---
title: "CVE-2013-1917\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-2013-1917?format=md
keywords: index, follow
---

# CVE-2013-1917

Publication date 13 May 2013

Last updated 24 July 2024

---

Ubuntu priority

**Medium**

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

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## Description

Xen 3.1 through 4.x, when running 64-bit hosts on Intel CPUs, does not
clear the NT flag when using an IRET after a SYSENTER instruction, which
allows PV guest users to cause a denial of service (hypervisor crash) by
triggering a #GP fault, which is not properly handled by another IRET
instruction.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2013-1917?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| xen | 13.10 saucy | Fixed 4.2.1-0ubuntu3.1 |
| 13.04 raring | Fixed 4.2.1-0ubuntu3.1 |
| 12.10 quantal | Fixed 4.1.3-3ubuntu1.5 |
| 12.04 LTS precise | Fixed 4.1.2-2ubuntu2.8 |
| 11.10 oneiric | Ignored end of life |
| 10.04 LTS lucid | Not in release |
| 8.04 LTS hardy | Not in release |
| xen-3.1 | 13.10 saucy | Not in release |
| 13.04 raring | Not in release |
| 12.10 quantal | Not in release |
| 12.04 LTS precise | Not in release |
| 11.10 oneiric | Not in release |
| 10.04 LTS lucid | Not in release |
| 8.04 LTS hardy | Ignored end of life |
| xen-3.2 | 13.10 saucy | Not in release |
| 13.04 raring | Not in release |
| 12.10 quantal | Not in release |
| 12.04 LTS precise | Not in release |
| 11.10 oneiric | Not in release |
| 10.04 LTS lucid | Not in release |
| 8.04 LTS hardy | Ignored end of life |
| xen-3.3 | 13.10 saucy | Not in release |
| 13.04 raring | Not in release |
| 12.10 quantal | Not in release |
| 12.04 LTS precise | Not in release |
| 11.10 oneiric | Not in release |
| 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)
* [Patch details](https://ubuntu.com/security/CVE-2013-1917?format=md#patch-details)

## Notes

---

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

hypervisor packages are in universe. For
issues in the hypervisor, add appropriate
tags to each section, ex:
Tags\_xen: universe-binary

---

### [seth-arnold](https://launchpad.net/~seth-arnold)

only 64-bit paravirtualized guests on Intel CPUs

### 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 |
| --- | --- |
| xen | * Upstream:   <http://lists.xen.org/archives/html/xen-announce/2013-04/binGS8guTt3VO.bin> * Upstream:   <http://lists.xen.org/archives/html/xen-announce/2013-04/binEL_7UvL5vH.bin> * Upstream:   <http://lists.xen.org/archives/html/xen-announce/2013-04/binGlTcGmAZhQ.bin> * Upstream:   <http://lists.xen.org/archives/html/xen-announce/2013-04/binswL9iUJWNc.bin> |

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-1917)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2013-1917)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2013-1917)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2013-1917)

### Other references

* <http://lists.xen.org/archives/html/xen-announce/2013-04/msg00005.html>
* <https://www.cve.org/CVERecord?id=CVE-2013-1917>