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Red Hat Enterprise Linux 5 Moderate Advisory: libpng Buffer Overflow

red hat
Calendar Grey July 28, 2011
Scroller Redhat Esm H88
OpenShift has released a significant patch for libjpeg resolving several urgent vulnerabilities. Update immediately!
Updated libpng packages that fix two security issues are now available for Red Hat Enterprise Linux 5

Solution

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

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/kb/docs/DOC-11259

Summary

The libpng packages contain a library of functions for creating and manipulating PNG (Portable Network Graphics) image format files.
A buffer overflow flaw was found in the way libpng processed certain PNG image files. An attacker could create a specially-crafted PNG image that, when opened, could cause an application using libpng to crash or, potentially, execute arbitrary code with the privileges of the user running the application. (CVE-2011-2690)
Note: The application behavior required to exploit CVE-2011-2690 is rarely used. No application shipped with Red Hat Enterprise Linux behaves this way, for example.
An uninitialized memory read issue was found in the way libpng processed certain PNG images that use the Physical Scale (sCAL) extension. An attacker could create a specially-crafted PNG image that, when opened, could cause an application using libpng to crash. (CVE-2011-2692)
Users of libpng should upgrade to these updated packages, which contain backported patches to correct these issues. All running applications using libpng must be restarted for the update to take effect.

Topics%20covered

Topics Covered

security advisory buffer overflow Red Hat Enterprise Linux moderate severity libpng PNG processing issue

References

https://access.redhat.com/security/cve/CVE-2011-2690 https://access.redhat.com/security/cve/CVE-2011-2692 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux Desktop (v. 5 client):
Source:
i386: libpng-1.2.10-7.1.el5_7.5.i386.rpm libpng-debuginfo-1.2.10-7.1.el5_7.5.i386.rpm
x86_64: libpng-1.2.10-7.1.el5_7.5.i386.rpm libpng-1.2.10-7.1.el5_7.5.x86_64.rpm libpng-debuginfo-1.2.10-7.1.el5_7.5.i386.rpm libpng-debuginfo-1.2.10-7.1.el5_7.5.x86_64.rpm
RHEL Desktop Workstation (v. 5 client):
Source:
i386: libpng-debuginfo-1.2.10-7.1.el5_7.5.i386.rpm libpng-devel-1.2.10-7.1.el5_7.5.i386.rpm
x86_64: libpng-debuginfo-1.2.10-7.1.el5_7.5.i386.rpm libpng-debuginfo-1.2.10-7.1.el5_7.5.x86_64.rpm libpng-devel-1.2.10-7.1.el5_7.5.i386.rpm libpng-devel-1.2.10-7.1.el5_7.5.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
i386: libpng-1.2.10-7.1.el5_7.5.i386.rpm libpng-debuginfo-1.2.10-7.1.el5_7.5.i386.rpm libpng-devel-1.2.10-7.1.el5_7.5.i386.rpm
ia64: libpng-1.2.10-7.1.el5_7.5.i386.rpm libpng-1.2.10-7.1.el5_7.5.ia64.rpm libpng-debuginfo-1.2.10-7.1.el5_7.5.i386.rpm libpng-debuginfo-1.2.10-7.1.el5_7.5.ia64.rpm libpng-devel-1.2.10-7.1.el5_7.5.ia64.rpm
ppc: libpng-1.2.10-7.1.el5_7.5.ppc.rpm libpng-1.2.10-7.1.el5_7.5.ppc64.rpm libpng-debuginfo-1.2.10-7.1.el5_7.5.ppc.rpm libpng-debuginfo-1.2.10-7.1.el5_7.5.ppc64.rpm libpng-devel-1.2.10-7.1.el5_7.5.ppc.rpm libpng-devel-1.2.10-7.1.el5_7.5.ppc64.rpm
s390x:

Read the Full Advisory


Advisory ID: RHSA-2011:1104-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2011:1104.html
Issue date: 2011-07-28

Topic

Updated libpng packages that fix two security issues are now available forRed Hat Enterprise Linux 5.The Red Hat Security Response Team has rated this update as having moderatesecurity impact. Common Vulnerability Scoring System (CVSS) base scores,which give detailed severity ratings, are available for each vulnerabilityfrom the CVE links in the References section.

Topics%20covered

Topics Covered

security advisory buffer overflow Red Hat Enterprise Linux moderate severity libpng PNG processing issue

Relevant Releases Architectures

RHEL Desktop Workstation (v. 5 client) - i386, x86_64

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

Bugs Fixed

720607 - CVE-2011-2690 libpng: buffer overwrite in png_rgb_to_gray

720612 - CVE-2011-2692 libpng: Invalid read when handling empty sCAL chunks

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