CVE-2012-3406
Medium
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.
SeverityMedium
CVSS6.8
Exploit probability—
Product
Gnu Glibc
PublishedFeb 10, 2014
First seenFeb 10, 2014
How to fix
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gnu glibc | 2.5, 2.12 | — |
| redhat enterprise_virtualization | 3.0 | — |
| canonical ubuntu_linux | 8.04, 10.04, 11.04, 11.10, 12.04 | — |
| redhat enterprise_linux | 5, 6.0 | — |
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