Spyware, Viruses, & Security forum

General discussion

Yahoo Messenger Exploits - Upgrade to Latest version

by harrywaldron / June 11, 2007 3:30 AM PDT

Users of Yahoo's Messenger Instant Messaging need to move to the latest version as quickly as possible. Two serious seriousy vulnerabilities have surfaced that are now being exploited in-the-wild

Yahoo repaired these deficiencies within hours and the first link below provides the site for downloading the more secure version.

Solution -- Update to the latest version:
http://messenger.yahoo.com

Yahoo Messenger exploits seen in the wild
http://isc.sans.org/diary.html?storyid=2952

Two Yahoo Messenger vulnerabilities (with PoCs)
http://isc.sans.org/diary.html?storyid=2943

Yahoo Messenger - Overview of Vulnerabilities
http://secunia.com/advisories/25547/
http://messenger.yahoo.com/security_update.php?id=060707
http://lists.grok.org.uk/pipermail/full-disclosure/2007-June/063817.html
http://lists.grok.org.uk/pipermail/full-disclosure/2007-June/063819.html

QUOTE: Two vulnerabilities in Yahoo Messenger can be exploited by malicious people to compromise a user's system.

1) A boundary error within the Yahoo! Webcam Upload (ywcupl.dll) ActiveX control can be exploited to cause a stack-based buffer overflow by assigning an overly long string to the "Server" property and then calling the "Send()" method.

2) A boundary error within the Yahoo! Webcam Viewer (ywcvwr.dll) ActiveX control can be exploited to cause a stack-based buffer overflow by assigning an overly long string to the "Server" property and then calling the "Receive()" method.

Successful exploitation of the vulnerabilities allows execution of arbitrary code. The vulnerabilities are confirmed in version 8.1.0.249. Other versions may also be affected.

Discussion is locked
You are posting a reply to: Yahoo Messenger Exploits - Upgrade to Latest version
The posting of advertisements, profanity, or personal attacks is prohibited. Please refer to our CNET Forums policies for details. All submitted content is subject to our Terms of Use.
Track this discussion and email me when there are updates

If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem. Also please exercise your best judgment when posting in the forums--revealing personal information such as your e-mail address, telephone number, and address is not recommended.

You are reporting the following post: Yahoo Messenger Exploits - Upgrade to Latest version
This post has been flagged and will be reviewed by our staff. Thank you for helping us maintain CNET's great community.
Sorry, there was a problem flagging this post. Please try again now or at a later time.
If you believe this post is offensive or violates the CNET Forums' Usage policies, you can report it below (this will not automatically remove the post). Once reported, our moderators will be notified and the post will be reviewed.
Collapse -
Thanks Harry :-)
by Donna Buenaventura / June 11, 2007 3:47 AM PDT
Collapse -
Malicious Web site/Malicious Code: Yahoo! Messenger Exploits
by Donna Buenaventura / June 11, 2007 4:54 AM PDT
Popular Forums
icon
Computer Newbies 10,686 discussions
icon
Computer Help 54,365 discussions
icon
Laptops 21,181 discussions
icon
Networking & Wireless 16,313 discussions
icon
Phones 17,137 discussions
icon
Security 31,287 discussions
icon
TVs & Home Theaters 22,101 discussions
icon
Windows 7 8,164 discussions
icon
Windows 10 2,657 discussions

Does BMW or Volvo do it best?

Pint-size luxury and funky style

Shopping for a new car this weekend? See how the BMW X2 stacks up against the Volvo XC40 in our side-by-side comparison.