---
title: "CVE-2013-4242\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-2013-4242?format=md
keywords: index, follow
---

# CVE-2013-4242

Publication date 29 July 2013

Last updated 24 July 2024

---

Ubuntu priority

**Medium**

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

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## Description

GnuPG before 1.4.14, and Libgcrypt before 1.5.3 as used in GnuPG 2.0.x and
possibly other products, allows local users to obtain private RSA keys via
a cache side-channel attack involving the L3 cache, aka Flush+Reload.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| gnupg | 13.04 raring | Fixed 1.4.12-7ubuntu1.1 |
| 12.10 quantal | Fixed 1.4.11-3ubuntu4.2 |
| 12.04 LTS precise | Fixed 1.4.11-3ubuntu2.3 |
| 10.04 LTS lucid | Fixed 1.4.10-2ubuntu1.3 |
| libgcrypt11 | 13.04 raring | Fixed 1.5.0-3ubuntu2.2 |
| 12.10 quantal | Fixed 1.5.0-3ubuntu1.1 |
| 12.04 LTS precise | Fixed 1.5.0-3ubuntu0.2 |
| 10.04 LTS lucid | Fixed 1.4.4-5ubuntu2.2 |

---

* [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-2013-4242?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 |
| --- | --- |
| gnupg | * Vendor:   <http://www.debian.org/security/2013/dsa-2730> * Upstream:   <http://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=commit;h=35646689f4b80955ff7dbe1687bf2c479c53421e> |
| libgcrypt11 | * Vendor:   <http://www.debian.org/security/2013/dsa-2731> * Upstream:   <http://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=287bf0e543f244d784cf8b58340bf0ab3c6aba97> |

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4242)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2013-4242)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2013-4242)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2013-4242)

### Related Ubuntu Security Notices (USN)

+ [USN-1923-1](https://usn.ubuntu.com/USN-1923-1)
+ GnuPG, Libgcrypt vulnerability
+ 1 August 2013

### Other references

* <http://lists.gnupg.org/pipermail/gnupg-announce/2013q3/000330.html>
* <http://lists.gnupg.org/pipermail/gnupg-announce/2013q3/000329.html>
* <http://eprint.iacr.org/2013/448>
* <https://www.cve.org/CVERecord?id=CVE-2013-4242>