Ubuntu Security Notice USN-233-1 – Steve Fosdick discovered a remote Denial of Service vulnerability in fetchmail. When using fetchmail in ‘multidrop’ mode, a malicious email server could cause a crash by sending an email without any headers.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/42751/USN-233-1.txt
Source: https://packetstormsecurity.com/files/42751/Ubuntu-Security-Notice-233-1.html