Calico's Application Layer Policy (disabled by default), which enforces HTTP rules through Dikastes, fails to perform URL path normalization. As a result, HTTP requests using path-traversal segments, encoded slashes, or repeated slashes are not correctly evaluated by Prefix path rules. Dikastes authorizes the request under the permitted prefix while the downstream workload or a fronting proxy normalizes the path and serves the restricted endpoint.
An attacker with network access and no special RBAC can potentially reach HTTP endpoints the policy was intended to restrict.
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
None
No data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 5
| 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:*:*:*
|
— |
3.31.6
|
|
Tigera Calico
cpe:2.3:a:tigera:calico:*:*:*:*:cloud:*:*:*
|
— |
<= 22.4.0
|
|
Tigera Calico
cpe:2.3:a:tigera:calico:*:*:*:*:enterprise:*:*:*
|
3.22.0
|
3.22.4
|
|
Tigera Calico
cpe:2.3:a:tigera:calico:*:*:*:*:open_source:*:*:*
|
3.32.0
|
3.32.1
|