(KBID5568) PGP-signed messages get corrupted during scan
When Bitdefender scanning is activated, VSAPI MIME parser splits the messages in its constituent elements, before passing them one by one to the antivirus. On some Exchange servers, the repacked message is converted to a standard 7-bit encoding, corrupting in the process the inline PGP key. This is a flaw in the current MIME parser implementation in Microsoft Exchange.For example, in the sample sent message (1), the MIME header has the value and the charset to . When Bitdefender scanning is activated (2), is reduced to , while the charset becomes .