GLSA-200903-28 : libpng: Multiple vulnerabilities

This script is Copyright (C) 2009-2014 Tenable Network Security, Inc.


Synopsis :

The remote Gentoo host is missing one or more security-related
patches.

Description :

The remote host is affected by the vulnerability described in GLSA-200903-28
(libpng: Multiple vulnerabilities)

Multiple vulnerabilities were discovered in libpng:
A
memory leak bug was reported in png_handle_tEXt(), a function that is
used while reading PNG images (CVE-2008-6218).
A memory
overwrite bug was reported by Jon Foster in png_check_keyword(), caused
by writing overlong keywords to a PNG file (CVE-2008-5907).
A
memory corruption issue, caused by an incorrect handling of an out of
memory condition has been reported by Tavis Ormandy of the Google
Security Team. That vulnerability affects direct uses of
png_read_png(), pCAL chunk and 16-bit gamma table handling
(CVE-2009-0040).

Impact :

A remote attacker may execute arbitrary code with the privileges of the
user opening a specially crafted PNG file by exploiting the erroneous
out-of-memory handling. An attacker may also exploit the
png_check_keyword() error to set arbitrary memory locations to 0, if
the application allows overlong, user-controlled keywords when writing
PNG files. The png_handle_tEXT() vulnerability may be exploited by an
attacker to potentially consume all memory on a users system when a
specially crafted PNG file is opened.

Workaround :

There is no known workaround at this time.

See also :

http://www.gentoo.org/security/en/glsa/glsa-200903-28.xml

Solution :

All libpng users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=media-libs/libpng-1.2.35'

Risk factor :

High / CVSS Base Score : 7.1
(CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:C)
CVSS Temporal Score : 5.3
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Gentoo Local Security Checks

Nessus Plugin ID: 35929 (gentoo_GLSA-200903-28.nasl)

Bugtraq ID: 31920
33827

CVE ID: CVE-2008-5907
CVE-2008-6218
CVE-2009-0040