Gentoo: GLSA-201701-74 Normal: libpng Remote Execution of Arbitrary Code
gentoo
January 29, 2017
A null pointer dereference in libpng might allow remote attackers to execute arbitrary code.
Summary
A null pointer dereference was discovered in libpng in the png_push_save_buffer function. In order to be vulnerable, an application has to load a text chunk into the PNG structure, then delete all text, then add another text chunk to the same PNG structure, which seems to be an unlikely sequence, but it is possible.
Topics Covered
Resolution
All libpng 1.6.x users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=media-libs/libpng-1.6.27"
All libpng 1.5.x users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=media-libs/libpng-1.5.28:1.5"
All libpng 1.2.x users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=media-libs/libpng-1.2.57:1.2"
All libpng 1.5.x users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=media-libs/libpng-1.5.28:1.5"
All libpng 1.2.x users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=media-libs/libpng-1.2.57:1.2"
References
[ 1 ] CVE-2016-10087 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-10087
Availability
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/201701-74
style>.gentoo_availability{display:block;}
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.
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Severity: Normal
Title: libpng: Remote execution of arbitrary code
Date: January 29, 2017
Bugs: #604082
ID: 201701-74
Topics Covered
Background
libpng is a standard library used to process PNG (Portable Network
Graphics) images. It is used by several programs, including web
browsers and potentially server processes.
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Affected Packages
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 media-libs/libpng < 1.6.27 >= 1.6.27
>= 1.5.28
>= 1.2.57
Impact
=====
A remote attacker, by enticing a user to process a specially crafted
PNG file, could execute arbitrary code with the privileges of the
process.
Workaround
There is no known workaround at this time.
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