Uočen je propust u radu programskog paketa Mozilla Firefox. Napadači mogu iskoristiti ranjivost za proizvoljno izvršavanje programskog koda s privilegijama korisnika koji je pokrenuo program i DoS napad.

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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Critical: firefox security update
Advisory ID:       RHSA-2012:0142-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2012-0142.html
Issue date:        2012-02-16
CVE Names:         CVE-2011-3026 
=====================================================================

1. Summary:

An updated firefox package that fixes one security issue is now available
for Red Hat Enterprise Linux 4.

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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux Desktop version 4 - i386, x86_64
Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64

3. Description:

Mozilla Firefox is an open source web browser.

A heap-based buffer overflow flaw was found in the way Firefox handled
PNG (Portable Network Graphics) images. A web page containing a malicious
PNG image could cause Firefox to crash or, possibly, execute arbitrary
code with the privileges of the user running Firefox. (CVE-2011-3026)

All Firefox users should upgrade to this updated package, which corrects
this issue. After installing the update, Firefox must be restarted for the
changes to take effect.

4. 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

5. Bugs fixed (http://bugzilla.redhat.com/):

790737 - CVE-2011-3026 libpng: Heap-buffer-overflow in png_decompress_chunk

6. Package List:

Red Hat Enterprise Linux AS version 4:

Source:
ftp://updates.redhat.com/enterprise/4AS/en/os/SRPMS/firefox-3.6.26-3.el4.src.rpm

i386:
firefox-3.6.26-3.el4.i386.rpm
firefox-debuginfo-3.6.26-3.el4.i386.rpm

ia64:
firefox-3.6.26-3.el4.ia64.rpm
firefox-debuginfo-3.6.26-3.el4.ia64.rpm

ppc:
firefox-3.6.26-3.el4.ppc.rpm
firefox-debuginfo-3.6.26-3.el4.ppc.rpm

s390:
firefox-3.6.26-3.el4.s390.rpm
firefox-debuginfo-3.6.26-3.el4.s390.rpm

s390x:
firefox-3.6.26-3.el4.s390x.rpm
firefox-debuginfo-3.6.26-3.el4.s390x.rpm

x86_64:
firefox-3.6.26-3.el4.x86_64.rpm
firefox-debuginfo-3.6.26-3.el4.x86_64.rpm

Red Hat Enterprise Linux Desktop version 4:

Source:
ftp://updates.redhat.com/enterprise/4Desktop/en/os/SRPMS/firefox-3.6.26-3.el4.src.rpm

i386:
firefox-3.6.26-3.el4.i386.rpm
firefox-debuginfo-3.6.26-3.el4.i386.rpm

x86_64:
firefox-3.6.26-3.el4.x86_64.rpm
firefox-debuginfo-3.6.26-3.el4.x86_64.rpm

Red Hat Enterprise Linux ES version 4:

Source:
ftp://updates.redhat.com/enterprise/4ES/en/os/SRPMS/firefox-3.6.26-3.el4.src.rpm

i386:
firefox-3.6.26-3.el4.i386.rpm
firefox-debuginfo-3.6.26-3.el4.i386.rpm

ia64:
firefox-3.6.26-3.el4.ia64.rpm
firefox-debuginfo-3.6.26-3.el4.ia64.rpm

x86_64:
firefox-3.6.26-3.el4.x86_64.rpm
firefox-debuginfo-3.6.26-3.el4.x86_64.rpm

Red Hat Enterprise Linux WS version 4:

Source:
ftp://updates.redhat.com/enterprise/4WS/en/os/SRPMS/firefox-3.6.26-3.el4.src.rpm

i386:
firefox-3.6.26-3.el4.i386.rpm
firefox-debuginfo-3.6.26-3.el4.i386.rpm

ia64:
firefox-3.6.26-3.el4.ia64.rpm
firefox-debuginfo-3.6.26-3.el4.ia64.rpm

x86_64:
firefox-3.6.26-3.el4.x86_64.rpm
firefox-debuginfo-3.6.26-3.el4.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2011-3026.html
https://access.redhat.com/security/updates/classification/#critical

8. Contact:

The Red Hat security contact is <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.>.  More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2012 Red Hat, Inc.
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