--- title: 'USN-2555-1: Libgcrypt vulnerabilities | Ubuntu security notices' 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/notices/USN-2555-1 --- 1. [Ubuntu Security Notices](https://ubuntu.com/security/notices) 2. USN-2555-1 --- # USN-2555-1: Libgcrypt vulnerabilities Publication date 1 April 2015 Overview Several security issues were fixed in Libgcrypt. Releases [14.10](https://ubuntu.com/security/notices?release=utopic) [14.04 LTS](https://ubuntu.com/security/notices?release=trusty) [12.04](https://ubuntu.com/security/notices?release=precise) [10.04](https://ubuntu.com/security/notices?release=lucid) --- Open side navigation ## Packages * [libgcrypt11](https://ubuntu.com/security/cves?package=libgcrypt11) - LGPL Crypto library * [libgcrypt20](https://ubuntu.com/security/cves?package=libgcrypt20) - LGPL Crypto library ## Details Daniel Genkin, Lev Pachmanov, Itamar Pipman, and Eran Tromer discovered that Libgcrypt was susceptible to an attack via physical side channels. A local attacker could use this attack to possibly recover private keys. ([CVE-2014-3591](https://ubuntu.com/security/CVE-2014-3591)) Daniel Genkin, Adi Shamir, and Eran Tromer discovered that Libgcrypt was susceptible to an attack via physical side channels. A local attacker could use this attack to possibly recover private keys. ([CVE-2015-0837](https://ubuntu.com/security/CVE-2015-0837)) ## Update instructions In general, a standard system update will make all the necessary changes. [Learn more about how to get the fixes.](https://ubuntu.com/security/cves/about#security) The problem can be corrected by updating your system to the following package versions: | Ubuntu Release | Package Version | | --- | --- | | 14.10 utopic | [libgcrypt11](https://launchpad.net/ubuntu/+source/libgcrypt11) –  [1.5.4-2ubuntu1.1](https://launchpad.net/ubuntu/+source/libgcrypt11/1.5.4-2ubuntu1.1) | | | | [libgcrypt20](https://launchpad.net/ubuntu/+source/libgcrypt20) –  [1.6.1-2ubuntu1.14.10.1](https://launchpad.net/ubuntu/+source/libgcrypt20/1.6.1-2ubuntu1.14.10.1) | | | | 14.04 LTS trusty | [libgcrypt11](https://launchpad.net/ubuntu/+source/libgcrypt11) –  [1.5.3-2ubuntu4.2](https://launchpad.net/ubuntu/+source/libgcrypt11/1.5.3-2ubuntu4.2) | | | | 12.04 precise | [libgcrypt11](https://launchpad.net/ubuntu/+source/libgcrypt11) –  [1.5.0-3ubuntu0.4](https://launchpad.net/ubuntu/+source/libgcrypt11/1.5.0-3ubuntu0.4) | | | | 10.04 lucid | [libgcrypt11](https://launchpad.net/ubuntu/+source/libgcrypt11) –  [1.4.4-5ubuntu2.4](https://launchpad.net/ubuntu/+source/libgcrypt11/1.4.4-5ubuntu2.4) | | | --- ### Reduce your security exposure Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines. [Get Ubuntu Pro](https://ubuntu.com/pro) ## References * [CVE-2015-0837](https://ubuntu.com/security/CVE-2015-0837) * [CVE-2014-3591](https://ubuntu.com/security/CVE-2014-3591) ## Related notices * [USN-2554-1](https://ubuntu.com/security/notices/USN-2554-1)