CVE-2008-3843

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

Link	Tags
http://www.securityfocus.com/archive/1/496071/100/0/threaded	mailing list
https://exchange.xforce.ibmcloud.com/vulnerabilities/44743	vdb entry
http://www.procheckup.com/PDFs/bypassing-dot-NET-ValidateRequest.pdf
http://securityreason.com/securityalert/4193	third party advisory
http://www.securityfocus.com/archive/1/495667/100/0/threaded	mailing list
http://www.procheckup.com/Vulnerability_PR08-20.php

Frequently Asked Questions

What is the severity of CVE-2008-3843?: CVE-2008-3843 has been scored as a medium severity vulnerability.
How to fix CVE-2008-3843?: To fix CVE-2008-3843, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2008-3843 being actively exploited in the wild?: It is possible that CVE-2008-3843 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~20% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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Description

Category

CWE-79 – Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

References

Frequently Asked Questions