists.freebsd.org/pipermail/freebsd-security/2011-December/006119.html
lists.freebsd.org/pipermail/freebsd-security/2011-December/006120.html
lists.opensuse.org/opensuse-security-announce/2012-01/msg00002.html
lists.opensuse.org/opensuse-security-announce/2012-01/msg00004.html
lists.opensuse.org/opensuse-security-announce/2012-01/msg00005.html
lists.opensuse.org/opensuse-security-announce/2012-01/msg00007.html
lists.opensuse.org/opensuse-security-announce/2012-01/msg00010.html
lists.opensuse.org/opensuse-security-announce/2012-01/msg00011.html
lists.opensuse.org/opensuse-security-announce/2012-01/msg00014.html
lists.opensuse.org/opensuse-security-announce/2012-01/msg00015.html
osvdb.org/78020
secunia.com/advisories/46239
secunia.com/advisories/47341
secunia.com/advisories/47348
secunia.com/advisories/47357
secunia.com/advisories/47359
secunia.com/advisories/47373
secunia.com/advisories/47374
secunia.com/advisories/47397
secunia.com/advisories/47399
secunia.com/advisories/47441
security.freebsd.org/advisories/FreeBSD-SA-11:08.telnetd.asc
security.freebsd.org/patches/SA-11:08/telnetd.patch
web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2011-008.txt
www.debian.org/security/2011/dsa-2372
www.debian.org/security/2011/dsa-2373
www.debian.org/security/2011/dsa-2375
www.exploit-db.com/exploits/18280/
www.mandriva.com/security/advisories?name=MDVSA-2011:195
www.redhat.com/support/errata/RHSA-2011-1851.html
www.redhat.com/support/errata/RHSA-2011-1852.html
www.redhat.com/support/errata/RHSA-2011-1853.html
www.redhat.com/support/errata/RHSA-2011-1854.html
www.securitytracker.com/id?1026460
www.securitytracker.com/id?1026463
exchange.xforce.ibmcloud.com/vulnerabilities/71970