--- title: 'USN-2983-1: Expat vulnerability | 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-2983-1 --- 1. [Ubuntu Security Notices](https://ubuntu.com/security/notices) 2. USN-2983-1 --- # USN-2983-1: Expat vulnerability Publication date 18 May 2016 Overview Expat could be made to crash or run programs as your login if it opened a specially crafted file. Releases [16.04 LTS](https://ubuntu.com/security/notices?release=xenial) [15.10](https://ubuntu.com/security/notices?release=wily) [14.04 LTS](https://ubuntu.com/security/notices?release=trusty) [12.04](https://ubuntu.com/security/notices?release=precise) --- Open side navigation ## Packages * [expat](https://ubuntu.com/security/cves?package=expat) - XML parsing C library ## Details Gustavo Grieco discovered that Expat incorrectly handled malformed XML data. If a user or application linked against Expat were tricked into opening a crafted XML file, an attacker could cause a denial of service, or possibly execute arbitrary code. ([CVE-2016-0718](https://ubuntu.com/security/CVE-2016-0718)) ## Update instructions After a standard system upgrade you need to restart any applications linked against Expat to effect 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 | | --- | --- | | 16.04 LTS xenial | [lib64expat1](https://launchpad.net/ubuntu/+source/expat) –  [2.1.0-7ubuntu0.16.04.1](https://launchpad.net/ubuntu/+source/expat/2.1.0-7ubuntu0.16.04.1) | | | | [libexpat1](https://launchpad.net/ubuntu/+source/expat) –  [2.1.0-7ubuntu0.16.04.1](https://launchpad.net/ubuntu/+source/expat/2.1.0-7ubuntu0.16.04.1) | | | | 15.10 wily | [lib64expat1](https://launchpad.net/ubuntu/+source/expat) –  [2.1.0-7ubuntu0.15.10.1](https://launchpad.net/ubuntu/+source/expat/2.1.0-7ubuntu0.15.10.1) | | | | [libexpat1](https://launchpad.net/ubuntu/+source/expat) –  [2.1.0-7ubuntu0.15.10.1](https://launchpad.net/ubuntu/+source/expat/2.1.0-7ubuntu0.15.10.1) | | | | 14.04 LTS trusty | [lib64expat1](https://launchpad.net/ubuntu/+source/expat) –  [2.1.0-4ubuntu1.2](https://launchpad.net/ubuntu/+source/expat/2.1.0-4ubuntu1.2) | | | | [libexpat1](https://launchpad.net/ubuntu/+source/expat) –  [2.1.0-4ubuntu1.2](https://launchpad.net/ubuntu/+source/expat/2.1.0-4ubuntu1.2) | | | | 12.04 precise | [lib64expat1](https://launchpad.net/ubuntu/+source/expat) –  [2.0.1-7.2ubuntu1.3](https://launchpad.net/ubuntu/+source/expat/2.0.1-7.2ubuntu1.3) | | | | [libexpat1](https://launchpad.net/ubuntu/+source/expat) –  [2.0.1-7.2ubuntu1.3](https://launchpad.net/ubuntu/+source/expat/2.0.1-7.2ubuntu1.3) | | | --- ### 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-2016-0718](https://ubuntu.com/security/CVE-2016-0718) ## Related notices * [USN-7199-1](https://ubuntu.com/security/notices/USN-7199-1) * [USN-5455-1](https://ubuntu.com/security/notices/USN-5455-1) * [USN-3044-1](https://ubuntu.com/security/notices/USN-3044-1) * [USN-3013-1](https://ubuntu.com/security/notices/USN-3013-1)