Microsoft rebuts IIS vulnerability claims

Redmond follows up on a security researcher's claims of a URL loophole that could let an attacker upload and execute code on an Web server.

Microsoft has denied claims of a new vulnerability in Internet Information Services (IIS) 6, putting the blame instead on poorly configured Web servers.

In a blog post Tuesday, Redmond said it had completed an investigation into claims that a flaw in how the IIS interprets file extensions in uniform resource locators (URLs) can enable an attacker to bypass content filtering software to upload and execute code on an IIS server. The company found "no vulnerability" in IIS.

Security researcher Soroush Dalili highlighted the issue on Christmas Day in a paper released via his Web site (PDF), describing the impact as "highly critical for Web applications."

Read more of "Microsoft debunks IIS vulnerability claims" at ZDNet Asia.

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