Covenant through 0.6 registers the CovenantHub SignalR hub without an Authorize attribute, allowing unauthenticated callers to invoke CreateHttpListener and receive a signed JWT token. Attackers can use the obtained token to authenticate against the entire operator API and access grunts, credentials, binaries, events, and the operator roster.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 5
https://github.com/cobbr/Covenant
disclosure@vulncheck.com
https://github.com/cobbr/Covenant/blob/v0.6/Covenant/Core/CovenantService.cs#L3…
disclosure@vulncheck.com
https://github.com/cobbr/Covenant/blob/v0.6/Covenant/Hubs/CovenantHub.cs#L28-L33
disclosure@vulncheck.com
https://github.com/cobbr/Covenant/issues/406
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/covenant-through-0.6-missing-authenticatio…
disclosure@vulncheck.com