[arch-security] [ASA-201412-21] glibc: arbitrary code execution
anthraxx at archlinux.org
Fri Dec 19 01:45:20 UTC 2014
Arch Linux Security Advisory ASA-201412-21
Date : 2014-12-18
CVE-ID : CVE-2012-3406 CVE-2014-9402
Package : glibc lib32-glibc
Type : arbitrary code execution, denial of service
Remote : Yes
Link : https://wiki.archlinux.org/index.php/CVE-2014
The packages glibc and lib32-glibc before version 2.20-5 are vulnerable
to arbitrary code execution and denial of service.
Upgrade to 2.20-5.
# pacman -Syu "glibc>=2.20-5"
# pacman -Syu "lib32-glibc>=2.20-5"
The problems have been fixed upstream but no release is available yet.
- CVE-2012-3406 (arbitrary code execution)
The vfprintf function in stdio-common/vfprintf.c in GNU C Library 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.
- CVE-2014-9402 (denial of service)
The nss_dns getnetbyname function will enter an infinite loop if the DNS
backend is activated in the system Name Service Switch configuration and
the DNS resolver receives a positive answer while processing the network
An attacker is able to perform a denial of service attack or execute
arbitrary code via crafted format strings.
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