Ubuntu Security Notice 2390-1 – Jacob Appelbaum and an anonymous person discovered that Pidgin incorrectly handled certificate validation. A remote attacker could exploit this to perform a man in the middle attack to view sensitive information or alter encrypted communications. Yves Younan and Richard Johnson discovered that Pidgin incorrectly handled certain malformed MXit emoticons. A malicious remote server or a man in the middle could use this issue to cause Pidgin to crash, resulting in a denial of service. Various other issues were also addressed.