CVE-2011-3416 Auth bypass in n/a

High 8.5 Published Updated

Remote authenticated users can bypass ASP.NET Forms Authentication to access arbitrary user accounts via a crafted username.

Exploited in the wild
Not known
Login needed
Any signed-in user
Attackable
Over the internet
Victim action needed
Not needed
Fix
None listed

What is CVE-2011-3416?

CVE-2011-3416 is a high-severity authentication bypass vulnerability in Microsoft Windows 7, published on 30 Dec 2011. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

The Forms Authentication feature in the ASP.NET subsystem in Microsoft .NET Framework 1.1 SP1, 2.0 SP2, 3.5 SP1, 3.5.1, and 4.0 allows remote authenticated users to obtain access to arbitrary user accounts via a crafted username, aka "ASP.Net Forms Authentication Bypass Vulnerability."

Weakness: CWE-264

Which versions are affected by CVE-2011-3416?

It affects 5 products.

Products include Microsoft Windows 7, Microsoft Windows Server 2003, Microsoft Windows Server 2008, Microsoft Windows Vista, Microsoft Windows Xp.

How do I fix CVE-2011-3416?

No fix has been published for CVE-2011-3416 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2011-3416 being exploited?

There is no known exploitation of CVE-2011-3416 in the wild and no public exploit code.

All Microsoft Windows 7 vulnerabilities

Sources

Also known as GHSA-fqwg-5wxg-6mp3.

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