Synopsis

Critical: firefox security update

Type/Severity

Security Advisory: Critical

Topic

Updated firefox and xulrunner packages that fix a security issue are now
available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having critical
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

Mozilla Firefox is an open source web browser. XULRunner provides the XUL
Runtime environment for Mozilla Firefox.

An invalid free flaw was found in Firefox's plugin handler. Malicious web
content could result in an invalid memory pointer being freed, causing Firefox
to crash or, potentially, execute arbitrary code with the privileges of the user
running the Firefox application. (CVE-2010-2755)

All Firefox users should upgrade to these updated packages, which contain a
backported patch that corrects this issue. After installing the update, Firefox
must be restarted for the changes 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
http://kbase.redhat.com/faq/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux Desktop 5 x86_64
• Red Hat Enterprise Linux Desktop 5 i386
• Red Hat Enterprise Linux for IBM z Systems 5 s390x
• Red Hat Enterprise Linux for Power, big endian 5 ppc
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

• BZ - 617657 - CVE-2010-2755 Mozilla arbitrary free flaw

CVEs

• CVE-2010-2755

References

• http://www.redhat.com/security/updates/classification/#critical

Red Hat Enterprise Linux Server 5

SRPM
x86_64
ia64
i386

Red Hat Enterprise Linux Workstation 5

SRPM
x86_64
i386

Red Hat Enterprise Linux Desktop 5

SRPM
x86_64
i386

Red Hat Enterprise Linux for IBM z Systems 5

SRPM
s390x

Red Hat Enterprise Linux for Power, big endian 5

SRPM
ppc

Red Hat Enterprise Linux Server from RHUI 5

SRPM
x86_64
i386