p2pnet - rss feed: Serious Yahoo Messenger flaw
p2pnet.net news:- More trouble for Yahoo.
Sued for allegedly releasing information which led to Chinese dissidents being jailed, and being eyed suspiciously following an assertion by one of its senior people that the future of the web isn’t about search, now Yahoo Messenger has two extremely critical security holes which could allow hackers to gain control of victims’ systems, says Secunia, going on:
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.
Solution: Set the kill-bit for the affected ActiveX controls.
Also See:
jailed - Yahoo in new China dissident lawsuit, March 31, 2007
eyed suspiciously - The Net isn’t about search: Yahoo, June 6, 2007
Secunia - Yahoo! Messenger Two ActiveX Controls Buffer Overflows, June 7, 2007
If your Net access is blocked by government restrictions, try Psiphon from the Citizen Lab at the University of Toronto’s Munk Centre for International Studies. Go here for the official download, and here for details. And if you’re Chinese and you’re looking for a way to access independent Internet news sources, try Freegate, the DIT program written to help Chinese citizens circumvent web site blocking outside of China. Download it here.
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Tired of being treated like a criminal? They depend on you, not the other way around. Don’t buy their ‘product’. Do bug your local politicians. Use emails, snail-mail, phone calls, faxes, IM, stop them in the street, blog. And if you’re into organizing, organize petitions, organize demonstrations and then turn up on your local political rep’s doorstep, making sure you’ve contacted your local tv/radio station/newspaper in advance. Don’t just complain. Do something!
