Interpretation Conflict, leading to Incorrect Authorization vulnerability in Apache APISIX. With match_uri_encoded_slash enabled and skip_mtls_uri_regex
configured, a client without a certificate can reach an upstream
behind a route that requires one, limited to request paths that decode
to an exempted URI. This issue affects Apache APISIX: from 3.18.0 through 3.19.0.
Users are recommended to upgrade to version 3.20.0, which fixes the issue.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
Present
Additional conditions required
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