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USN-5828-1: Kerberos vulnerabilities

Severity

Medium

Vendor

VMware Tanzu

Versions Affected

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

Description

It was discovered that Kerberos incorrectly handled certain S4U2Self requests. An attacker could possibly use this issue to cause a denial of service. This issue was only addressed in Ubuntu 16.04 ESM and Ubuntu 18.04 LTS. (CVE-2018-20217) Greg Hudson discovered that Kerberos PAC implementation incorrectly handled certain parsing operations. A remote attacker could use this issue to cause a denial of service, or possibly execute arbitrary code. (CVE-2022-42898) Update Instructions: Run `sudo pro fix USN-5828-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libkadm5srv-mit9 - 1.13.2+dfsg-5ubuntu2.2+esm3 krb5-doc - 1.13.2+dfsg-5ubuntu2.2+esm3 krb5-user - 1.13.2+dfsg-5ubuntu2.2+esm3 libgssrpc4 - 1.13.2+dfsg-5ubuntu2.2+esm3 libkrb5support0 - 1.13.2+dfsg-5ubuntu2.2+esm3 libk5crypto3 - 1.13.2+dfsg-5ubuntu2.2+esm3 libkrb5-dev - 1.13.2+dfsg-5ubuntu2.2+esm3 krb5-pkinit - 1.13.2+dfsg-5ubuntu2.2+esm3 libkrb5-3 - 1.13.2+dfsg-5ubuntu2.2+esm3 krb5-kdc-ldap - 1.13.2+dfsg-5ubuntu2.2+esm3 krb5-otp - 1.13.2+dfsg-5ubuntu2.2+esm3 libkadm5clnt-mit9 - 1.13.2+dfsg-5ubuntu2.2+esm3 krb5-gss-samples - 1.13.2+dfsg-5ubuntu2.2+esm3 krb5-multidev - 1.13.2+dfsg-5ubuntu2.2+esm3 krb5-locales - 1.13.2+dfsg-5ubuntu2.2+esm3 libgssapi-krb5-2 - 1.13.2+dfsg-5ubuntu2.2+esm3 krb5-kdc - 1.13.2+dfsg-5ubuntu2.2+esm3 libkrad-dev - 1.13.2+dfsg-5ubuntu2.2+esm3 libkdb5-8 - 1.13.2+dfsg-5ubuntu2.2+esm3 krb5-k5tls - 1.13.2+dfsg-5ubuntu2.2+esm3 libkrad0 - 1.13.2+dfsg-5ubuntu2.2+esm3 krb5-admin-server - 1.13.2+dfsg-5ubuntu2.2+esm3 Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

CVEs contained in this USN include: CVE-2018-20217, CVE-2022-42898

Affected VMware Products and Versions

Severity is medium unless otherwise noted.

• Platform Automation Toolkit
  • 4.4.x versions prior to 4.4.31
  • 5.0.x versions prior to 5.0.24

• Isolation Segment
  • 2.11.x versions prior to 2.11.29, or later versions with Xenial Stemcells prior to 621.418
  • 2.12.x versions prior to 2.12.19, or later versions with Xenial Stemcells prior to 621.418
  • 2.13.x versions prior to 2.13.14, or later versions with Xenial Stemcells prior to 621.418
  • 3.0.x versions prior to 3.0.7, or later versions with Jammy Stemcells prior to 1.83
  • 4.0.x versions with Jammy Stemcells prior to 1.83

• Operations Manager
  • 2.10.x versions prior to 2.10.53
  • 3.0.x versions prior to 3.0.4

• VMware Tanzu Application Service for VMs
  • 2.11.x versions prior to 2.11.35, or later versions with Xenial Stemcells prior to 621.418
  • 2.12.x versions prior to 2.12.24, or later versions with Xenial Stemcells prior to 621.418
  • 2.13.x versions prior to 2.13.17, or later versions with Xenial Stemcells prior to 621.418
  • 3.0.x versions prior to 3.0.7, or later versions with Jammy Stemcells prior to 1.83
  • 4.0.x versions with Jammy Stemcells prior to 1.83

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
  • 5.1.0

• Isolation Segment
  • 2.11.29, and upgrade Xenial Stemcells to 621.418 or greater
  • 2.12.19, and upgrade Xenial Stemcells to 621.418 or greater
  • 2.13.14, and upgrade Xenial Stemcells to 621.418 or greater
  • 3.0.7, and upgrade Jammy Stemcells to 1.83 or greater
  • 4.0.x: Upgrade Jammy Stemcells to 1.83 or greater

• Operations Manager
  • 2.10.53
  • 3.0.4

• VMware Tanzu Application Service for VMs
  • 2.11.35, and upgrade Xenial Stemcells to 621.418 or greater
  • 2.12.24, and upgrade Xenial Stemcells to 621.418 or greater
  • 2.13.17, and upgrade Xenial Stemcells to 621.418 or greater
  • 3.0.7, and upgrade Jammy Stemcells to 1.83 or greater
  • 4.0.x: Upgrade Jammy Stemcells to 1.83 or greater

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20217
• https://ubuntu.com/security/CVE-2022-42898
• https://ubuntu.com/security/notices/USN-5828-1
• https://cloudfoundry.org/blog/usn-5828-1

History

2023-06-29: Initial vulnerability report published.