GLSA-201502-10 : libpng: User-assisted execution of arbitrary code

This script is Copyright (C) 2015-2017 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-201502-10
(libpng: User-assisted execution of arbitrary code)

Two vulnerabilities have been discovered in libpng:
The png_user_version_check function contains an out-of-bounds memory
access error (libpng 1.6.15 Release Notes)
The png_combine_row function contains an integer overflow error,
which could result in a heap-based buffer overflow (CVE-2014-9495)

Impact :

A context-dependent attacker could entice a user to open a specially
crafted PNG file using an application linked against libpng, possibly
resulting in execution of arbitrary code.

Workaround :

There is no known workaround at this time.

See also :

http://www.libpng.org/pub/png/src/libpng-1.6.15-README.txt
https://security.gentoo.org/glsa/201502-10

Solution :

All libpng 1.6 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=media-libs/libpng-1.6.16'
All libpng 1.5 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=media-libs/libpng-1.5.21'

Risk factor :

Critical / CVSS Base Score : 10.0
(CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 8.7
(CVSS2#E:ND/RL:OF/RC:C)
Public Exploit Available : false

Family: Gentoo Local Security Checks

Nessus Plugin ID: 81368 ()

Bugtraq ID: 71820

CVE ID: CVE-2014-9495

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