[security-announce] Security Update: linux-hierofalcon 3.1 &, linux-hierofalcon 4.1: CVE-2015-8374

Sona Sarmadi sona.sarmadi at enea.com
Thu Apr 7 09:19:08 CEST 2016


	Enea Linux Security Advisory

=========================================================
Product/package: kernel (linux-hierofalcon 3.19 /
linux-hierofalcon 4.1) /Enea Linux 5.0
Severity: Medium
CVE Name: CVE-2015-8374
Layer: meta-hierofalcon
=========================================================

This update fixes an information-leak vulnerability in the kernel when
it truncated a file to a smaller size which consisted of an inline
extent that was compressed. A caller of the clone ioctl could exploit
this flaw by using only standard file-system operations without root
access to read the truncated data.

Description
===========
fs/btrfs/inode.c in the Linux kernel before 4.3.3 mishandles
compressed inline extents, which allows local users to obtain
sensitive pre-truncation information from a file via a clone action.

References:
===========
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8374
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2015-8374

Reference to the upstream fixes:
===============================
https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/
patch/?id=f1008f6d21ec52d533f7473e2e46218408fb4580

Correction for Enea Linux
=========================
http://git.enea.com/cgit/linux/meta-hierofalcon.git/patch/?id=291c45aaebb29078e32ff38f7b9998fd9fdfe167


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

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-fsl-ppc.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 dizzy
git://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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