[security-announce] eglibc: CVE-2015-7547: Security Update

Sona Sarmadi sona.sarmadi at enea.com
Tue Mar 1 13:46:26 CET 2016


	Enea Linux Security Advisory

=========================================================
Product/package: Enea Linux 4.0 /eglibc 2.19
Severity: High
CVE Name: CVE-2015-7547
Layer: meta
=========================================================

This security update fixes a stack-based buffer overflow in getaddrinfo.

Description:
Multiple stack-based buffer overflows in the (1) send_dg and (2)
send_vc functions in the libresolv library in the GNU C Library (aka
glibc or libc6) before 2.23 allow remote attackers to cause a denial
of service (crash) or possibly execute arbitrary code via a crafted
DNS response that triggers a call to the getaddrinfo function with the
AF_UNSPEC or AF_INET6 address family, related to performing "dual
A/AAAA DNS queries" and the libnss_dns.so.2 NSS module.

References:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7547
https://sourceware.org/bugzilla/show_bug.cgi?id=18665
https://sourceware.org/ml/libc-alpha/2016-02/msg00416.html
https://sourceware.org/ml/libc-alpha/2016-02/msg00418.html

Upstream patch:
https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff_plain;h=1
6d0a0ce7613552301786bf05d7eba8784b5732c;hp=014eaa22077fd4759083b1a4619de
d513a181f92

Correction for Enea Linux 4.0:
http://git.enea.com/cgit/linux/poky.git/patch/?id=2ffdbb90ec8e461370fd9a4d3adac2fabfefd7ee

How to get the latest patches
=============================
- If you have already cloned needed repositories, update it to get new
security patches.

cd Enea-Linux-4.0/poky
git pull

- If you have not yet cloned needed repositories, do it as described
below. (All patches are fetched implicitly when cloning the repos).

mkdir Enea-Linux-4.0
git -C Enea-Linux-4.0 clone -b daisy git://git.enea.com/linux/poky.git
POKY=Enea-Linux-4.0/poky
git -C $POKY clone -b daisy git://git.enea.com/linux/meta-enea.git
git -C $POKY clone -b daisy git://git.enea.com/linux/meta-
openembedded.git
git -C $POKY clone -b daisy git://git.enea.com/linux/meta-virtualization.git
git -C $POKY clone -b daisy git://git.enea.com/linux/meta-ti.git
git -C $POKY clone -b daisy git://git.enea.com/linux/meta-selftest.git
git -C $POKY clone -b daisy git://git.enea.com/linux/meta-eca.git
git -C $POKY clone -b daisy git://git.enea.com/linux/meta-intel.git
git -C $POKY clone -b daisy git://git.enea.com/linux/meta-fsl-ppc.git
git -C $POKY clone -b daisy git://git.enea.com/linux/meta-xilinx.git

If you have any questions regarding the security patches and security
updates please contact security at enea.com.


Enea Security Team
Sona Sarmadi
Mobile: +46 70 971 4475
www.enea.com

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