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Red Hat 7 RHSA-2015:2595-01 Moderate: libpng12 Buffer Overflow

red hat
Calendar Grey December 9, 2015
Scroller Redhat
Recent libpng12 upgrades improve defense measures for Red Hat Enterprise Linux, mitigating code execution threats and system vulnerabilities.
Updated libpng12 packages that fix three security issues are now available for Red Hat Enterprise Linux 7

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Summary

The libpng12 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 libpng12 users are advised to upgrade to these updated packages, which contain backported patches to correct these issues.

Topics%20covered

Topics Covered

security advisory buffer overflow moderate severity red hat enterprise linux code execution risk libpng12 png format issue

References

https://access.redhat.com/security/cve/CVE-2015-7981 https://access.redhat.com/security/cve/CVE-2015-8126 https://access.redhat.com/security/cve/CVE-2015-8472 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: libpng12-1.2.50-7.el7_2.src.rpm
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
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: 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
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: libpng12-1.2.50-7.el7_2.src.rpm
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
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
x86_64: 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
Red Hat Enterprise Linux Server (v. 7):
Source: libpng12-1.2.50-7.el7_2.src.rpm
aarch64: libpng12-1.2.50-7.el7_2.aarch64.rpm libpng12-debuginfo-1.2.50-7.el7_2.aarch64.rpm
ppc64: libpng12-1.2.50-7.el7_2.ppc.rpm libpng12-1.2.50-7.el7_2.ppc64.rpm libpng12-debuginfo-1.2.50-7.el7_2.ppc.rpm libpng12-debuginfo-1.2.50-7.el7_2.ppc64.rpm
ppc64le:

Read the Full Advisory


Advisory ID: RHSA-2015:2595-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2015:2595.html
Issue date: 2015-12-09

Topic

Updated libpng12 packages that fix three security issues are now availablefor Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having Moderate securityimpact. Common Vulnerability Scoring System (CVSS) base scores, whichgive detailed severity ratings, are available for each vulnerabilityfrom the CVE links in the References section.

Topics%20covered

Topics Covered

security advisory buffer overflow moderate severity red hat enterprise linux code execution risk libpng12 png format issue

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Bugs Fixed

1276416 - CVE-2015-7981 libpng: Out-of-bounds read in png_convert_to_rfc1123

1281756 - CVE-2015-8126 CVE-2015-8472 libpng: Buffer overflow vulnerabilities in png_get_PLTE/png_set_PLTE functions

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