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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
WSO2 WSO2 API Manager
Default version status: unaffected
0 to < 4.1.0unknown4.1.0 to < 4.1.0.253affected4.2.0 to < 4.2.0.193affected4.3.0 to < 4.3.0.104affected4.4.0 to < 4.4.0.68affected4.5.0 to < 4.5.0.52affected
WSO2 WSO2 API Control Plane
Default version status: unaffected
4.5.0 to < 4.5.0.53affected