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CVE-2012-3406

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" th…

Impact

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.

Affected products

VendorProductAffected versions
GnuGlibc
Versions 2.5, 2.12
RedhatEnterprise Virtualization
Version 3.0
CanonicalUbuntu Linux
Versions 8.04, 10.04, 11.04, 11.10, 12.04
RedhatEnterprise Linux
Versions 5, 6.0

Weakness classification

CWE-264

References