Multiple stack-based buffer overflows in GNU ZRTPCPP before 3.2.0 allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted ZRTP Hello packet to the (1) ZRtp::findBestSASType, (2) ZRtp::findBestAuthLen, (3) ZRtp::findBestCipher, (4) ZRtp::findBestHash, or (5) ZRtp::findBestPubKey functions.
https://github.com/wernerd/ZRTPCPP/commit/4654f330317c9948bb61d138eb24d49690ca4637
http://security.gentoo.org/glsa/glsa-201309-13.xml
http://secunia.com/advisories/54998
http://secunia.com/advisories/53818
http://seclists.org/oss-sec/2013/q2/638
http://lists.opensuse.org/opensuse-updates/2013-10/msg00053.html
http://lists.opensuse.org/opensuse-updates/2013-10/msg00052.html