Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 14.04

Description

Keegan Ryan discovered that OpenSSL incorrectly handled ECDSA key generation. An attacker could possibly use this issue to perform a cache-timing attack and recover private ECDSA keys. (CVE-2018-0495)

Guido Vranken discovered that OpenSSL incorrectly handled very large prime values during a key agreement. A remote attacker could possibly use this issue to consume resources, leading to a denial of service. (CVE-2018-0732)

Alejandro Cabrera Aldaya, Billy Brumley, Cesar Pereida Garcia and Luis Manuel Alvarez Tapia discovered that OpenSSL incorrectly handled RSA key generation. An attacker could possibly use this issue to perform a cache-timing attack and recover private RSA keys. (CVE-2018-0737)

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• Cloud Foundry BOSH stemcells are vulnerable, including:
  • 3586.x versions prior to 3586.25
  • 3541.x versions prior to 3541.35
  • 3468.x versions prior to 3468.53
  • 3445.x versions prior to 3445.53
  • 3421.x versions prior to 3421.68
  • 3363.x versions prior to 3363.67
  • All other stemcells not listed.
• All versions of Cloud Foundry cflinuxfs2 prior to 1.221.0

Mitigation

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

• The Cloud Foundry project recommends upgrading the following BOSH stemcells:
  • Upgrade 3586.x versions to 3586.25
  • Upgrade 3541.x versions to 3541.35
  • Upgrade 3468.x versions to 3468.53
  • Upgrade 3445.x versions to 3445.53
  • Upgrade 3421.x versions to 3421.68
  • Upgrade 3363.x versions to 3363.67
  • 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 1.221.0 or later.

References

• USN-3692-1
• CVE-2018-0495
• CVE-2018-0732
• CVE-2018-0737