Severity

medium

Vendor

VMware Tanzu

Versions Affected

• Canonical Ubuntu 22.04

Description

Philip Turnbull discovered that libssh incorrectly handled rekeying with algorithm guessing. A remote attacker could use this issue to cause libssh to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2023-1667) Kevin Backhouse discovered that libssh incorrectly handled verifying data signatures. A remote attacker could possibly use this issue to bypass authorization. (CVE-2023-2283) Update Instructions: Run `sudo pro fix USN-6138-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libssh-gcrypt-dev - 0.9.6-2ubuntu0.22.04.1 libssh-doc - 0.9.6-2ubuntu0.22.04.1 libssh-4 - 0.9.6-2ubuntu0.22.04.1 libssh-dev - 0.9.6-2ubuntu0.22.04.1 libssh-gcrypt-4 - 0.9.6-2ubuntu0.22.04.1 No subscription required

CVEs contained in this USN include: CVE-2023-1667, CVE-2023-2283

Affected VMware Products and Versions

Severity is medium unless otherwise noted.

• Isolation Segment
  • 3.0.x versions prior to 3.0.13, or later versions with Jammy Stemcells prior to 1.147
  • 4.0.x versions prior to 4.0.4, or later versions with Jammy Stemcells prior to 1.147
• Operations Manager
  • 3.0.x versions prior to 3.0.12+LTS-T
• VMware Tanzu Application Service for VMs
  • 3.0.x versions prior to 3.0.13, or later versions with Jammy Stemcells prior to 1.147
  • 4.0.x versions prior to 4.0.4, or later versions with Jammy Stemcells prior to 1.147

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:

• Isolation Segment
  • 3.0.13, and upgrade Jammy Stemcells to 1.147 or greater
  • 4.0.4, and upgrade Jammy Stemcells to 1.147 or greater
• Operations Manager
  • 3.0.12+LTS-T
• VMware Tanzu Application Service for VMs
  • 3.0.13, and upgrade Jammy Stemcells to 1.147 or greater
  • 4.0.4, and upgrade Jammy Stemcells to 1.147 or greater

References

• https://ubuntu.com/security/CVE-2023-1667
• https://ubuntu.com/security/CVE-2023-2283
• https://ubuntu.com/security/notices/USN-6138-1
• https://cloudfoundry.org/blog/usn-6138-1

History

2023-06-29: Initial vulnerability report published.