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 when the validating webhook for a cluster is exposed publicly. This endpoint is served over TLS port 15017, 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 [external istiod](https://istio.io/latest/docs/setup/install/external-controlplane/) topologies, this port is exposed over the public internet. This issue has been patched in versions 1.13.2, 1.12.5 and 1.11.8. Users are advised to upgrade. Users unable to upgrade should disable access to a validating webhook that is exposed to the public internet or restrict the set of IP addresses that can query it to a set of known, trusted entities.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2022-03-10T20:45:12

Updated: 2024-08-03T04:20:49.823Z

Reserved: 2022-02-10T00:00:00

Link: CVE-2022-24726

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2022-03-10T21:15:14.603

Modified: 2022-03-18T20:20:42.910

Link: CVE-2022-24726

cve-icon Redhat

Severity : Important

Publid Date: 2022-03-09T20:00:00Z

Links: CVE-2022-24726 - Bugzilla