--- title: "CVE-2006-0056\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-2006-0056?format=md keywords: index, follow --- # CVE-2006-0056 Publication date 13 February 2006 Last updated 17 July 2025 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) Toggle side navigation ## Description Double free vulnerability in the authentication and authentication token alteration code in PAM-MySQL 0.6.x before 0.6.2 and 0.7.x before 0.7pre3 allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via crafted passwords, which lead to a double free of a pointer that was created by the pam\_get\_item function. NOTE: this issue only occurs in certain configurations in which there are multiple PAM modules, PAM-MySQL is not evaluated first, and there are no requisite modules before PAM-MySQL. ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | pam-mysql | 7.04 feisty | Fixed 0.6.2-1 | | 6.10 edgy | Fixed 0.6.2-1 | | 6.06 LTS dapper | Fixed 0.6.2-1 | --- * [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) * [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses) ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0056) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2006-0056) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2006-0056) * [Debian](https://security-tracker.debian.org/tracker/CVE-2006-0056) ### Other references *