CVE-2008-3843 Cross-site scripting in n/a

What is CVE-2008-3843?

CVE-2008-3843 is a medium-severity cross-site scripting vulnerability in Microsoft .Net Framework, published on 27 Aug 2008. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official 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.

Weakness: CWE-79

Which versions are affected by CVE-2008-3843?

It affects 1 product.

Products include Microsoft .Net Framework.

How do I fix CVE-2008-3843?

No fix has been published for CVE-2008-3843 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2008-3843 being exploited?

There is no known exploitation of CVE-2008-3843 in the wild and no public exploit code.

Other vulnerabilities in Microsoft .Net Framework

• CVE-2020-0646 Microsoft .NET Framework Remote Code Execution Exploited Critical 9.8
• CVE-2017-8759 Microsoft .NET Framework Remote Code Execution Exploited High 7.8
• CVE-2015-1671 Microsoft Windows Remote Code Execution Exploited High 7.8
• CVE-2024-29059 Microsoft .NET Framework Information Disclosure Exploited High 7.5
• CVE-2014-4073 Privilege escalation in n/a Critical 10.0

All Microsoft .Net Framework vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-35fc-6m3p-h4pm.