Description
The API Publisher component previously used a non-cryptographic pseudorandom number generator (PRNG) to create shared secrets for Webhook HMAC validation. This PRNG lacks sufficient entropy for security-sensitive operations, allowing a sophisticated attacker to predict future secrets. This enables malicious actors to forge event payloads with valid HMAC signatures, bypassing the API Gateway's authenticity verification. Successful exploitation could allow an attacker to predict shared secrets used for Webhook HMAC validation and forge event payloads with valid signatures. This may enable bypassing API Gateway authenticity checks, leading to unauthorized event injection, data manipulation, or downstream system compromise.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected products
- WSO2 / api_control_plane4.5.0 – 4.5.0.53
- WSO2 / api_manager4.1.0 – 4.1.0.253
- WSO2 / WSO2 API Control Plane4.5.0 – 4.5.0.53
- WSO2 / WSO2 API Manager4.3.0 – 4.3.0.104
- WSO2 / WSO2 API Manager0 – 4.1.0
- WSO2 / WSO2 API Manager4.5.0 – 4.5.0.52
- WSO2 / WSO2 API Manager4.4.0 – 4.4.0.68
- WSO2 / WSO2 API Manager4.1.0 – 4.1.0.253
- WSO2 / WSO2 API Manager4.2.0 – 4.2.0.193
Updated 44m ago · 8 sources