RHEL 6 : libpng (RHSA-2015:2594)

high Nessus Plugin ID 87305
New! Plugin Severity Now Using CVSS v3

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Synopsis

The remote Red Hat host is missing one or more security updates.

Description

Updated libpng packages that fix three security issues are now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The libpng packages contain a library of functions for creating and manipulating PNG (Portable Network Graphics) image format files.

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)

All libpng users are advised to upgrade to these updated packages, which contain backported patches to correct these issues.

Solution

Update the affected packages.

See Also

https://access.redhat.com/errata/RHSA-2015:2594

https://access.redhat.com/security/cve/cve-2015-7981

https://access.redhat.com/security/cve/cve-2015-8472

https://access.redhat.com/security/cve/cve-2015-8126

Plugin Details

Severity: High

ID: 87305

File Name: redhat-RHSA-2015-2594.nasl

Version: 1.13

Type: local

Agent: unix

Published: 12/10/2015

Updated: 10/24/2019

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 7.3

Temporal Score: 6.4

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:libpng, p-cpe:/a:redhat:enterprise_linux:libpng-debuginfo, p-cpe:/a:redhat:enterprise_linux:libpng-devel, p-cpe:/a:redhat:enterprise_linux:libpng-static, cpe:/o:redhat:enterprise_linux:6, cpe:/o:redhat:enterprise_linux:6.7

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 12/9/2015

Vulnerability Publication Date: 11/12/2015

Reference Information

CVE: CVE-2015-7981, CVE-2015-8126, CVE-2015-8472

RHSA: 2015:2594