Results of Investigation into Holiday IIS Claim
Tuesday, December 29, 2009
We’ve completed our investigation into the claims that came up over the holiday of a possible vulnerability in IIS and found that there is no vulnerability in IIS. What we have seen is that there is an inconsistency in IIS 6 only in how it handles semicolons in URLs. It’s this inconsistency that the claims have focused on, saying this enables an attacker to bypass content filtering software to upload and execute code on an IIS server.