Scientific Linux: SLSA-2015:2594-1 Moderate: libpng Buffer Overflow

Date: Wed, 9 Dec 2015 16:33:09 +0000
Reply-To: scientific-linux-users@
Sender: Security Errata for Scientific Linux
 
From: Pat Riehecky 
Subject: Security ERRATA Moderate: libpng on SL6.x i386/x86_64
MIME-Version: 1.0
Message-ID: <20151209163309.26908.66064@slpackages.fnal.gov>

Synopsis: Moderate: libpng security update
Advisory ID: SLSA-2015:2594-1
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)
--

SL6
 x86_64
 libpng-1.2.49-2.el6_7.i686.rpm
 libpng-1.2.49-2.el6_7.x86_64.rpm
 libpng-debuginfo-1.2.49-2.el6_7.i686.rpm
 libpng-debuginfo-1.2.49-2.el6_7.x86_64.rpm
 libpng-devel-1.2.49-2.el6_7.i686.rpm
 libpng-devel-1.2.49-2.el6_7.x86_64.rpm
 libpng-static-1.2.49-2.el6_7.x86_64.rpm
 i386
 libpng-1.2.49-2.el6_7.i686.rpm
 libpng-debuginfo-1.2.49-2.el6_7.i686.rpm
 libpng-devel-1.2.49-2.el6_7.i686.rpm
 libpng-static-1.2.49-2.el6_7.i686.rpm

- Scientific Linux Development Team