An issue has been discovered in GitLab CE/EE affecting all versions starting from 17.0 prior to 17.6.4, from 17.7 prior to 17.7.3, and from 17.8 prior to 17.8.1. Under certain conditions, it may have been possible for users with developer role to exfiltrate protected CI variables via CI lint.
Solution:
The product implements access controls via a policy or other feature with the intention to disable or restrict accesses (reads and/or writes) to assets in a system from untrusted agents. However, implemented access controls lack required granularity, which renders the control policy too broad because it allows accesses from unauthorized agents to the security-sensitive assets.