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Category:   Application (Generic)  >   KDE Vendors:   KDE.org
(Red Hat Issues Fix) kdelibs Heap Overflows Let Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1027710
SecurityTracker URL:  http://securitytracker.com/id/1027710
CVE Reference:   CVE-2012-4512, CVE-2012-4513   (Links to External Site)
Date:  Oct 31 2012
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   Two vulnerabilities were reported in kdelibs. A remote user can cause arbitrary code to be executed on the target user's system.

A remote user can create specially crafted Cascading Style Sheets that, when loaded by the target user via an application that uses kdelibs, will trigger a heap overflow and execute arbitrary code on the target system [CVE-2012-4512]. The code will run with the privileges of the target user.

A remote user can create specially crafted HTML that, when loaded by the target user via an application that uses kdelibs, will trigger a heap over-read in calculating canvas dimensions for large images and execute arbitrary code on the target system [CVE-2012-4513]. The code will run with the privileges of the target user.

Impact:   A remote user can create web content that, when loaded by the target user, will execute arbitrary code on the target user's system.
Solution:   Red Hat has issued a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2012-1416.html

Vendor URL:  www.kde.org/ (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  6

Message History:   This archive entry is a follow-up to the message listed below.
Oct 31 2012 kdelibs Heap Overflows Let Remote Users Execute Arbitrary Code



 Source Message Contents

Subject:  [RHSA-2012:1416-01] Critical: kdelibs security update

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

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

Synopsis:          Critical: kdelibs security update
Advisory ID:       RHSA-2012:1416-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2012-1416.html
Issue date:        2012-10-30
CVE Names:         CVE-2012-4512 CVE-2012-4513 
=====================================================================

1. Summary:

Updated kdelibs packages that fix two security issues are now available for
Red Hat Enterprise Linux 6.

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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, noarch, x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) - noarch, x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, noarch, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, noarch, x86_64

3. Description:

The kdelibs packages provide libraries for the K Desktop Environment
(KDE). Konqueror is a web browser.

A heap-based buffer overflow flaw was found in the way the CSS (Cascading
Style Sheets) parser in kdelibs parsed the location of the source for font
faces. A web page containing malicious content could cause an application
using kdelibs (such as Konqueror) to crash or, potentially, execute
arbitrary code with the privileges of the user running the application.
(CVE-2012-4512)

A heap-based buffer over-read flaw was found in the way kdelibs calculated
canvas dimensions for large images. A web page containing malicious content
could cause an application using kdelibs to crash or disclose portions of
its memory. (CVE-2012-4513)

Users should upgrade to these updated packages, which contain backported
patches to correct these issues. The desktop must be restarted (log out,
then log back in) for this update 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/knowledge/articles/11258

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

865741 - CVE-2012-4513 kdelibs: Heap-based buffer over-read when calculating dimensions of the canvas within the scale loop
865779 - CVE-2012-4512 kdelibs: Heap-based buffer overflow when parsing location of a font face source

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/kdelibs-4.3.4-14.el6_3.2.src.rpm

i386:
kdelibs-4.3.4-14.el6_3.2.i686.rpm
kdelibs-common-4.3.4-14.el6_3.2.i686.rpm
kdelibs-debuginfo-4.3.4-14.el6_3.2.i686.rpm

x86_64:
kdelibs-4.3.4-14.el6_3.2.i686.rpm
kdelibs-4.3.4-14.el6_3.2.x86_64.rpm
kdelibs-common-4.3.4-14.el6_3.2.x86_64.rpm
kdelibs-debuginfo-4.3.4-14.el6_3.2.i686.rpm
kdelibs-debuginfo-4.3.4-14.el6_3.2.x86_64.rpm

Red Hat Enterprise Linux Desktop Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/kdelibs-4.3.4-14.el6_3.2.src.rpm

i386:
kdelibs-debuginfo-4.3.4-14.el6_3.2.i686.rpm
kdelibs-devel-4.3.4-14.el6_3.2.i686.rpm

noarch:
kdelibs-apidocs-4.3.4-14.el6_3.2.noarch.rpm

x86_64:
kdelibs-debuginfo-4.3.4-14.el6_3.2.i686.rpm
kdelibs-debuginfo-4.3.4-14.el6_3.2.x86_64.rpm
kdelibs-devel-4.3.4-14.el6_3.2.i686.rpm
kdelibs-devel-4.3.4-14.el6_3.2.x86_64.rpm

