SciLinux: 2015:2595-1 Moderate: libpng12 Buffer Overflow Security Issue

Date: Mon, 21 Dec 2015 23:18:30 +0000
Reply-To: scientific-linux-users@
Sender: Security Errata for Scientific Linux
 
From: Pat Riehecky 
Subject: Security ERRATA Moderate: libpng12 on SL7.x x86_64
MIME-Version: 1.0
Message-ID: <20151221231830.7116.81398@slpackages.fnal.gov>

Synopsis: Moderate: libpng12 security update
Advisory ID: SLSA-2015:2595-1
Issue Date: 2015-12-09
CVE Numbers: CVE-2015-7981
 CVE-2015-8126
 CVE-2015-8472
--

It was discovered that the png_get_PLTE() and png_set_PLTE() functions of
libpng did not correctly calculate the maximum palette sizes for bit
depths of less than 8. In case an application tried to use these functions
in combination with properly calculated palette sizes, this could lead to
a buffer overflow or out-of-bounds reads. An attacker could exploit this
to cause a crash or potentially execute arbitrary code by tricking an
unsuspecting user into processing a specially crafted PNG image. However,
the exact impact is dependent on the application using the library.
(CVE-2015-8126, CVE-2015-8472)

An array-indexing error was discovered in the png_convert_to_rfc1123()
function of libpng. An attacker could possibly use this flaw to cause an
out-of-bounds read by tricking an unsuspecting user into processing a
specially crafted PNG image. (CVE-2015-7981)
--

SL7
 x86_64
 libpng12-1.2.50-7.el7_2.i686.rpm
 libpng12-1.2.50-7.el7_2.x86_64.rpm
 libpng12-debuginfo-1.2.50-7.el7_2.i686.rpm
 libpng12-debuginfo-1.2.50-7.el7_2.x86_64.rpm
 libpng12-devel-1.2.50-7.el7_2.i686.rpm
 libpng12-devel-1.2.50-7.el7_2.x86_64.rpm

- Scientific Linux Development Team