Description
Envoy is an open source edge and service proxy, designed for cloud-native applications. In affected versions a crafted request crashes Envoy when a CONNECT request is sent to JWT filter configured with regex match. This provides a denial of service attack vector. The only workaround is to not use regex in the JWT filter. Users are advised to upgrade.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected products
- envoyproxy / envoy>= 1.20.0, < 1.20.2 – >= 1.20.0, < 1.20.2
- envoyproxy / envoy>= 1.19.0, < 1.19.3 – >= 1.19.0, < 1.19.3
- envoyproxy / envoy< 1.18.6 – < 1.18.6
- envoyproxy / envoy>= 1.21.0, < 1.21.1 – >= 1.21.0, < 1.21.1