USN-3840-1: OpenSSL vulnerabilities
Severity
Low
Vendor
Canonical Ubuntu
Versions Affected
- Canonical Ubuntu 14.04
- Canonical Ubuntu 16.04
- Canonical Ubuntu 18.04
Description
Samuel Weiser discovered that OpenSSL incorrectly handled DSA signing. An attacker could possibly use this issue to perform a timing side-channel attack and recover private DSA keys. (CVE-2018-0734)
Samuel Weiser discovered that OpenSSL incorrectly handled ECDSA signing. An attacker could possibly use this issue to perform a timing side-channel attack and recover private ECDSA keys. This issue only affected Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018-0735)
Billy Bob Brumley, Cesar Pereida Garcia, Sohaib ul Hassan, Nicola Tuveri, and Alejandro Cabrera Aldaya discovered that Simultaneous Multithreading (SMT) architectures are vulnerable to side-channel leakage. This issue is known as “PortSmash”. An attacker could possibly use this issue to perform a timing side-channel attack and recover private keys. (CVE-2018-5407)
CVEs contained in this USN include: CVE-2018-0734, CVE-2018-0735, CVE-2018-5407
Affected Cloud Foundry Products and Versions
Severity is low unless otherwise noted.
- Cloud Foundry BOSH trusty-stemcells are vulnerable, including:
- 3586.x versions prior to 3586.65
- 3541.x versions prior to 3541.69
- 3468.x versions prior to 3468.90
- 3445.x versions prior to 3445.87
- 3421.x versions prior to 3421.104
- All other stemcells not listed.
- Cloud Foundry BOSH xenial-stemcells are vulnerable, including:
- 170.x versions prior to 170.14
- 97.x versions prior to 97.41
- All other stemcells not listed.
- All versions of Cloud Foundry cflinuxfs2 prior to 1.254.0
- All versions of Cloud Foundry cflinuxfs3 prior to 0.46.0
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 3586.65
- Upgrade 3541.x versions to 3541.69
- Upgrade 3468.x versions to 3468.90
- Upgrade 3445.x versions to 3445.87
- Upgrade 3421.x versions to 3421.104
- 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 170.14
- Upgrade 97.x versions to 97.41
- 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 1.254.0 or later.
- The Cloud Foundry project recommends that Cloud Foundry deployments run with cflinuxfs3 version 0.46.0 or later.
