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Category:   Application (Generic)  >   KDE Vendors:   KDE.org
(Red Hat Issues Fix) KDE Display Manager Lets Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1023884
SecurityTracker URL:  http://securitytracker.com/id/1023884
CVE Reference:   CVE-2010-0436   (Links to External Site)
Date:  Apr 14 2010
Impact:   Execution of arbitrary code via local system, Root access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): KDM as shipped with KDE SC 2.2.0 through KDE SC 4.4.2
Description:   A vulnerability was reported in KDE Display Manager (KDM). A local user can obtain elevated privileges on the target system.

A local user with access to a console running KDM can exploit a race condition to cause an arbitrary file on the filesystem to be set with world-writable permissions.

Sebastian Krahmer from the SUSE security team reported this vulnerability.

Impact:   A local user can obtain root privileges on the target system.
Solution:   Red Hat has issued a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2010-0348.html

Vendor URL:  www.kde.org/info/security/advisory-20100413-1.txt (Links to External Site)
Cause:   Access control error, State error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  4, 5

Message History:   This archive entry is a follow-up to the message listed below.
Apr 14 2010 KDE Display Manager Lets Local Users Gain Elevated Privileges



 Source Message Contents

Subject:  [RHSA-2010:0348-01] Important: kdebase security update

-----BEGIN PGP SIGNED MESSAGE-----
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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: kdebase security update
Advisory ID:       RHSA-2010:0348-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2010-0348.html
Issue date:        2010-04-14
CVE Names:         CVE-2010-0436 
=====================================================================

1. Summary:

Updated kdebase packages that fix one security issue are now available for
Red Hat Enterprise Linux 4 and 5.

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

RHEL Desktop Workstation (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, 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:

The K Desktop Environment (KDE) is a graphical desktop environment for the
X Window System. The kdebase packages include core applications for KDE.

A privilege escalation flaw was found in the KDE Display Manager (KDM). A
local user with console access could trigger a race condition, possibly
resulting in the permissions of an arbitrary file being set to world
writable, allowing privilege escalation. (CVE-2010-0436)

Red Hat would like to thank Sebastian Krahmer of the SuSE Security Team for
responsibly reporting this issue.

Users of KDE should upgrade to these updated packages, which contain a
backported patch to correct this issue. The system should be rebooted for
this update to take effect. After the reboot, administrators should
manually remove all leftover user-owned dmctl-* directories in
"/var/run/xdmctl/".

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
http://kbase.redhat.com/faq/docs/DOC-11259

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

570613 - CVE-2010-0436 kdm privilege escalation flaw

6. Package List:

Red Hat Enterprise Linux AS version 4:

Source:
ftp://updates.redhat.com/enterprise/4AS/en/os/SRPMS/kdebase-3.3.1-13.el4_8.1.src.rpm

i386:
kdebase-3.3.1-13.el4_8.1.i386.rpm
kdebase-debuginfo-3.3.1-13.el4_8.1.i386.rpm
kdebase-devel-3.3.1-13.el4_8.1.i386.rpm

ia64:
kdebase-3.3.1-13.el4_8.1.i386.rpm
kdebase-3.3.1-13.el4_8.1.ia64.rpm
kdebase-debuginfo-3.3.1-13.el4_8.1.i386.rpm
kdebase-debuginfo-3.3.1-13.el4_8.1.ia64.rpm
kdebase-devel-3.3.1-13.el4_8.1.ia64.rpm

ppc:
kdebase-3.3.1-13.el4_8.1.ppc.rpm
kdebase-3.3.1-13.el4_8.1.ppc64.rpm
kdebase-debuginfo-3.3.1-13.el4_8.1.ppc.rpm
kdebase-debuginfo-3.3.1-13.el4_8.1.ppc64.rpm
kdebase-devel-3.3.1-13.el4_8.1.ppc.rpm

s390:
kdebase-3.3.1-13.el4_8.1.s390.rpm
kdebase-debuginfo-3.3.1-13.el4_8.1.s390.rpm
kdebase-devel-3.3.1-13.el4_8.1.s390.rpm

s390x:
kdebase-3.3.1-13.el4_8.1.s390.rpm
kdebase-3.3.1-13.el4_8.1.s390x.rpm
kdebase-debuginfo-3.3.1-13.el4_8.1.s390.rpm
kdebase-debuginfo-3.3.1-13.el4_8.1.s390x.rpm
kdebase-devel-3.3.1-13.el4_8.1.s390x.rpm

x86_64:
kdebase-3.3.1-13.el4_8.1.i386.rpm
kdebase-3.3.1-13.el4_8.1.x86_64.rpm
kdebase-debuginfo-3.3.1-13.el4_8.1.i386.rpm
kdebase-debuginfo-3.3.1-13.el4_8.1.x86_64.rpm
kdebase-devel-3.3.1-13.el4_8.1.x86_64.rpm

Red Hat Enterprise Linux Desktop version 4:

Source:
ftp://updates.redhat.com/enterprise/4Desktop/en/os/SRPMS/kdebase-3.3.1-13.el4_8.1.src.rpm

i386:
kdebase-3.3.1-13.el4_8.1.i386.rpm
kdebase-debuginfo-3.3.1-13.el4_8.1.i386.rpm
kdebase-devel-3.3.1-13.el4_8.1.i386.rpm

x86_64:
kdebase-3.3.1-13.el4_8.1.i386.rpm
kdebase-3.3.1-13.el4_8.1.x86_64.rpm
kdebase-debuginfo-3.3.1-13.el4_8.1.i386.rpm
kdebase-debuginfo-3.3.1-13.el4_8.1.x86_64.rpm
kdebase-devel-3.3.1-13.el4_8.1.x86_64.rpm

