Description
Request Validation (aka the ValidateRequest filters) in ASP.NET in Microsoft .NET Framework with the MS07-040 update does not properly detect dangerous client input, which allows remote attackers to conduct cross-site scripting (XSS) attacks, as demonstrated by a query string containing a "<~/" (less-than tilde slash) sequence followed by a crafted STYLE element.
References
- 20080908 Re: [WEB SECURITY] PR08-20: Bypassing ASP .NET "ValidateRequest" for Script Injection Attacks mailing-list
- asp-validaterequestfilter-xss(44743) vdb-entry
- http://www.procheckup.com/PDFs/bypassing-dot-NET-ValidateRequest.pdf
- 4193 third-party-advisory
- 20080821 PR08-20: Bypassing ASP .NET "ValidateRequest" for Script Injection Attacks mailing-list
- http://www.procheckup.com/Vulnerability_PR08-20.php