Detections
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CVE-2012-3406
critical
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.
References
https://security.gentoo.org/glsa/201503-04
https://bugzilla.redhat.com/show_bug.cgi?id=826943
https://bugzilla.redhat.com/attachment.cgi?id=594722
http://www.ubuntu.com/usn/USN-1589-1
http://www.openwall.com/lists/oss-security/2012/07/11/17
http://rhn.redhat.com/errata/RHSA-2012-1200.html
http://rhn.redhat.com/errata/RHSA-2012-1185.html