CVE-2012-3406: canonical ubuntu_linux

Vulnerability summary

CVE-2012-3406 is a medium (CVSS 6.8) vulnerability in canonical ubuntu_linux. EPSS estimates a 3.16% chance of exploitation in the next 30 days, higher than 88% of scored vulnerabilities.

Timeline

1. 10-02-2014
   PublishedVulnerability first disclosed.
2. 06-08-2024
   Last modifiedVulnerability information updated.

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.

• CWE-264Permissions, Privileges, and Access ControlsWeaknesses in this category are related to the management of permissions, privileges, and other security features that are used to perform access control.