GitLab CE/EE Denial-of-Service Vulnerability in GraphQL API

A denial-of-service vulnerability has been identified in GitLab Community Edition (CE) and Enterprise Edition (EE) versions 13.0 prior to 18.8.9, 18.9 prior to 18.9.5, and 18.10 prior to 18.10.3. This vulnerability could have allowed an unauthenticated user to disrupt service by sending repeated GraphQL queries, causing a strain on the server.

Impact

Exploitation of this vulnerability could lead to a denial-of-service condition, causing the GitLab instance to become unresponsive or slow down significantly.

Remediation

Users are advised to upgrade to GitLab versions 18.10.3, 18.9.5, or 18.8.9. Instructions for updating GitLab can be found in the GitLab Update documentation. Note that the SLES 12.5 packages for 18.10.3 and 18.9.5 are not present in this release.