All Vulnerability Reports

USN-3999-1: GnuTLS vulnerabilities


Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected
  • Canonical Ubuntu 16.04
  • Canonical Ubuntu 18.04
Description

Eyal Ronen, Kenneth G. Paterson, and Adi Shamir discovered that GnuTLS was vulnerable to a timing side-channel attack known as the "Lucky Thirteen" issue. A remote attacker could possibly use this issue to perform plaintext-recovery attacks via analysis of timing data. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2018-10844, CVE-2018-10845, CVE-2018-10846)

Tavis Ormandy discovered that GnuTLS incorrectly handled memory when verifying certain X.509 certificates. A remote attacker could use this issue to cause GnuTLS to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 18.04 LTS, Ubuntu 18.10, and Ubuntu 19.04. (CVE-2019-3829)

It was discovered that GnuTLS incorrectly handled certain post-handshake messages. A remote attacker could use this issue to cause GnuTLS to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 18.10 and Ubuntu 19.04. (CVE-2019-3836)

CVEs contained in this USN include: CVE-2018-10844, CVE-2018-10845, CVE-2018-10846, CVE-2019-3829, CVE-2019-3836

Affected Pivotal Products and Versions

Severity is medium unless otherwise noted.

Vulnerable Cloud Foundry components individually listed here. Impacted stemcells may be updated independently of upgrading Pivotal Application Service, Pivotal Container Service, or PCF Isolation Segment.

  • Pivotal Application Service
    • 2.5.x versions prior to 2.5.5
    • 2.4.x versions prior to 2.4.9
    • 2.3.x versions prior to 2.3.13
  • PCF Isolation Segment
    • 2.5.x versions prior to 2.5.5
    • 2.4.x versions prior to 2.4.10
    • 2.3.x versions prior to 2.3.13
  • Pivotal Operations Manager
    • 2.6.x versions prior to 2.6.1
    • 2.5.x versions prior to 2.5.7
    • 2.4.x versions prior to 2.4.14
    • 2.3.x versions prior to 2.3.20
  • PCF Container Service
    • 1.3.x versions prior to 1.3.8
    • 1.4.x versions prior to 1.4.2
  • Pivotal Greenplum for Kubernetes
    • All versions prior to 1.3.2
  • Platform Automation for PCF
    • All versions prior to 3.0.2
Mitigation

Users of affected products are strongly encouraged to follow one of the mitigations below. The Cloud Foundry security team recommends upgrading BOSH to the affected OSS components listed here if applicable. Upgrade Pivotal products that use earlier versions of CF components to new Pivotal releases using new versions linked above. On the Pivotal Network product page for each release, check the Depends On section and/or Release Notes for this information. Releases that have fixed this issue include.

  • Pivotal Application Service
    • 2.5.5
    • 2.4.9
    • 2.3.13
  • PCF Isolation Segment
    • 2.5.5
    • 2.4.10
    • 2.3.13
  • Pivotal Operations Manager
    • 2.6.1
    • 2.5.7
    • 2.4.14
    • 2.3.20
  • Pivotal Container Service
    • 1.3.8
    • 1.4.2
  • Pivotal Greenplum for Kubernetes
    • 1.3.2
  • Platform Automation for PCF
    • 3.0.2
References