CVE-2011-3414: Microsoft Windows 7

High severity, CVSS 7.8. EPSS: 57.7% chance of exploitation in the next 30 days.

The CaseInsensitiveHashProvider.getHashCode function in the HashTable implementation in the ASP.NET subsystem in Microsoft .NET Framework 1.1 SP1, 2.0 SP2, 3.5 SP1, 3.5.1, and 4.0 computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters, aka "Collisions in HashTable May Cause DoS Vulnerability."

Affected products

• Microsoft Windows 7: affected versions not specified
• Microsoft Windows Server 2003: any version
• Microsoft Windows Server 2008: any version; affected versions not specified; version r2 only
• Microsoft Windows Vista: any version; affected versions not specified
• Microsoft Windows XP: any version; version sp3 only

Published 2011-12-30. Last modified 2026-06-16.