Red Hat Enterprise Linux HPC Node Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/kdelibs-4.3.4-14.el6_3.2.src.rpm

noarch:
kdelibs-apidocs-4.3.4-14.el6_3.2.noarch.rpm

x86_64:
kdelibs-4.3.4-14.el6_3.2.i686.rpm
kdelibs-4.3.4-14.el6_3.2.x86_64.rpm
kdelibs-common-4.3.4-14.el6_3.2.x86_64.rpm
kdelibs-debuginfo-4.3.4-14.el6_3.2.i686.rpm
kdelibs-debuginfo-4.3.4-14.el6_3.2.x86_64.rpm
kdelibs-devel-4.3.4-14.el6_3.2.i686.rpm
kdelibs-devel-4.3.4-14.el6_3.2.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/kdelibs-4.3.4-14.el6_3.2.src.rpm

i386:
kdelibs-4.3.4-14.el6_3.2.i686.rpm
kdelibs-common-4.3.4-14.el6_3.2.i686.rpm
kdelibs-debuginfo-4.3.4-14.el6_3.2.i686.rpm
kdelibs-devel-4.3.4-14.el6_3.2.i686.rpm

noarch:
kdelibs-apidocs-4.3.4-14.el6_3.2.noarch.rpm

ppc64:
kdelibs-4.3.4-14.el6_3.2.ppc.rpm
kdelibs-4.3.4-14.el6_3.2.ppc64.rpm
kdelibs-common-4.3.4-14.el6_3.2.ppc64.rpm
kdelibs-debuginfo-4.3.4-14.el6_3.2.ppc.rpm
kdelibs-debuginfo-4.3.4-14.el6_3.2.ppc64.rpm
kdelibs-devel-4.3.4-14.el6_3.2.ppc.rpm
kdelibs-devel-4.3.4-14.el6_3.2.ppc64.rpm

s390x:
kdelibs-4.3.4-14.el6_3.2.s390.rpm
kdelibs-4.3.4-14.el6_3.2.s390x.rpm
kdelibs-common-4.3.4-14.el6_3.2.s390x.rpm
kdelibs-debuginfo-4.3.4-14.el6_3.2.s390.rpm
kdelibs-debuginfo-4.3.4-14.el6_3.2.s390x.rpm
kdelibs-devel-4.3.4-14.el6_3.2.s390.rpm
kdelibs-devel-4.3.4-14.el6_3.2.s390x.rpm

x86_64:
kdelibs-4.3.4-14.el6_3.2.i686.rpm
kdelibs-4.3.4-14.el6_3.2.x86_64.rpm
kdelibs-common-4.3.4-14.el6_3.2.x86_64.rpm
kdelibs-debuginfo-4.3.4-14.el6_3.2.i686.rpm
kdelibs-debuginfo-4.3.4-14.el6_3.2.x86_64.rpm
kdelibs-devel-4.3.4-14.el6_3.2.i686.rpm
kdelibs-devel-4.3.4-14.el6_3.2.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/kdelibs-4.3.4-14.el6_3.2.src.rpm

i386:
kdelibs-4.3.4-14.el6_3.2.i686.rpm
kdelibs-common-4.3.4-14.el6_3.2.i686.rpm
kdelibs-debuginfo-4.3.4-14.el6_3.2.i686.rpm
kdelibs-devel-4.3.4-14.el6_3.2.i686.rpm

noarch:
kdelibs-apidocs-4.3.4-14.el6_3.2.noarch.rpm

x86_64:
kdelibs-4.3.4-14.el6_3.2.i686.rpm
kdelibs-4.3.4-14.el6_3.2.x86_64.rpm
kdelibs-common-4.3.4-14.el6_3.2.x86_64.rpm
kdelibs-debuginfo-4.3.4-14.el6_3.2.i686.rpm
kdelibs-debuginfo-4.3.4-14.el6_3.2.x86_64.rpm
kdelibs-devel-4.3.4-14.el6_3.2.i686.rpm
kdelibs-devel-4.3.4-14.el6_3.2.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-2012-4512.html
https://www.redhat.com/security/data/cve/CVE-2012-4513.html
https://access.redhat.com/security/updates/classification/#critical

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2012 Red Hat, Inc.
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