---
title: "CVE-2012-5370\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2012-5370?format=md
keywords: index, follow
---

# CVE-2012-5370

Publication date 28 November 2012

Last updated 24 July 2024

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

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## Description

JRuby computes hash values without properly restricting the ability to
trigger hash collisions predictably, which allows context-dependent
attackers to cause a denial of service (CPU consumption) via crafted input
to an application that maintains a hash table, as demonstrated by a
universal multicollision attack against the MurmurHash2 algorithm, a
different vulnerability than CVE-2011-4838.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| jruby | 17.04 zesty | Not affected |
| 16.10 yakkety | Fixed 1.7.19-1 |
| 16.04 LTS xenial | Fixed 1.7.19-1 |
| 15.10 wily | Ignored end of life |
| 15.04 vivid | Ignored end of life |
| 14.10 utopic | Ignored end of life |
| 14.04 LTS trusty | Fixed 1.5.6-5 |
| 13.10 saucy | Ignored end of life |
| 13.04 raring | Ignored end of life |
| 12.10 quantal | Ignored end of life |
| 12.04 LTS precise | Ignored end of life |
| 11.10 oneiric | Ignored end of life |
| 10.04 LTS lucid | Ignored end of life |
| 8.04 LTS hardy | Not in release |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-5370)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2012-5370)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2012-5370)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2012-5370)

### Other references

* <https://www.131002.net/data/talks/appsec12_slides.pdf>
* <https://bugzilla.redhat.com/show_bug.cgi?id=880671>
* <http://www.ocert.org/advisories/ocert-2012-001.html>
* <http://asfws12.files.wordpress.com/2012/11/asfws2012-jean_philippe_aumasson-martin_bosslet-hash_flooding_dos_reloaded.pdf>
* <http://2012.appsec-forum.ch/conferences/#c17>
* <https://www.cve.org/CVERecord?id=CVE-2012-5370>