randal writes "A security vulnerability in the Sendmail Mail Transfer Agent (MTA) has been identified by ISS. This bug can give an attacker the ability to gain remote root access to the targeted system. There is no known exploit code of this vulnerability in the wild at this time, but everyone should upgrade immediately. This issue affects all versions since 5.79. Open Source sendmail users can get source for the newest version (8.12.8) as well as patches for 8.9, 8.11, and 8.12 from sendmail.org. Commercial Sendmail customers can find patches at sendmail.com/security. Most major OS vendors will be releasing patches immediately." Update: 03/03 19:23 GMT by T : Reader Patchlevel points out that RedHat and OpenBSD have already issued patches.Update: 03/03 20:45 GMT by T : Reader Claude Meyer links to an update from SuSE, too. Update: 03/03 22:52 GMT by T : djcatnip points out that Apple has released a software update to patch OpenSSL and Sendmail for Mac OS X 10.2.4, and the Slackware site says they have updated to 8.12.8 as well.