---
title: "CVE-2013-6401\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-2013-6401?format=md
keywords: index, follow
---

# CVE-2013-6401

Publication date 21 March 2014

Last updated 24 July 2024

---

Ubuntu priority

**Medium**

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

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## Description

Jansson, possibly 2.4 and earlier, does not restrict the ability to trigger
hash collisions predictably, which allows context-dependent attackers to
cause a denial of service (CPU consumption) via a crafted JSON document.

### From the Ubuntu Security Team

Florian Weimer discovered that Jansson incorrectly handled hash
collisions predictability. An attacker could possibly use this issue to
cause a denial of service.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| jansson | 18.04 LTS bionic | Not affected |
| 17.10 artful | Not affected |
| 17.04 zesty | Not affected |
| 16.10 yakkety | Not affected |
| 16.04 LTS xenial | Not affected |
| 15.10 wily | Not affected |
| 15.04 vivid | Not affected |
| 14.10 utopic | Not affected |
| 14.04 LTS trusty | Fixed 2.5-2ubuntu0.1 |
| 13.10 saucy | Ignored end of life |
| 12.10 quantal | Ignored end of life |
| 12.04 LTS precise | Ignored end of life |
| 10.04 LTS lucid | 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)
* [Patch details](https://ubuntu.com/security/CVE-2013-6401?format=md#patch-details)

### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| jansson | * Upstream:   [8f80c2d](https://github.com/akheron/jansson/commit/8f80c2d83808150724d31793e6ade92749b1faa4) * Upstream:   [42016a3](https://github.com/akheron/jansson/commit/42016a35c8907e477be73b0b5d06cc09af231ee4) |

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-6401)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2013-6401)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2013-6401)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2013-6401)

### Other references

* <http://www.openwall.com/lists/oss-security/2014/02/11/7>
* <https://www.cve.org/CVERecord?id=CVE-2013-6401>