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Security Advisory

USN-6616-1: OpenLDAP vulnerability




Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 22.04


It was discovered that OpenLDAP was not properly performing bounds checks when executing functions related to LDAP URLs. An attacker could possibly use this issue to cause a denial of service. Update Instructions: Run `sudo pro fix USN-6616-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libldap-2.4-2 – 2.4.49+dfsg-2ubuntu1.10 libldap-common – 2.4.49+dfsg-2ubuntu1.10 slapd-contrib – 2.4.49+dfsg-2ubuntu1.10 slapi-dev – 2.4.49+dfsg-2ubuntu1.10 slapd-smbk5pwd – 2.4.49+dfsg-2ubuntu1.10 ldap-utils – 2.4.49+dfsg-2ubuntu1.10 libldap2-dev – 2.4.49+dfsg-2ubuntu1.10 slapd – 2.4.49+dfsg-2ubuntu1.10 No subscription required

CVEs contained in this USN include: CVE-2023-2953.

Affected Cloud Foundry Products and Versions

Severity is low unless otherwise noted.

  • cflinuxfs4
    • All versions prior to 1.69.0
  • Jammy Stemcells
    • 1.x versions prior to 1.360
    • All other stemcells not listed.
  • CF Deployment
    • All versions with Jammy Stemcells prior to 1.360


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 1.69.0 or greater
  • Jammy Stemcells
    • Upgrade 1.x versions to 1.360 or greater
    • All other stemcells should be upgraded to the latest version available on
  • CF Deployment
    • For all versions, upgrade Jammy Stemcells to 1.360 or greater


2024-02-29: Initial vulnerability report published.

Cloud Foundry Foundation Security Team Profile Image

Cloud Foundry Foundation Security Team, AUTHOR