CVE-2012-3406

Name	CVE-2012-3406
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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-165-1, DSA-3169-1
Debian Bugs	681888

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
glibc (PTS)	bullseye	2.31-13+deb11u11	fixed
	bullseye (security)	2.31-13+deb11u10	fixed
	bookworm	2.36-9+deb12u9	fixed
	bookworm (security)	2.36-9+deb12u7	fixed
	sid, trixie	2.40-4	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
eglibc	source	squeeze	2.11.3-4+deb6u5		DLA-165-1
eglibc	source	wheezy	2.13-38+deb7u8		DSA-3169-1
eglibc	source	(unstable)	(unfixed)
glibc	source	(unstable)	2.19-14	low		681888

Notes

Upstream fix: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=5985c6ea868db23380977a35a2167549f9a3653b
https://bugzilla.redhat.com/show_bug.cgi?id=826943
https://www.openwall.com/lists/oss-security/2012/07/11/5
https://www.openwall.com/lists/oss-security/2012/07/11/17