RHSA-2011:0309 - Security Advisory

Topic

Updated pango packages that fix one security issue are now available for
Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having critical
security impact. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available from the CVE link in
the References section.

Description

Pango is a library used for the layout and rendering of internationalized
text.

It was discovered that Pango did not check for memory reallocation failures
in the hb_buffer_ensure() function. An attacker able to trigger a
reallocation failure by passing sufficiently large input to an application
using Pango could use this flaw to crash the application or, possibly,
execute arbitrary code with the privileges of the user running the
application. (CVE-2011-0064)

Red Hat would like to thank the Mozilla Security Team for reporting this
issue.

All pango users should upgrade to these updated packages, which contain a
backported patch to correct this issue. After installing this update, you
must restart your system or restart the X server 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
https://access.redhat.com/kb/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for IBM z Systems 6 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems) 6 s390x

Fixes

• BZ - 678563 - CVE-2011-0064 pango: missing memory reallocation failure checking in hb_buffer_ensure

CVEs

• CVE-2011-0064

References

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