CVE Vulnerabilities

CVE-2022-23635

Improper Authentication

Published: Feb 22, 2022 | Modified: Mar 01, 2022
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
5 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P
RedHat/V2
RedHat/V3
7.5 MODERATE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Ubuntu

Istio is an open platform to connect, manage, and secure microservices. In affected versions the Istio control plane, istiod, is vulnerable to a request processing error, allowing a malicious attacker that sends a specially crafted message which results in the control plane crashing. This endpoint is served over TLS port 15012, but does not require any authentication from the attacker. For simple installations, Istiod is typically only reachable from within the cluster, limiting the blast radius. However, for some deployments, especially multicluster topologies, this port is exposed over the public internet. There are no effective workarounds, beyond upgrading. Limiting network access to Istiod to the minimal set of clients can help lessen the scope of the vulnerability to some extent.

Weakness

When an actor claims to have a given identity, the software does not prove or insufficiently proves that the claim is correct.

Affected Software

Name Vendor Start Version End Version
Istio Istio * *
Istio Istio 1.12.0 *
Istio Istio 1.13.0 *
OpenShift Service Mesh 2.0 RedHat servicemesh-0:2.0.9-3.el8 *
OpenShift Service Mesh 2.1 RedHat servicemesh-0:2.1.2-4.el8 *

Potential Mitigations

References