[security-announce] Security Update : CVE-2015-5156: Kernel (linux-hierofalcon-4.1 and linux-hierofalcon 3.19)

Sona Sarmadi sona.sarmadi at enea.com
Thu Jan 28 14:45:58 CET 2016


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Enea Linux Security Advisory

=========================================================
Product/package: kernel (linux-hierofalcon-4.1 &linux-hierofalcon 3.19)
Severity: Medium
CVE Name: CVE-2015-5156
Layer: meta-hierofalcon
=========================================================

This security update fixes a buffer overflow flaw in the Linux kernel's
virtio-net subsystem.


Description
===========
The virtnet_probe function in drivers/net/virtio_net.c in the Linux
kernel before 4.2 attempts to support a FRAGLIST feature without
proper memory allocation, which allows guest OS users to cause a
denial of service (buffer overflow and memory corruption) via a
crafted sequence of fragmented packets.

References:
===========
http://www.openwall.com/lists/oss-security/2015/08/06/1
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-5156

Reference to the upstream patch:
===============================
http://marc.info/?l=linux-netdev&m=143868216724068&w=2

Correction for Enea Linux
=========================
http://git.enea.com/cgit/linux/meta-hierofalcon.git/patch/?id=febcbabc2e
4d859a3caf7808ceda68c956da652f

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

cd Enea-Linux-5.0/poky/meta-hierofalcon
git pull

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

mkdir Enea-Linux-5.0
git -C Enea-Linux-5.0 clone -b dizzy git://git.enea.com/linux/poky.git
POKY=Enea-Linux-5.0/poky
git -C $POKY clone -b dizzy git://git.enea.com/linux/meta-enea.git
git -C $POKY clone -b dizzy git://git.enea.com/linux/meta-
hierofalcon.git
git -C $POKY clone -b dizzy git://git.enea.com/linux/meta-linaro.git
git -C $POKY clone -b dizzy git://git.enea.com/linux/meta-
openembedded.git
git -C $POKY clone -b
dizzygit://git.enea.com/linux/meta-virtualization.git
git -C $POKY/meta-enea clone -b dizzy
git://git.enea.com/linux/meta-enea/meta-vt.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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