CMAK through 3.0.0.6 fails to apply the scheduled leader election feature toggle to HTML form routes, allowing attackers to bypass the feature gate. Attackers can access the form endpoints to start and stop the recurring election scheduler, disrupting leadership across managed Kafka clusters.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
Low
Partial data modification
Availability
Low
Partial disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://github.com/yahoo/CMAK
disclosure@vulncheck.com
https://github.com/yahoo/CMAK/blob/3.0.0.6/app/controllers/PreferredReplicaElec…
disclosure@vulncheck.com
https://github.com/yahoo/CMAK/issues/936
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/cmak-through-3.0.0.6-feature-gate-bypass-v…
disclosure@vulncheck.com