---
title: "CVE-2013-6440\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-2013-6440?format=md
keywords: index, follow
---

# CVE-2013-6440

Publication date 14 February 2014

Last updated 24 July 2024

---

Ubuntu priority

**Medium**

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

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## Description

The (1) BasicParserPool, (2) StaticBasicParserPool, (3) XML Decrypter, and
(4) SAML Decrypter in Shibboleth OpenSAML-Java before 2.6.1 set the
expandEntityReferences property to true, which allows remote attackers to
conduct XML external entity (XXE) attacks via a crafted XML DOCTYPE
declaration.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2013-6440?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| opensaml2 | 17.10 artful | Not affected |
| 17.04 zesty | Not affected |
| 16.10 yakkety | Ignored end of life |
| 16.04 LTS xenial | Not affected |
| 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 | Not in release |
| 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 |
| 10.04 LTS lucid | Ignored end of life |

---

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

## Notes

---

### [sbeattie](https://launchpad.net/~sbeattie)

debian packaging provides the C-based Shibboleth
implementation

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-6440)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2013-6440)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2013-6440)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2013-6440)

### Other references

* <http://shibboleth.net/community/advisories/secadv_20131213.txt>
* <http://blog.sendsafely.com/post/69590974866/web-based-single-sign-on-and-the-dangers-of-saml-xml>
* <https://www.cve.org/CVERecord?id=CVE-2013-6440>