Security researchers have discovered a zero-day vulnerability in Microsoft Word, which is already being actively exploited by hackers in China and Taiwan. Microsoft's Security Response Center says it is working with antivirus vendors to prevent attacks and plans to release a security patch on June 13.
The exploit is spread as a Word document attached to an e-mail. Users who open the attachment with Word XP and Word 2003 are then infected with a trojan that contains rootkit-like features in order to hide itself from antivirus scanners.
The trojan communicates back to a server, but it's not yet clear what data is transferred. "When the exploit is launched, early on in the process, it drops a bot, possibly Rbot or some variant," said SANS Internet Storm Center researcher Chris Carboni in a diary entry.
"Once the bot is in place, it begins an extensive recon of the system; installed patches, installed AV, contents of My Documents, startup file contents, IE config, etc."
No antivirus application currently detects the exploit, according to SANS. Microsoft is hoping to remedy this problem and says it is working closely with security vendors. The Redmond company plans to update its own Windows Live Safety Center with definitions that detect the new attack.
"The Office team is hard at work on an update that addresses the vulnerability. It's in testing right now to make sure it's of the right quality for release," said Microsoft security researcher Stephen Toulouse. "Right now we're on schedule to be released as part of the June security updates on June 13, 2006, or sooner as warranted."
Tools: Post a comment | Link to this news item | Send to a friend | Submit News
Error: You are not logged in.
In order to leave comments to news articles you must be a Cyber Tech Help Member.
Registration is completely free!
Register to become a member
Along with access to leave comments to news articles you will be able to ask any computing questions you might have on the Cyber Tech Help Forums.
