USN-3116-1: DBus vulnerabilities

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 14.04 LTS

Description

It was discovered that DBus incorrectly validated the source of Activation Failure signals. A local attacker could use this issue to cause a denial of service. This issue only applied to Ubuntu 12.04 LTS and Ubuntu14.04 LTS. (CVE-2015-0245)

It was discovered that DBus incorrectly handled certain format strings. A local attacker could use this issue to cause a denial of service, or possibly execute arbitrary code. This issue is only exposed to unprivileged users when the fix for CVE-2015-0245 is not applied, hence this issue is only likely to affect Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. Ubuntu 16.04LTS and Ubuntu 16.10 have been updated as a preventative measure in the event that a new attack vector for this issue is discovered.(No CVE number)

Affected Products and Versions

_Severity is medium unless otherwise noted.
_

• Cloud Foundry BOSH stemcells are vulnerable, including:
  • All versions prior to 3151.5
  • 3233.x versions prior to 3233.6
  • 3263.x versions prior to 3263.12
  • 3312.x versions prior to 3312.7
  • All other versions
• All versions of Cloud Foundry cflinuxfs2 prior to v.1.90.0

Mitigation

Users of affected versions should apply the following mitigation:

• The Cloud Foundry team recommends upgrading to the following BOSH stemcells:
  • Upgrade all lower versions of 3151.x to version 3151.5
  • Upgrade all lower versions of 3233.x to version 3233.6
  • Upgrade all lower versions of 3263.x to version 3263.12
  • Upgrade all lower versions of 3312.x to version 3312.7
• The Cloud Foundry project recommends that Cloud Foundry deployments run with cflinuxfs2 v.1.90.0 or later versions

References

• <https://www.ubuntu.com/usn/usn-3116-1&gt;
• http://people.canonical.com/~ubuntu-security/cve/2015/CVE-2015-0245