Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 14.04 LTS

Description

Ondrej Kozina discovered that the keyring interface in the Linux kernel contained a buffer overflow when displaying timeout events via the /proc/keys interface. A local attacker could use this to cause a denial of service (system crash).

Affected Cloud Foundry 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 3312.5
• All other unmaintained versions are potentially vulnerable.

Mitigation

OSS users are strongly encouraged to follow one of the mitigations below:

The Cloud Foundry project recommends upgrading to the following BOSH stemcells:

• Upgrade all older versions to 3151.5 or later
• Upgrade 3233.x versions to 3233.6 or later
• Upgrade 3263.x versions to 3263.12 or later
• Upgrade 3312.x versions to 3312.5 or later
• Upgrade all other unmaintained versions to the most recent version of a maintained version line.

Credit

Ondrej Kozina

References

• https://www.ubuntu.com/usn/usn-3128-2/
• http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-7042.html
• http://bosh.io