Red Hat Enterprise Linux ES version 4:

Source:
ftp://updates.redhat.com/enterprise/4ES/en/os/SRPMS/kdebase-3.3.1-13.el4_8.1.src.rpm

i386:
kdebase-3.3.1-13.el4_8.1.i386.rpm
kdebase-debuginfo-3.3.1-13.el4_8.1.i386.rpm
kdebase-devel-3.3.1-13.el4_8.1.i386.rpm

ia64:
kdebase-3.3.1-13.el4_8.1.i386.rpm
kdebase-3.3.1-13.el4_8.1.ia64.rpm
kdebase-debuginfo-3.3.1-13.el4_8.1.i386.rpm
kdebase-debuginfo-3.3.1-13.el4_8.1.ia64.rpm
kdebase-devel-3.3.1-13.el4_8.1.ia64.rpm

x86_64:
kdebase-3.3.1-13.el4_8.1.i386.rpm
kdebase-3.3.1-13.el4_8.1.x86_64.rpm
kdebase-debuginfo-3.3.1-13.el4_8.1.i386.rpm
kdebase-debuginfo-3.3.1-13.el4_8.1.x86_64.rpm
kdebase-devel-3.3.1-13.el4_8.1.x86_64.rpm

Red Hat Enterprise Linux WS version 4:

Source:
ftp://updates.redhat.com/enterprise/4WS/en/os/SRPMS/kdebase-3.3.1-13.el4_8.1.src.rpm

i386:
kdebase-3.3.1-13.el4_8.1.i386.rpm
kdebase-debuginfo-3.3.1-13.el4_8.1.i386.rpm
kdebase-devel-3.3.1-13.el4_8.1.i386.rpm

ia64:
kdebase-3.3.1-13.el4_8.1.i386.rpm
kdebase-3.3.1-13.el4_8.1.ia64.rpm
kdebase-debuginfo-3.3.1-13.el4_8.1.i386.rpm
kdebase-debuginfo-3.3.1-13.el4_8.1.ia64.rpm
kdebase-devel-3.3.1-13.el4_8.1.ia64.rpm

x86_64:
kdebase-3.3.1-13.el4_8.1.i386.rpm
kdebase-3.3.1-13.el4_8.1.x86_64.rpm
kdebase-debuginfo-3.3.1-13.el4_8.1.i386.rpm
kdebase-debuginfo-3.3.1-13.el4_8.1.x86_64.rpm
kdebase-devel-3.3.1-13.el4_8.1.x86_64.rpm

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/kdebase-3.5.4-21.el5_5.1.src.rpm

i386:
kdebase-3.5.4-21.el5_5.1.i386.rpm
kdebase-debuginfo-3.5.4-21.el5_5.1.i386.rpm

x86_64:
kdebase-3.5.4-21.el5_5.1.i386.rpm
kdebase-3.5.4-21.el5_5.1.x86_64.rpm
kdebase-debuginfo-3.5.4-21.el5_5.1.i386.rpm
kdebase-debuginfo-3.5.4-21.el5_5.1.x86_64.rpm

RHEL Desktop Workstation (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/kdebase-3.5.4-21.el5_5.1.src.rpm

i386:
kdebase-debuginfo-3.5.4-21.el5_5.1.i386.rpm
kdebase-devel-3.5.4-21.el5_5.1.i386.rpm

x86_64:
kdebase-debuginfo-3.5.4-21.el5_5.1.i386.rpm
kdebase-debuginfo-3.5.4-21.el5_5.1.x86_64.rpm
kdebase-devel-3.5.4-21.el5_5.1.i386.rpm
kdebase-devel-3.5.4-21.el5_5.1.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/kdebase-3.5.4-21.el5_5.1.src.rpm

i386:
kdebase-3.5.4-21.el5_5.1.i386.rpm
kdebase-debuginfo-3.5.4-21.el5_5.1.i386.rpm
kdebase-devel-3.5.4-21.el5_5.1.i386.rpm

ia64:
kdebase-3.5.4-21.el5_5.1.ia64.rpm
kdebase-debuginfo-3.5.4-21.el5_5.1.ia64.rpm
kdebase-devel-3.5.4-21.el5_5.1.ia64.rpm

ppc:
kdebase-3.5.4-21.el5_5.1.ppc.rpm
kdebase-3.5.4-21.el5_5.1.ppc64.rpm
kdebase-debuginfo-3.5.4-21.el5_5.1.ppc.rpm
kdebase-debuginfo-3.5.4-21.el5_5.1.ppc64.rpm
kdebase-devel-3.5.4-21.el5_5.1.ppc.rpm
kdebase-devel-3.5.4-21.el5_5.1.ppc64.rpm

s390x:
kdebase-3.5.4-21.el5_5.1.s390.rpm
kdebase-3.5.4-21.el5_5.1.s390x.rpm
kdebase-debuginfo-3.5.4-21.el5_5.1.s390.rpm
kdebase-debuginfo-3.5.4-21.el5_5.1.s390x.rpm
kdebase-devel-3.5.4-21.el5_5.1.s390.rpm
kdebase-devel-3.5.4-21.el5_5.1.s390x.rpm

x86_64:
kdebase-3.5.4-21.el5_5.1.i386.rpm
kdebase-3.5.4-21.el5_5.1.x86_64.rpm
kdebase-debuginfo-3.5.4-21.el5_5.1.i386.rpm
kdebase-debuginfo-3.5.4-21.el5_5.1.x86_64.rpm
kdebase-devel-3.5.4-21.el5_5.1.i386.rpm
kdebase-devel-3.5.4-21.el5_5.1.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://www.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2010-0436.html
http://www.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2010 Red Hat, Inc.
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