GNU ZRTPCPP before 3.2.0 allows remote attackers to obtain sensitive information (uninitialized heap memory) or cause a denial of service (out-of-bounds read) via a crafted packet, as demonstrated by a truncated Ping packet that is not properly handled by the getEpHash function.
blog.azimuthsecurity.com/2013/06/attacking-crypto-phones-weaknesses-in.html
lists.opensuse.org/opensuse-updates/2013-10/msg00052.html
lists.opensuse.org/opensuse-updates/2013-10/msg00053.html
seclists.org/oss-sec/2013/q2/638
secunia.com/advisories/53818
secunia.com/advisories/54998
security.gentoo.org/glsa/glsa-201309-13.xml
github.com/wernerd/ZRTPCPP/commit/4654f330317c9948bb61d138eb24d49690ca4637