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The maintainers of the NGINX web server project have issued mitigations to address security weaknesses in its Lightweight Directory Access Protocol (LDAP) Reference Implementation.

“NGINX Open Source and NGINX Plus are not themselves affected, and no corrective action is necessary if you do not use the reference implementation,” Liam Crilly and Timo Stark of F5 Networks said in an advisory published Monday.

NGINX said that the reference implementation, which uses LDAP to authenticate users, is impacted only under three conditions if the deployments involve –

  • Command-line parameters to configure the Python-based reference implementation daemon
  • Unused, optional configuration parameters, and
  • Specific group membership to carry out LDAP authentication

images from Hacker News