Asterisk Project Security Advisory – Multiple buffer overflows were discovered due to the use of sprintf in Asterisk’s IMAP-specific voicemail code.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/59999/AST-2007-022.txt
Source: https://packetstormsecurity.com/files/59999/AST-2007-022.txt.html