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CVE-2008-3843

4.3 · MEDIUM

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 t…

Published Aug 27, 2008microsoftCWE-79EPSS 21.99%

Overview

CVE-2008-3843 is a medium-severity vulnerability affecting microsoft windows-nt. It was published on August 27, 2008 and has a CVSS 2.0 base score of 4.3 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from microsoft. Update windows-nt to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Refsecurityreason.com/securityalert/4193Refwww.procheckup.com/PDFs/bypassing-dot-NET-ValidateRequest.pdfRefwww.procheckup.com/Vulnerability_PR08-20.phpRefwww.securityfocus.com/archive/1/495667/100/0/threadedRefwww.securityfocus.com/archive/1/496071/100/0/threadedRefexchange.xforce.ibmcloud.com/vulnerabilities/44743Refsecurityreason.com/securityalert/4193Refwww.procheckup.com/PDFs/bypassing-dot-NET-ValidateRequest.pdfRefwww.procheckup.com/Vulnerability_PR08-20.phpRefwww.securityfocus.com/archive/1/495667/100/0/threaded

How CyberStrike helps

Frequently asked questions

What is CVE-2008-3843?

CVE-2008-3843 is a medium-severity vulnerability affecting microsoft windows-nt. It was published on August 27, 2008 and has a CVSS 2.0 base score of 4.3 (MEDIUM).

How severe is CVE-2008-3843?

This vulnerability has a CVSS 2.0 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2008-3843?

Check the references section for vendor advisories and patches from microsoft. Update windows-nt to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2008-3843?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2008-3843 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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