Description
Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.34.0 until 1.35.13, 1.36.9, 1.37.5, and 1.38.3, PROXY Protocol v2 header generator emits TLVs beyond the maximum length of 65535 bytes, causing a mismatch between bytes written and the length field in the header. This can result in smuggled bytes on the upstream request. This vulnerability is fixed in 1.35.13, 1.36.9, 1.37.5, and 1.38.3.
CVSS breakdown
CVSS 3.1
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
Low
Availability
Low
Affected products
- envoyproxy / envoy>= 1.38.0, < 1.38.3 – >= 1.38.0, < 1.38.3
- envoyproxy / envoy>= 1.37.0, < 1.37.5 – >= 1.37.0, < 1.37.5
- envoyproxy / envoy>= 1.36.0, < 1.36.9 – >= 1.36.0, < 1.36.9
- envoyproxy / envoy>= 1.34.0, < 1.35.13 – >= 1.34.0, < 1.35.13