Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 14.04
• Canonical Ubuntu 16.04
• Canonical Ubuntu 18.04

Description

Harry Sintonen discovered that curl incorrectly handled SASL authentication. A remote attacker could use this issue to cause curl to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2018-16839)

Brian Carpenter discovered that curl incorrectly handled memory when closing certain handles. A remote attacker could use this issue to cause curl to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2018-16840)

Brian Carpenter discovered that the curl command-line tool incorrectly handled error messages. A remote attacker could possibly use this issue to obtain sensitive information. (CVE-2018-16842)

CVEs contained in this USN include: CVE-2018-16839, CVE-2018-16840, CVE-2018-16842

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• Cloud Foundry BOSH trusty-stemcells are vulnerable, including:
  • 3586.x versions prior to 3586.54
  • 3541.x versions prior to 3541.59
  • 3468.x versions prior to 3468.86
  • 3445.x versions prior to 3445.81
  • 3421.x versions prior to 3421.98
  • All other stemcells not listed.
• Cloud Foundry BOSH xenial-stemcells are vulnerable, including:
  • 170.x versions prior to 170.5
  • 97.x versions prior to 97.31
  • All other stemcells not listed.
• All versions of Cloud Foundry cflinuxfs2 prior to 1.245.0
• All versions of Cloud Foundry cflinuxfs3 prior to 0.34.0

Mitigation

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

• The Cloud Foundry project recommends upgrading the following BOSH trusty-stemcells:
  • Upgrade 3586.x versions to 3586.54
  • Upgrade 3541.x versions to 3541.59
  • Upgrade 3468.x versions to 3468.86
  • Upgrade 3445.x versions to 3445.81
  • Upgrade 3421.x versions to 3421.98
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• The Cloud Foundry project recommends upgrading the following BOSH xenial-stemcells:
  • Upgrade 170.x versions to 170.5
  • Upgrade 97.x versions to 97.31
  • 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 1.245.0 or later.
• The Cloud Foundry project recommends that Cloud Foundry deployments run with cflinuxfs3 version 0.34.0 or later.

References

• USN-3805-1
• CVE-2018-16839
• CVE-2018-16840
• CVE-2018-16842