A longstanding bug that was recently found in the crypt_blowfish password hashing library highlights the problems that can occur when a bug is found in a widely used low-level library. Because crypt_blowfish has been around for so long (this bug is said to go back to 1998 or possibly 1997), it has been used by various other packages (PHP for example) as well as some Linux distributions. The security impact is not likely to be huge, because it only affects passwords with somewhat uncommon characteristics, but the impact on those who have stored hashed passwords generated using the library may be a bit more painful. Subscribers can click below for a look at the bug from this week's Security page.