Description
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12, a malicious client is able to construct credentials with permanent validity in some specific scenarios. This is caused by the some rare scenarios in which HMAC payload can be always valid in OAuth2 filter's check. Versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12 have a fix for this issue. As a workaround, avoid wildcards/prefix domain wildcards in the host's domain configuration.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
Low
Affected products
- envoyproxy / envoy>= 1.26.0, < 1.26.4 – >= 1.26.0, < 1.26.4
- envoyproxy / envoy>= 1.25.0, < 1.25.9 – >= 1.25.0, < 1.25.9
- envoyproxy / envoy>= 1.24.0, < 1.24.10 – >= 1.24.0, < 1.24.10
- envoyproxy / envoy< 1.23.12 – < 1.23.12