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Security Advisory

USN-3968-1: Sudo vulnerabilities

USN-3968-1: Sudo vulnerabilities




Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 16.04


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.


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


Cloud Foundry Foundation Security Team Profile Image

Cloud Foundry Foundation Security Team, AUTHOR