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Security Advisory

USN-5892-1: NSS vulnerabilities




Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 18.04


It was discovered that NSS incorrectly handled client authentication without a user certificate in the database. A remote attacker could possibly use this issue to cause a NSS client to crash, resulting in a denial of service. This issue only affected Ubuntu 22.10. (CVE-2022-3479) Christian Holler discovered that NSS incorrectly handled certain PKCS 12 certificated bundles. A remote attacker could use this issue to cause NSS to crash, leading to a denial of service, or possibly execute arbitrary code. (CVE-2023-0767) Update Instructions: Run `sudo pro fix USN-5892-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libnss3-dev – 2:3.35-2ubuntu2.16 libnss3 – 2:3.35-2ubuntu2.16 libnss3-tools – 2:3.35-2ubuntu2.16 No subscription required

CVEs contained in this USN include: CVE-2023-0767, CVE-2022-3479.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

  • Bionic Stemcells
    • 1.x versions prior to 1.181
    • All other stemcells not listed.
  • CF Deployment
    • All versions with Bionic Stemcells prior to 1.181


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 1.181 or greater
    • All other stemcells should be upgraded to the latest version available on
  • CF Deployment
    • For all versions, upgrade Bionic Stemcells to 1.181 or greater


2023-06-30: Initial vulnerability report published.

Cloud Foundry Foundation Security Team Profile Image

Cloud Foundry Foundation Security Team, AUTHOR