When open source software makers made what would eventually become the more current versions of Linux, Unix, and Mac OS X, they undertook a very important task: ensuring that whenever a password was generated to keep confidential data secret, that it would actually be secure. However, they apparently made a rudimentary programming error, and it went out into the world of open source software unnoticed. A couple years down the road, some hackers pointed out with glee that the OpenSSL key generator is basically useless as a security measure (the actual flaw is explained much more thoroughly in the source link). Because OpenSSL is used in far more systems than a couple home servers, we have a serious problem on our hands. Even though the original authors have issued a patch, there's no guarantee that it will get around fast enough to prevent some serious damage.