USN-6592-1: libssh vulnerabilities | Cloud Foundry

Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 22.04

Description

It was discovered that libssh incorrectly handled the ProxyCommand and the ProxyJump features. A remote attacker could possibly use this issue to inject malicious code into the command of the features mentioned through the hostname parameter. (CVE-2023-6004) It was discovered that libssh incorrectly handled return codes when performing message digest operations. A remote attacker could possibly use this issue to cause libssh to crash, obtain sensitive information, or execute arbitrary code. (CVE-2023-6918) Update Instructions: Run sudo pro fix USN-6592-1 to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libssh-gcrypt-dev – 0.9.3-2ubuntu2.5 libssh-4 – 0.9.3-2ubuntu2.5 libssh-gcrypt-4 – 0.9.3-2ubuntu2.5 libssh-dev – 0.9.3-2ubuntu2.5 libssh-doc – 0.9.3-2ubuntu2.5 No subscription required

CVEs contained in this USN include: CVE-2023-6004, CVE-2023-6918.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• cflinuxfs4
  • All versions prior to 1.67.0
• Jammy Stemcells
  • 1.x versions prior to 1.351
  • All other stemcells not listed.
• CF Deployment
  • All versions with Jammy Stemcells prior to 1.351

Mitigation

Users of affected products are strongly encouraged to follow the mitigations below.

The Cloud Foundry project recommends upgrading the following releases:

• cflinuxfs4
  • Upgrade all versions to 1.67.0 or greater
• Jammy Stemcells
  • Upgrade 1.x versions to 1.351 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• CF Deployment
  • For all versions, upgrade Jammy Stemcells to 1.351 or greater

References

• USN Notice
• CVE-2023-6004
• CVE-2023-6918

History

2024-02-29: Initial vulnerability report published.