Huge Vulnerability in GPG
GPG is an open-source version of the PGP e-mail encryption protocol. Recently, a very serious vulnerability was discovered in the software: given a signed e-mail message, you can modify the message—specifically, you can prepend or append arbitrary data—without disturbing the signature verification.
It appears this bug has existed for years without anybody finding it.
Moral: Open source does not necessarily mean “fewer bugs.” I wrote about this back in 1999.
UPDATED TO ADD (3/13): This bug is fixed in Version 220.127.116.11. Users should upgrade immediately.