Global infos:

Envoy is a cloud-native high-performance proxy. In versions prior to 1.22.1 the OAuth filter implementation does not include a mechanism for validating access tokens, so by design when the HMAC signed cookie is missing a full authentication flow should be triggered. However, the current implementation assumes that access tokens are always validated thus allowing access in the presence of any access token attached to the request. Users are advised to upgrade. There is no known workaround for this issue.

CVE Status: Modified

References:

[email protected]

[email protected]

af854a3a-2127-422b-91ae-364da2661108

af854a3a-2127-422b-91ae-364da2661108

Metrics:

Attribute	Value
Attack Complexity	LOW
Attack Vector	NETWORK
Availability Impact	NONE
Base Score	10
Base Severity	CRITICAL
Confidentiality Impact	HIGH
Integrity Impact	HIGH
Privileges Required	NONE
Scope	CHANGED
User Interaction	NONE
Vector String	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Exploitability Score	3.9
Impact Score	5.8
Source	[email protected]
Type	Secondary

Links:

Exploit-db
Github