Ubuntu Security Notice USN-240-1 – A buffer overflow was found in bogofilter’s character set conversion handling. Certain invalid UTF-8 character sequences caused an invalid memory access. By sending a specially crafted email, a remote attacker could exploit this to crash bogofilter or possibly even execute arbitrary code with bogofilter’s privileges.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/43055/USN-240-1.txt
Source: https://packetstormsecurity.com/files/43055/Ubuntu-Security-Notice-240-1.html