Issued:

2011-07-28

Updated:

2011-07-28

RHSA-2011:1104 - Moderate: libpng security update

Synopsis

Moderate: libpng security update

Type/Severity

Security Advisory Moderate

Topic

Updated libpng packages that fix two security issues are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team 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.

Description

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.

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 This content is not included.https://access.redhat.com/kb/docs/DOC-11259

Affected Products

Updated Packages

• libpng-1.2.10-7.1.el5_7.5.x86_64.rpm
• libpng-devel-1.2.10-7.1.el5_7.5.s390x.rpm
• libpng-devel-1.2.10-7.1.el5_7.5.i386.rpm
• libpng-1.2.10-7.1.el5_7.5.i386.rpm
• libpng-1.2.10-7.1.el5_7.5.src.rpm
• libpng-devel-1.2.10-7.1.el5_7.5.x86_64.rpm
• libpng-1.2.10-7.1.el5_7.5.ia64.rpm
• libpng-1.2.10-7.1.el5_7.5.s390.rpm
• libpng-devel-1.2.10-7.1.el5_7.5.ia64.rpm
• libpng-devel-1.2.10-7.1.el5_7.5.ppc.rpm
• libpng-1.2.10-7.1.el5_7.5.ppc64.rpm
• libpng-devel-1.2.10-7.1.el5_7.5.ppc64.rpm
• libpng-1.2.10-7.1.el5_7.5.s390x.rpm
• libpng-1.2.10-7.1.el5_7.5.ppc.rpm
• libpng-devel-1.2.10-7.1.el5_7.5.s390.rpm

Fixes

• This content is not included.BZ - 720607
• This content is not included.BZ - 720612

CVEs

• CVE-2011-2692
• CVE-2011-2690

References

• https://access.redhat.com/security/updates/classification/#moderate

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.