A vulnerability was discovered in PolarSSL, a lightweight crypto and SSL/TLS library. A remote attacker could exploit this flaw using specially crafted certificates to mount a denial of service against an application linked against the library (application crash), or potentially, to execute arbitrary code.
For the stable distribution (wheezy), this problem has been fixed in version 1.2.9-1~deb7u5.
For the upcoming stable distribution (jessie) and the unstable distribution (sid), this problem will be fixed soon.
We recommend that you upgrade your polarssl packages.