Global infos:

The AWS ALB Route Directive Adapter For Istio repo https://github.com/awslabs/aws-alb-route-directive-adapter-for-istio/tree/master provides an OIDC authentication mechanism that was integrated into the open source Kubeflow project. The adapter uses JWT for authentication, but lacks proper signer and issuer validation. In deployments of ALB that ignore security best practices, where ALB targets are directly exposed to internet traffic, an actor can provide a JWT signed by an untrusted entity in order to spoof OIDC-federated sessions and successfully bypass authentication. The repository/package has been deprecated, is end of life, and is no longer supported. As a security best practice, ensure that your ELB targets (e.g. EC2 Instances, Fargate Tasks etc.) do not have public IP addresses. Ensure any forked or derivative code validate that the signer attribute in the JWT match the ARN of the Application Load Balancer that the service is configured to use.

CVE Status: Awaiting Analysis

References:

ff89ba41-3aa1-4d27-914a-91399e9639e5

ff89ba41-3aa1-4d27-914a-91399e9639e5

Metrics:

Attribute	Value
Attack Complexity	HIGH
Attack Vector	NETWORK
Availability Impact	NONE
Base Score	7.5
Base Severity	HIGH
Confidentiality Impact	HIGH
Integrity Impact	LOW
Privileges Required	NONE
Scope	CHANGED
User Interaction	NONE
Vector String	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N
Exploitability Score	2.2
Impact Score	4.7
Source	ff89ba41-3aa1-4d27-914a-91399e9639e5
Type	Secondary

Links:

Exploit-db
Github