--- title: 'USN-646-1: rdesktop 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-646-1 --- 1. [Ubuntu Security Notices](https://ubuntu.com/security/notices) 2. USN-646-1 --- # USN-646-1: rdesktop vulnerabilities Publication date 18 September 2008 Overview rdesktop vulnerabilities Releases [8.04](https://ubuntu.com/security/notices?release=hardy) [7.10](https://ubuntu.com/security/notices?release=gutsy) [7.04](https://ubuntu.com/security/notices?release=feisty) [6.06](https://ubuntu.com/security/notices?release=dapper) --- Open side navigation ## Packages * [rdesktop](https://ubuntu.com/security/cves?package=rdesktop) - ## Details It was discovered that rdesktop did not properly validate the length of packet headers when processing RDP requests. If a user were tricked into connecting to a malicious server, an attacker could cause a denial of service or possible execute arbitrary code with the privileges of the user. ([CVE-2008-1801](https://ubuntu.com/security/CVE-2008-1801)) Multiple buffer overflows were discovered in rdesktop when processing RDP redirect requests. If a user were tricked into connecting to a malicious server, an attacker could cause a denial of service or possible execute arbitrary code with the privileges of the user. ([CVE-2008-1802](https://ubuntu.com/security/CVE-2008-1802)) It was discovered that rdesktop performed a signed integer comparison when reallocating dynamic buffers which could result in a heap-based overflow. If a user were tricked into connecting to a malicious server, an attacker could cause a denial of service or... --- Show more ## Update instructions In general, a standard system upgrade is sufficient 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 | | --- | --- | | 8.04 hardy | [rdesktop](https://launchpad.net/ubuntu/+source/rdesktop) –  [1.5.0-3+cvs20071006ubuntu0.1](https://launchpad.net/ubuntu/+source/rdesktop/1.5.0-3+cvs20071006ubuntu0.1) | | | | 7.10 gutsy | [rdesktop](https://launchpad.net/ubuntu/+source/rdesktop) –  [1.5.0-2ubuntu0.1](https://launchpad.net/ubuntu/+source/rdesktop/1.5.0-2ubuntu0.1) | | | | 7.04 feisty | [rdesktop](https://launchpad.net/ubuntu/+source/rdesktop) –  [1.5.0-1ubuntu1.1](https://launchpad.net/ubuntu/+source/rdesktop/1.5.0-1ubuntu1.1) | | | | 6.06 dapper | [rdesktop](https://launchpad.net/ubuntu/+source/rdesktop) –  [1.4.1-1.1ubuntu0.6.06.1](https://launchpad.net/ubuntu/+source/rdesktop/1.4.1-1.1ubuntu0.6.06.1) | | | --- ### 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-2008-1803](https://ubuntu.com/security/CVE-2008-1803) * [CVE-2008-1802](https://ubuntu.com/security/CVE-2008-1802) * [CVE-2008-1801](https://ubuntu.com/security/CVE-2008-1801)