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CVE-2012-3405

The vfprintf function in stdio-common/vfprintf.c in libc in GNU C Library (aka glibc) 2.14 and other versions does not properly calculate a buffer length, whic…

Impact

The vfprintf function in stdio-common/vfprintf.c in libc in GNU C Library (aka glibc) 2.14 and other versions does not properly calculate a buffer length, which allows context-dependent attackers to bypass the FORTIFY_SOURCE format-string protection mechanism and cause a denial of service (segmentation fault and crash) via a format string with a large number of format specifiers that triggers "desynchronization within the buffer size handling," a different vulnerability than CVE-2012-3404.

Affected products

VendorProductAffected versions
GnuGlibc
Version 2.14
RedhatEnterprise Virtualization
Version 3.0
CanonicalUbuntu Linux
Versions 8.04, 10.04, 11.04, 11.10, 12.04
RedhatEnterprise Linux
Version 6.0

Weakness classification

CWE-189

References