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Tuesday, March 25, 2008

New Microsoft Excel Zero-Day Vulnerability

New Microsoft Excel Zero-Day Vulnerability

Microsoft has warned the user community of a new, undocumented vulnerability in Microsoft's Excel spreadsheet program which is being used to launch computer attacks against specific targets. This vulnerability is being exploited to load a Trojan on select computer targets and has been rated "extremely critical" by Secunia.

According to “The attackers are using booby-trapped Excel documents, sent by e-mail to the target's mailbox. If a rigged .xls document is launched, the exploit happens silently in the background, infecting the machine with a Trojan downloader that opens a backdoor and waits for instructions from a server controlled by the attacker”.

Microsoft has released and an advisory on this issue.

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