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Gentoo: GLSA-201810-04 Normal: ImageMagick Coder Restrictions

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. [More...]. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 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 ofthe 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 This email address is being protected from spambots. You need JavaScript enabled to view it. 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/ . Gentoo Linux GLSA 201910-05 recommends enhancing security for ImageMagick due to multiple flaws. It is advised to update for protection.. ImageMagick Security Hardening,Gentoo Linux Advisory,Arbitrary Code Execution,Coder Restrictions. . LinuxSecurity.com Team

Oct 06, 2018 Gentoo