--- title: "CVE-2012-3406\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-2012-3406?format=md keywords: index, follow --- # CVE-2012-3406 Publication date 13 July 2012 Last updated 24 July 2024 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) Toggle side navigation ## Description The vfprintf function in stdio-common/vfprintf.c in GNU C Library (aka glibc) 2.5, 2.12, and probably other versions does not "properly restrict the use of" the alloca function when allocating the SPECS array, which allows context-dependent attackers to bypass the FORTIFY\_SOURCE format-string protection mechanism and cause a denial of service (crash) or possibly execute arbitrary code via a crafted format string using positional parameters and a large number of format specifiers, a different vulnerability than CVE-2012-3404 and CVE-2012-3405. [Read the notes from the security team](https://ubuntu.com/security/CVE-2012-3406?format=md#notes) ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | eglibc | 12.04 LTS precise | Fixed 2.15-0ubuntu10.2 | | 11.10 oneiric | Fixed 2.13-20ubuntu5.2 | | 11.04 natty | Fixed 2.13-0ubuntu13.2 | | 10.04 LTS lucid | Fixed 2.11.1-0ubuntu7.11 | | 8.04 LTS hardy | Not in release | | glibc | 12.04 LTS precise | Not in release | | 11.10 oneiric | Not in release | | 11.04 natty | Not in release | | 10.04 LTS lucid | Not in release | | 8.04 LTS hardy | Fixed 2.7-10ubuntu8.2 | --- * [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) * [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses) ## Notes --- ### [sbeattie](https://launchpad.net/~sbeattie) bug23-3.c from redhat patch does seem to reproduce issue on all releases ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-3406) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2012-3406) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2012-3406) * [Debian](https://security-tracker.debian.org/tracker/CVE-2012-3406) ### Related Ubuntu Security Notices (USN) + [USN-1589-1](https://usn.ubuntu.com/USN-1589-1) + GNU C Library vulnerabilities + 2 October 2012 ### Other references * * * * * *