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Ubuntu 14.04 LTS USN-2275-1 Critical DBus Access Control Threat

ubuntu
Calendar Grey July 8, 2014
Scroller Ubuntu
Multiple security flaws addressed in DBus impact Ubuntu 14.04 LTS, 13.10, and 12.04 LTS platforms, necessitating updates.
Several security issues were fixed in DBus.

Summary

Several security issues were fixed in DBus.

Software Description:

- dbus: simple interprocess messaging system

Details:

Alban Crequy discovered that dbus-daemon incorrectly sent AccessDenied

errors to the service instead of the client when enforcing permissions. A

local user can use this issue to possibly deny access to the service.

(CVE-2014-3477)

Alban Crequy discovered that dbus-daemon incorrectly handled certain file

descriptors. A local attacker could use this issue to cause services or

clients to disconnect, resulting in a denial of service. (CVE-2014-3532,

CVE-2014-3533)

Topics%20covered

Topics Covered

security advisory denial of service critical access control ubuntu dbus

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 14.04 LTS:
  dbus                            1.6.18-0ubuntu4.1
  libdbus-1-3                     1.6.18-0ubuntu4.1

Ubuntu 13.10:
  dbus                            1.6.12-0ubuntu10.1
  libdbus-1-3                     1.6.12-0ubuntu10.1

Ubuntu 12.04 LTS:
  dbus                            1.4.18-1ubuntu1.5
  libdbus-1-3                     1.4.18-1ubuntu1.5

After a standard system update you need to reboot your computer to make all
the necessary changes.

References

https://ubuntu.com/security/notices/USN-2275-1

CVE-2014-3477, CVE-2014-3532, CVE-2014-3533

Severity
critical
Lowest
Low
Medium
High
Critical

July 08, 2014

Topics%20covered

Topics Covered

security advisory denial of service critical access control ubuntu dbus

Package Information

https://launchpad.net/ubuntu/+source/dbus/1.6.18-0ubuntu4.1
https://launchpad.net/ubuntu/+source/dbus/1.6.12-0ubuntu10.1
https://launchpad.net/ubuntu/+source/dbus/1.4.18-1ubuntu1.5

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