---
title: "CVE-2013-4154\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-2013-4154?format=md
keywords: index, follow
---

# CVE-2013-4154

Publication date 30 September 2013

Last updated 24 July 2024

---

Ubuntu priority

**Medium**

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

Toggle side navigation

## Description

The qemuAgentCommand function in libvirt before 1.1.1, when a guest agent
is not configured, allows remote attackers to cause a denial of service
(NULL pointer dereference and crash) via vectors related to "agent based
cpu (un)plug," as demonstrated by the "virsh vcpucount foobar --guest"
command.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2013-4154?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| libvirt | 13.04 raring | Not affected |
| 12.10 quantal | Not affected |
| 12.04 LTS precise | Not affected |
| 10.04 LTS lucid | Not affected |

---

* [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-2013-4154?format=md#patch-details)

## Notes

---

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

Introduced by:
http://libvirt.org/git/?p=libvirt.git;a=commitdiff;h=d47eff88fe50e43a36671f6d8d0eeda52835d5e0
which is in 1.1.0

### 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 |
| --- | --- |
| libvirt | * Upstream:   <http://libvirt.org/git/?p=libvirt.git;a=commit;h=96518d4316b711c72205117f8d5c967d5127bbb6> |

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4154)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2013-4154)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2013-4154)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2013-4154)

### Other references

* <http://openwall.com/lists/oss-security/2013/07/19/12>
* <https://www.redhat.com/archives/libvir-list/2013-July/msg00992.html>
* <https://bugzilla.redhat.com/show_bug.cgi?id=986386>
* <https://www.cve.org/CVERecord?id=CVE-2013-4154>