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Category:   Application (Generic)  >   D-BUS Vendors:   Freedesktop.org
(Red Hat Issues Revised Fix) D-Bus dbus_signature_validate() Bug Lets Local Users Deny Service
SecurityTracker Alert ID:  1021531
SecurityTracker URL:  http://securitytracker.com/id/1021531
CVE Reference:   CVE-2008-3834, CVE-2009-1189   (Links to External Site)
Updated:  Jan 7 2010
Original Entry Date:  Jan 7 2009
Impact:   Denial of service via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 1.2.4
Description:   A vulnerability was reported in D-Bus. A local user can cause denial of service conditions.

A local user can supply a specially crafted message signature type to the dbus_signature_validate() function to the cause the target application to crash.

schelte at wanadoo.nl reported this vulnerability.
Impact:   A local user can cause the target application to crash.
Solution:   Red Hat has released a revised fix. The original fix reported in Red Hat Security Advisory RHSA-2009:0008 [CVE-2008-3834] did not properly fix the vulnerability. The failure to fix the vulnerability has been assigned CVE-2009-1189.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2010-0018.html
Vendor URL:  www.freedesktop.org/wiki/Software/dbus (Links to External Site)
Cause:   Exception handling error
Underlying OS:   Linux (Red Hat Enterprise)

Message History:   This archive entry is a follow-up to the message listed below.
Oct 16 2008 D-Bus dbus_signature_validate() Bug Lets Local Users Deny Service


 Source Message Contents
Date:  Wed, 7 Jan 2009 09:09:16 -0500
Subject:  [RHSA-2009:0008-01] Moderate: dbus security update


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

Synopsis:          Moderate: dbus security update
Advisory ID:       RHSA-2009:0008-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2009-0008.html
Issue date:        2009-01-07
CVE Names:         CVE-2008-3834 
=====================================================================

1. Summary:

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

This update has been rated as having moderate security impact by the Red
Hat Security Response Team.

2. Relevant releases/architectures:

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

3. Description:

D-Bus is a system for sending messages between applications. It is used for
the system-wide message bus service and as a per-user-login-session
messaging facility.

A denial-of-service flaw was discovered in the system for sending messages
between applications. A local user could send a message with a malformed
signature to the bus causing the bus (and, consequently, any process using
libdbus to receive messages) to abort. (CVE-2008-3834)

All users are advised to upgrade to these updated dbus packages, which
contain backported patch which resolve this issue. For the update to take
effect, all running instances of dbus-daemon and all running applications
using libdbus library must be restarted, or the system rebooted.

4. Solution:

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.

This update is available via 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/):

464674 - CVE-2008-3834 dbus denial of service

6. Package List:

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

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/dbus-1.0.0-7.el5_2.1.src.rpm

i386:
dbus-1.0.0-7.el5_2.1.i386.rpm
dbus-debuginfo-1.0.0-7.el5_2.1.i386.rpm
dbus-x11-1.0.0-7.el5_2.1.i386.rpm

x86_64:
dbus-1.0.0-7.el5_2.1.i386.rpm
dbus-1.0.0-7.el5_2.1.x86_64.rpm
dbus-debuginfo-1.0.0-7.el5_2.1.i386.rpm
dbus-debuginfo-1.0.0-7.el5_2.1.x86_64.rpm
dbus-x11-1.0.0-7.el5_2.1.x86_64.rpm

RHEL Desktop Workstation (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/dbus-1.0.0-7.el5_2.1.src.rpm

i386:
dbus-debuginfo-1.0.0-7.el5_2.1.i386.rpm
dbus-devel-1.0.0-7.el5_2.1.i386.rpm

x86_64:
dbus-debuginfo-1.0.0-7.el5_2.1.i386.rpm
dbus-debuginfo-1.0.0-7.el5_2.1.x86_64.rpm
dbus-devel-1.0.0-7.el5_2.1.i386.rpm
dbus-devel-1.0.0-7.el5_2.1.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/dbus-1.0.0-7.el5_2.1.src.rpm

i386:
dbus-1.0.0-7.el5_2.1.i386.rpm
dbus-debuginfo-1.0.0-7.el5_2.1.i386.rpm
dbus-devel-1.0.0-7.el5_2.1.i386.rpm
dbus-x11-1.0.0-7.el5_2.1.i386.rpm

ia64:
dbus-1.0.0-7.el5_2.1.ia64.rpm
dbus-debuginfo-1.0.0-7.el5_2.1.ia64.rpm
dbus-devel-1.0.0-7.el5_2.1.ia64.rpm
dbus-x11-1.0.0-7.el5_2.1.ia64.rpm

ppc:
dbus-1.0.0-7.el5_2.1.ppc.rpm
dbus-1.0.0-7.el5_2.1.ppc64.rpm
dbus-debuginfo-1.0.0-7.el5_2.1.ppc.rpm
dbus-debuginfo-1.0.0-7.el5_2.1.ppc64.rpm
dbus-devel-1.0.0-7.el5_2.1.ppc.rpm
dbus-devel-1.0.0-7.el5_2.1.ppc64.rpm
dbus-x11-1.0.0-7.el5_2.1.ppc.rpm

s390x:
dbus-1.0.0-7.el5_2.1.s390.rpm
dbus-1.0.0-7.el5_2.1.s390x.rpm
dbus-debuginfo-1.0.0-7.el5_2.1.s390.rpm
dbus-debuginfo-1.0.0-7.el5_2.1.s390x.rpm
dbus-devel-1.0.0-7.el5_2.1.s390.rpm
dbus-devel-1.0.0-7.el5_2.1.s390x.rpm
dbus-x11-1.0.0-7.el5_2.1.s390x.rpm

x86_64:
dbus-1.0.0-7.el5_2.1.i386.rpm
dbus-1.0.0-7.el5_2.1.x86_64.rpm
dbus-debuginfo-1.0.0-7.el5_2.1.i386.rpm
dbus-debuginfo-1.0.0-7.el5_2.1.x86_64.rpm
dbus-devel-1.0.0-7.el5_2.1.i386.rpm
dbus-devel-1.0.0-7.el5_2.1.x86_64.rpm
dbus-x11-1.0.0-7.el5_2.1.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:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3834
http://www.redhat.com/security/updates/classification/#moderate

8. Contact:

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

Copyright 2009 Red Hat, Inc.
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