Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 16.04

Description

Florian Weimer discovered that Sudo incorrectly handled the noexec restriction when used with certain applications. A local attacker could possibly use this issue to bypass configured restrictions and execute arbitrary commands. (CVE-2016-7076)

It was discovered that Sudo did not properly parse the contents of /proc/[pid]/stat when attempting to determine its controlling tty. A local attacker in some configurations could possibly use this to overwrite any file on the filesystem, bypassing intended permissions. (CVE-2017-1000368)

CVEs contained in this USN include: CVE-2016-7076, CVE-2017-1000368

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• Cloud Foundry BOSH xenial-stemcells are vulnerable, including:
  • 315.x versions prior to 315.26
  • 250.x versions prior to 250.48
  • 170.x versions prior to 170.69
  • 97.x versions prior to 97.96
  • All other stemcells not listed.

Mitigation

Users of affected products are strongly encouraged to follow one of the mitigations below:

• The Cloud Foundry project recommends upgrading the following BOSH xenial-stemcells:
  • Upgrade 315.x versions to 315.26
  • Upgrade 250.x versions to 250.48
  • Upgrade 170.x versions to 170.69
  • Upgrade 97.x versions to 97.96
  • All other stemcells should be upgraded to the latest version available on bosh.io.

References

• USN-3968-1
• CVE-2016-7076
• CVE-2017-1000368