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Security Advisory

USN-5845-1: OpenSSL vulnerabilities




Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 18.04


David Benjamin discovered that OpenSSL incorrectly handled X.400 address processing. A remote attacker could possibly use this issue to read arbitrary memory contents or cause OpenSSL to crash, resulting in a denial of service. (CVE-2023-0286) Octavio Galland and Marcel Böhme discovered that OpenSSL incorrectly handled streaming ASN.1 data. A remote attacker could use this issue to cause OpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2023-0215) Update Instructions: Run `sudo pro fix USN-5845-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libssl1.0.0 – 1.0.2n-1ubuntu5.11 openssl1.0 – 1.0.2n-1ubuntu5.11 libssl1.0-dev – 1.0.2n-1ubuntu5.11 No subscription required

CVEs contained in this USN include: CVE-2023-0215, CVE-2023-0286.

Affected Cloud Foundry Products and Versions

Severity is high unless otherwise noted.

  • Bionic Stemcells
    • 1.x versions prior to 1.174
    • All other stemcells not listed.
  • cflinuxfs3
    • All versions prior to 0.351.0
  • CF Deployment
    • All versions prior to 26.4.0, or later versions with Bionic Stemcells prior to 1.174


Users of affected products are strongly encouraged to follow the mitigations below. The Cloud Foundry project recommends upgrading the following releases:

  • Bionic Stemcells
    • Upgrade 1.x versions to 1.174 or greater
    • All other stemcells should be upgraded to the latest version available on
  • cflinuxfs3
    • Upgrade all versions to 0.351.0 or greater
  • CF Deployment
    • Upgrade all versions to 26.4.0 or greater and upgrade Bionic Stemcells to 1.174 or greater



2023-02-24: Initial vulnerability report published.

Cloud Foundry Foundation Security Team Profile Image

Cloud Foundry Foundation Security Team, AUTHOR