Severity

low

Vendor

VMware Tanzu

Versions Affected

• Canonical Ubuntu 16.04
• Canonical Ubuntu 18.04
• Canonical Ubuntu 22.04

Description

It was discovered that OpenSSL was not properly managing file locks when processing policy constraints. If a user or automated system were tricked into processing a certificate chain with specially crafted policy constraints, a remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 22.04 LTS and Ubuntu 22.10. (CVE-2022-3996) David Benjamin discovered that OpenSSL was not properly performing the verification of X.509 certificate chains that include policy constraints, which could lead to excessive resource consumption. If a user or automated system were tricked into processing a specially crafted X.509 certificate chain that includes policy constraints, a remote attacker could possibly use this issue to cause a denial of service. (CVE-2023-0464) David Benjamin discovered that OpenSSL was not properly handling invalid certificate policies in leaf certificates, which would result in certain policy checks being skipped for the certificate. If a user or automated system were tricked into processing a specially crafted certificate, a remote attacker could possibly use this issue to assert invalid certificate policies and circumvent policy checking. (CVE-2023-0465) David Benjamin discovered that OpenSSL incorrectly documented the functionalities of function X509_VERIFY_PARAM_add0_policy, stating that it would implicitly enable certificate policy checks when doing certificate verifications, contrary to its implementation. This could cause users and applications to not perform certificate policy checks even when expected to do so. (CVE-2023-0466) Update Instructions: Run `sudo pro fix USN-6039-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libssl-dev - 1.0.2g-1ubuntu4.20+esm7 openssl - 1.0.2g-1ubuntu4.20+esm7 libssl-doc - 1.0.2g-1ubuntu4.20+esm7 libssl1.0.0 - 1.0.2g-1ubuntu4.20+esm7 Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Affected VMware Products and Versions

Severity is low unless otherwise noted.

• Platform Automation Toolkit
  • 4.4.x versions prior to 4.4.31
  • 5.0.x versions prior to 5.0.24
  • 5.1.x versions prior to 5.1.1
• Isolation Segment
  • 2.11.x versions prior to 2.11.32, or later versions with Xenial Stemcells prior to 621.508
  • 2.13.x versions prior to 2.13.17, or later versions with Xenial Stemcells prior to 621.508
  • 3.0.x versions prior to 3.0.10, or later versions with Jammy Stemcells prior to 1.108
  • 4.0.x versions prior to 4.0.1+LTS-T, or later versions with Jammy Stemcells prior to 1.108
• Operations Manager
  • 2.10.x versions prior to 2.10.57
  • 3.0.x versions prior to 3.0.8+LTS-T
• VMware Tanzu Application Service for VMs
  • 2.11.x versions prior to 2.11.38, or later versions with Xenial Stemcells prior to 621.508
  • 2.13.x versions prior to 2.13.20, or later versions with Xenial Stemcells prior to 621.508
  • 3.0.x versions prior to 3.0.10, or later versions with Jammy Stemcells prior to 1.108
  • 4.0.x versions prior to 4.0.1+LTS-T, or later versions with Jammy Stemcells prior to 1.108

Mitigation

Users of affected products are strongly encouraged to follow the mitigation below. On the Tanzu 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:

• Platform Automation Toolkit
  • 4.4.31
  • 5.0.24
  • 5.1.1
• Isolation Segment
  • 2.11.32, and upgrade Xenial Stemcells to 621.508 or greater
  • 2.13.17, and upgrade Xenial Stemcells to 621.508 or greater
  • 3.0.10, and upgrade Jammy Stemcells to 1.108 or greater
  • 4.0.1+LTS-T, and upgrade Jammy Stemcells to 1.108 or greater
• Operations Manager
  • 2.10.57
  • 3.0.8+LTS-T
• VMware Tanzu Application Service for VMs
  • 2.11.38, and upgrade Xenial Stemcells to 621.508 or greater
  • 2.13.20, and upgrade Xenial Stemcells to 621.508 or greater
  • 3.0.10, and upgrade Jammy Stemcells to 1.108 or greater
  • 4.0.1+LTS-T, and upgrade Jammy Stemcells to 1.108 or greater

References

• https://ubuntu.com/security/notices/USN-6039-1
• https://cloudfoundry.org/blog/usn-6039-1

History

2023-05-22: Initial vulnerability report published.