A couple of extremely critical vulnerabilities were discovered anddisclosed in Yahoo! Messenger two days ago, on June 6th. Late lastnight and early this morning, exploits were released to take advantageof these issues. At the time of the release, Yahoo had not yet patchedthe issues, so Yahoo! Messenger users were at significant risk of beingattacked.
The two vulnerabilities are both buffer overflows in the ActiveXcontrol that handles Yahoo’s Webcam functionality . Due to theexploits being released publicly, anyone can carry out an attack bypersuading a user into following a link to a malicious file.
Fortunately, Yahoo has released an update to their Yahoo! Messengerproduct to resolve this issue. The latest version of the software,version 8.1, is reportedly not vulnerable. Users should update as soonas possible to reduce their exposure to potential attacks.