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.

References

http://rhn.redhat.com/errata/RHSA-2012-1097.html

http://rhn.redhat.com/errata/RHSA-2012-1098.html

http://rhn.redhat.com/errata/RHSA-2012-1185.html

http://rhn.redhat.com/errata/RHSA-2012-1200.html

http://www.openwall.com/lists/oss-security/2012/07/11/17

http://www.ubuntu.com/usn/USN-1589-1

https://bugzilla.redhat.com/attachment.cgi?id=594722

https://bugzilla.redhat.com/show_bug.cgi?id=826943

https://security.gentoo.org/glsa/201503-04

Details

Source: MITRE

Published: 2014-02-10

Updated: 2019-04-22

Type: CWE-264

Risk Information

CVSS v2.0

Base Score: 6.8

Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 8.6

Severity: MEDIUM