In Calico, the install-cni init container logs the rendered CNI configuration to standard output. When the configuration template uses the __SERVICEACCOUNT_TOKEN__ placeholder (Canal/Flannel-Calico deployments), the installer substitutes the live Kubernetes ServiceAccount bearer token before logging, exposing the token to any authenticated user with pods/log permission in the namespace with calico-node. The token holds patch privileges on pods/status, enabling annotation-based attacks against cluster workloads.
The default kubeconfig-based authentication path is not affected. This is a direct regression of TTA-2018-001.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 4
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Tigera Calico
cpe:2.3:a:tigera:calico:*:*:*:*:enterprise:*:*:*
|
— |
3.21.7
|
|
Tigera Calico
cpe:2.3:a:tigera:calico:*:*:*:*:open_source:*:*:*
|
— |
3.32.0
|
|
Tigera Calico
cpe:2.3:a:tigera:calico:*:*:*:*:cloud:*:*:*
|
— |
22.4.0
|
|
Tigera Calico
cpe:2.3:a:tigera:calico:*:*:*:*:enterprise:*:*:*
|
3.22.0
|
3.22.3
|