snydeq writes "Microsoft confirmed that its IIS Web-server software contains a vulnerability that could let attackers steal data, but downplayed the threat, saying 'only a specific IIS configuration is at risk from this vulnerability.' The flaw, which involves how Microsoft's software processes Unicode tokens, has been found to give attackers a way to view protected files on IIS Web servers without authorization. The vulnerability, exposed by Nikolaos Rangos, could be used to upload files as well. Affecting IIS 6 users who have enabled WebDAV for sharing documents via the Web, the flaw is currently being exploited in online attacks, according to CERT, and is reminiscent of the well-known IIS unicode path traversal issue of 2001, one of the worst Windows vulnerabilities of the past decade."
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