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.
Weaknesses in this category are related to the management of permissions, privileges, and other security features that are used to perform access control.
| Link | Tags |
|---|---|
| http://rhn.redhat.com/errata/RHSA-2012-1200.html | vendor advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=826943 | |
| http://rhn.redhat.com/errata/RHSA-2012-1097.html | vendor advisory |
| https://security.gentoo.org/glsa/201503-04 | vendor advisory |
| http://rhn.redhat.com/errata/RHSA-2012-1098.html | vendor advisory |
| http://www.ubuntu.com/usn/USN-1589-1 | vendor advisory |
| http://rhn.redhat.com/errata/RHSA-2012-1185.html | vendor advisory |
| http://www.openwall.com/lists/oss-security/2012/07/11/17 | mailing list |
| https://bugzilla.redhat.com/attachment.cgi?id=594722 |