CVE-2012-3406 Information

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.

Reference

http://rhn.redhat.com/errata/RHSA-2012-1097.html http://rhn.redhat.com/errata/RHSA-2012-1098.html http://rhn.redhat.com/errata/RHSA-2012-1185.html http://rhn.redhat.com/errata/RHSA-2012-1200.html http://www.openwall.com/lists/oss-security/2012/07/11/17 http://www.ubuntu.com/usn/USN-1589-1 https://bugzilla.redhat.com/attachment.cgi?id=594722 https://bugzilla.redhat.com/show_bug.cgi?id=826943 https://security.gentoo.org/glsa/201503-04