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CVE-2012-3406

Public on 2012-07-25
Modified on 2014-09-14
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.

Severity
Medium
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CVSS v3 Base Score
6.8
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 glibc 2012-07-25 17:56 ALAS-2012-109

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv2 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P
NVD CVSSv2 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P