Twenty Year Anniversary

Gentoo Linux Security Advisory 201810-04

Gentoo Linux Security Advisory 201810-04
Posted Oct 7, 2018
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201810-4 - Due to multiple vulnerabilities in various coders used by ImageMagick, Gentoo Linux now installs a policy.xml file which will restrict coder usage by default. Versions less than 6.9.10.10-r1 are affected.

tags | advisory, vulnerability
systems | linux, gentoo
MD5 | 95850d0611272ec82d807c6ccd77ce60

Gentoo Linux Security Advisory 201810-04

Change Mirror Download
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory GLSA 201810-04
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
https://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Severity: Normal
Title: ImageMagick: Security hardening
Date: October 06, 2018
Bugs: #664236
ID: 201810-04

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========

Due to multiple vulnerabilities in various coders used by ImageMagick,
Gentoo Linux now installs a policy.xml file which will restrict coder
usage by default.

Background
==========

ImageMagick is a collection of tools and libraries for many image
formats.

Affected packages
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 media-gfx/imagemagick < 6.9.10.10-r1 >= 6.9.10.10-r1
< 7.0.8.10-r1 >= 7.0.8.10-r1

Description
===========

If you process an image with ImageMagick and don't validate the file
before (e.g. check magic byte), ImageMagick will call any coders found
in the given file. So if ImageMagick will find Ghostscript for example,
it will call Ghostscript.

Due to multiple -dSAFER sandbox bypass vulnerabilities in Ghostscript,
this can lead to arbitrary code execution.

To mitigate this problem we install a policy.xml file by default which
will disable PS, EPS, PDF, and XPS coders.

Impact
======

A remote attacker, by enticing a user to process a specially crafted
image file, could execute arbitrary code with the privileges of the
process or cause a Denial of Service condition.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All ImageMagick 6 users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot -v ">=media-gfx/imagemagick-6.9.10.10-r1"

All ImageMagick 7 users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot -v ">=media-gfx/imagemagick-7.0.8.10-r1"

References
==========

[ 1 ] Ghostscript contains multiple -dSAFER sandbox bypass
vulnerabilities (VU#332928)
https://www.kb.cert.org/vuls/id/332928

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

https://security.gentoo.org/glsa/201810-04

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2018 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.5

Comments

RSS Feed Subscribe to this comment feed

No comments yet, be the first!

Login or Register to post a comment

File Archive:

October 2018

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Oct 1st
    26 Files
  • 2
    Oct 2nd
    15 Files
  • 3
    Oct 3rd
    15 Files
  • 4
    Oct 4th
    15 Files
  • 5
    Oct 5th
    15 Files
  • 6
    Oct 6th
    2 Files
  • 7
    Oct 7th
    3 Files
  • 8
    Oct 8th
    23 Files
  • 9
    Oct 9th
    16 Files
  • 10
    Oct 10th
    15 Files
  • 11
    Oct 11th
    19 Files
  • 12
    Oct 12th
    16 Files
  • 13
    Oct 13th
    2 Files
  • 14
    Oct 14th
    2 Files
  • 15
    Oct 15th
    15 Files
  • 16
    Oct 16th
    20 Files
  • 17
    Oct 17th
    19 Files
  • 18
    Oct 18th
    21 Files
  • 19
    Oct 19th
    16 Files
  • 20
    Oct 20th
    0 Files
  • 21
    Oct 21st
    0 Files
  • 22
    Oct 22nd
    0 Files
  • 23
    Oct 23rd
    0 Files
  • 24
    Oct 24th
    0 Files
  • 25
    Oct 25th
    0 Files
  • 26
    Oct 26th
    0 Files
  • 27
    Oct 27th
    0 Files
  • 28
    Oct 28th
    0 Files
  • 29
    Oct 29th
    0 Files
  • 30
    Oct 30th
    0 Files
  • 31
    Oct 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2018 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close