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+ - Vista Exploit Surfaces on Russian Hacker Site

Submitted by
nithinraju
nithinraju writes "Proof-of-concept exploit code for a privilege escalation vulnerability affecting all versions of Windowsincluding Vistahas been posted on a Russian hacker forum, forcing Microsoft to activate its emergency response process. Mike Reavey, operations manager of the Microsoft Security Response Center, confirmed that the company is closely monitoring the public posting, which first appeared on a Russian language forum on Dec. 15. It affects csrss.exe, which is the main executable for the Microsoft Client/Server Runtime Server. According to an alert cross-posted to security mailing lists, the vulnerability is caused by a memory corruption when certain strings are sent through the MessageBox API. The PoC reportedly allows for local elevation of privilege on Windows 2000 SP4, Windows Server 2003 SP1, Windows XP SP1, Windows XP SP2 and Windows Vista operating systems, Reavey said in an entry posted late Dec. 21 on the MSRC blog. Initial indications are that in order for the attack to be successful, the attacker must already have authenticated access to the target system. Of course these are preliminary findings and we have activated our emergency response process involving a multitude of folks who are investigating the issue in depth to determine the full scope and potential impact to Microsofts customers, Reavey added. While I know this is a vulnerability that impacts Windows Vista I still have every confidence that Windows Vista is our most secure platform to date, he added. The MSRC is expected to issue a formal security advisory with pre-patch workarounds. In the interim, the company is urging customers to enable a firewall, apply all security updates and install anti-virus and anti-spyware protection. To date, there are no reports of actual attacks against Windows users. The Microsoft confirmation comes hard on the heels of a claim by anti-virus vendor Trend Micro that underground hackers are selling zero-day exploits for Windows Vista at $50,000 a pop. MY BLOG IS http://alieneliminator.wordpress.com/"

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