Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 14.04

Description

Hubert Kario discovered that GnuTLS incorrectly handled decoding a status response TLS extension. A remote attacker could possibly use this issue to cause GnuTLS to crash, resulting in a denial of service. This issue only applied to Ubuntu 16.04 LTS, Ubuntu 16.10 and Ubuntu 17.04. (CVE-2017-7507)

It was discovered that GnuTLS incorrectly handled decoding certain OpenPGP certificates. A remote attacker could use this issue to cause GnuTLS to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2017-7869)

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• Cloud Foundry BOSH stemcells are vulnerable, including:
  • 3263.x versions prior to 3263.28
  • 3312.x versions prior to 3312.29
  • 3363.x versions prior to 3363.26
  • 3421.x versions prior to 3421.9
  • All other stemcells not listed.
• All versions of Cloud Foundry cflinuxfs2 prior to 1.131.0

Mitigation

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

• The Cloud Foundry project recommends upgrading the following BOSH stemcells:
  • Upgrade 3263.x versions prior to 3263.28
  • Upgrade 3312.x versions prior to 3312.29
  • Upgrade 3363.x versions prior to 3363.26
  • Upgrade 3421.x versions prior to 3421.9
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• The Cloud Foundry project recommends that Cloud Foundry deployments run with cflinuxfs2 version 1.131.0 or later.

References

• USN-3318-1
• CVE-2017-7507
• CVE-2017-7869