RHSA-2011:1105: Moderate: libpng security update
First published: Thu Jul 28 2011(Updated: )
The libpng packages contain a library of functions for creating and<br>manipulating PNG (Portable Network Graphics) image format files.<br>A buffer overflow flaw was found in the way libpng processed certain PNG<br>image files. An attacker could create a specially-crafted PNG image that,<br>when opened, could cause an application using libpng to crash or,<br>potentially, execute arbitrary code with the privileges of the user running<br>the application. (CVE-2011-2690)<br>Note: The application behavior required to exploit CVE-2011-2690 is rarely<br>used. No application shipped with Red Hat Enterprise Linux behaves this<br>way, for example.<br>An out-of-bounds memory read flaw was found in the way libpng processed<br>certain PNG image files. An attacker could create a specially-crafted PNG<br>image that, when opened, could cause an application using libpng to crash.<br>(CVE-2011-2501)<br>An uninitialized memory read issue was found in the way libpng processed<br>certain PNG images that use the Physical Scale (sCAL) extension. An<br>attacker could create a specially-crafted PNG image that, when opened,<br>could cause an application using libpng to crash. (CVE-2011-2692)<br>Users of libpng should upgrade to these updated packages, which upgrade<br>libpng to version 1.2.46 to correct these issues. All running applications<br>using libpng must be restarted for the update to take effect.<br>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/libpng | <1.2.46-1.el6_1 | 1.2.46-1.el6_1 |
| redhat/libpng | <1.2.46-1.el6_1 | 1.2.46-1.el6_1 |
| redhat/libpng-debuginfo | <1.2.46-1.el6_1 | 1.2.46-1.el6_1 |
| redhat/libpng-debuginfo | <1.2.46-1.el6_1 | 1.2.46-1.el6_1 |
| redhat/libpng-devel | <1.2.46-1.el6_1 | 1.2.46-1.el6_1 |
| redhat/libpng-devel | <1.2.46-1.el6_1 | 1.2.46-1.el6_1 |
| redhat/libpng-static | <1.2.46-1.el6_1 | 1.2.46-1.el6_1 |
| redhat/libpng-static | <1.2.46-1.el6_1 | 1.2.46-1.el6_1 |
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Reference Links
- https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=717084
- https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=720607
- https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=720612
- https://access.redhat.com/security/updates/classification/#moderate
- https://access.redhat.com/errata/RHSA-2011:1105 (Advisory)
Frequently Asked Questions
What is the severity of RHSA-2011:1105?
RHSA-2011:1105 is classified as a critical vulnerability due to the potential for remote code execution from specially crafted PNG files.
How do I fix RHSA-2011:1105?
To remediate RHSA-2011:1105, update the libpng packages to version 1.2.46-1.el6_1 or later.
Which versions of libpng are affected by RHSA-2011:1105?
RHSA-2011:1105 affects all versions of libpng prior to 1.2.46-1.el6_1.
What type of attack does RHSA-2011:1105 facilitate?
RHSA-2011:1105 could be exploited to conduct buffer overflow attacks that may allow execution of arbitrary code.
Is there a workaround for RHSA-2011:1105?
There are no known workarounds for RHSA-2011:1105; updating to the fixed version is strongly recommended.
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