Red Hat Security Advisory: dbus security update Security Advisory secalert@redhat.com Red Hat Security Response Team RHSA-2012:1261 Final 1 1 2012-09-13T16:43:00Z Current version 2012-09-13T16:43:00Z 2012-09-13T16:43:00Z Red Hat rhsa-to-cvrf 1.0.1484 2012-09-13T16:51:02Z Updated dbus packages that fix one security issue are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having moderate 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. 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. It was discovered that the D-Bus library honored environment settings even when running with elevated privileges. A local attacker could possibly use this flaw to escalate their privileges, by setting specific environment variables before running a setuid or setgid application linked against the D-Bus library (libdbus). (CVE-2012-3524) Note: With this update, libdbus ignores environment variables when used by setuid or setgid applications. The environment is not ignored when an application gains privileges via file system capabilities; however, no application shipped in Red Hat Enterprise Linux 6 gains privileges via file system capabilities. Red Hat would like to thank Sebastian Krahmer of the SUSE Security Team for reporting this issue. All users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. For the update to take effect, all running instances of dbus-daemon and all running applications using the libdbus library must be restarted, or the system rebooted. Please see https://www.redhat.com/footer/terms-of-use.html Copyright © 2012 Red Hat, Inc. All rights reserved. Moderate https://rhn.redhat.com/errata/RHSA-2012-1261.html https://rhn.redhat.com/errata/RHSA-2012-1261.html https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/security/updates/classification/#moderate Red Hat Enterprise Linux HPC Node Optional (v. 6) Red Hat Enterprise Linux Server (v. 6) Red Hat Enterprise Linux Workstation (v. 6) Red Hat Enterprise Linux Desktop Optional (v. 6) Red Hat Enterprise Linux Workstation Optional (v. 6) Red Hat Enterprise Linux HPC Node (v. 6) Red Hat Enterprise Linux Desktop (v. 6) Red Hat Enterprise Linux Server Optional (v. 6) dbus-1.2.24-7.el6_3.src.rpm dbus-1.2.24-7.el6_3 as a component of Red Hat Enterprise Linux HPC Node Optional (v. 6) dbus-1.2.24-7.el6_3 as a component of Red Hat Enterprise Linux Server (v. 6) dbus-1.2.24-7.el6_3 as a component of Red Hat Enterprise Linux Workstation (v. 6) dbus-1.2.24-7.el6_3 as a component of Red Hat Enterprise Linux Desktop Optional (v. 6) dbus-1.2.24-7.el6_3 as a component of Red Hat Enterprise Linux Workstation Optional (v. 6) dbus-1.2.24-7.el6_3 as a component of Red Hat Enterprise Linux HPC Node (v. 6) dbus-1.2.24-7.el6_3 as a component of Red Hat Enterprise Linux Desktop (v. 6) dbus-1.2.24-7.el6_3 as a component of Red Hat Enterprise Linux Server Optional (v. 6) It was discovered that the D-Bus library honored environment settings even when running with elevated privileges. A local attacker could possibly use this flaw to escalate their privileges, by setting specific environment variables before running a setuid or setgid application linked against the D-Bus library (libdbus). 2012-07-27T00:00:00Z 2012-09-12T00:00:00Z CVE-2012-3524 6Client-6.3.z:dbus-1.2.24-7.el6_3 6Client-optional-6.3.z:dbus-1.2.24-7.el6_3 6ComputeNode-6.3.z:dbus-1.2.24-7.el6_3 6ComputeNode-optional-6.3.z:dbus-1.2.24-7.el6_3 6Server-6.3.z:dbus-1.2.24-7.el6_3 6Server-optional-6.3.z:dbus-1.2.24-7.el6_3 6Workstation-6.3.z:dbus-1.2.24-7.el6_3 6Workstation-optional-6.3.z:dbus-1.2.24-7.el6_3 Moderate 6.9 AV:L/AC:M/Au:N/C:C/I:C/A:C 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 https://rhn.redhat.com/errata/RHSA-2012-1261.html https://www.redhat.com/security/data/cve/CVE-2012-3524.html CVE-2012-3524 https://bugzilla.redhat.com/show_bug.cgi?id=847402 bz#847402: CVE-2012-3524 X.org: arbitrary code execution as root when libdbus >= 1.5 is used Red Hat would like to thank Sebastian Krahmer of the SUSE Security Team for reporting this issue.