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CVE-2012-3406

Publication date 13 July 2012

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
eglibc 12.04 LTS precise
Fixed 2.15-0ubuntu10.2
11.10 oneiric
Fixed 2.13-20ubuntu5.2
11.04 natty
Fixed 2.13-0ubuntu13.2
10.04 LTS lucid
Fixed 2.11.1-0ubuntu7.11
8.04 LTS hardy Not in release
glibc 12.04 LTS precise Not in release
11.10 oneiric Not in release
11.04 natty Not in release
10.04 LTS lucid Not in release
8.04 LTS hardy
Fixed 2.7-10ubuntu8.2

Notes

sbeattie

bug23-3.c from redhat patch does seem to reproduce issue on all releases