---
title: "CVE-2014-3660\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-2014-3660?format=md
keywords: index, follow
---

# CVE-2014-3660

Publication date 16 October 2014

Last updated 24 July 2024

---

Ubuntu priority

**Medium**

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

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## Description

parser.c in libxml2 before 2.9.2 does not properly prevent entity expansion
even when entity substitution has been disabled, which allows
context-dependent attackers to cause a denial of service (CPU consumption)
via a crafted XML document containing a large number of nested entity
references, a variant of the "billion laughs" attack.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| libxml2 | 14.10 utopic | Fixed 2.9.1+dfsg1-4ubuntu1 |
| 14.04 LTS trusty | Fixed 2.9.1+dfsg1-3ubuntu4.4 |
| 12.04 LTS precise | Fixed 2.7.8.dfsg-5.1ubuntu4.11 |
| 10.04 LTS lucid | Fixed 2.7.6.dfsg-1ubuntu1.15 |

---

* [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-2014-3660?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 |
| --- | --- |
| libxml2 | * Upstream:   [?id=a3f](https://git.gnome.org/browse/libxml2/commit/?id=a3f1e3e5712257fd279917a9158278534e8f4b72) * Upstream:   [?id=cff](https://git.gnome.org/browse/libxml2/commit/?id=cff2546f13503ac028e4c1f63c7b6d85f2f2d777) * Upstream:   [?id=be2](https://git.gnome.org/browse/libxml2/commit/?id=be2a7edaf289c5da74a4f9ed3a0b6c733e775230) |

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3660)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2014-3660)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2014-3660)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2014-3660)

### Related Ubuntu Security Notices (USN)

+ [USN-2389-1](https://usn.ubuntu.com/USN-2389-1)
+ libxml2 vulnerability
+ 27 October 2014

### Other references

* <https://rhn.redhat.com/errata/RHSA-2014-1655.html>
* <https://www.cve.org/CVERecord?id=CVE-2014-3660>