CVE-2022-21679

Authorization Policy bypass in Istio

Description

Istio is an open platform to connect, manage, and secure microservices. In Istio 1.12.0 and 1.12.1 The authorization policy with hosts and notHosts might be accidentally bypassed for ALLOW action or rejected unexpectedly for DENY action during the upgrade from 1.11 to 1.12.0/1.12.1. Istio 1.12 supports the hosts and notHosts fields in authorization policy with a new Envoy API shipped with the 1.12 data plane. A bug in the 1.12.0 and 1.12.1 incorrectly uses the new Envoy API with the 1.11 data plane. This will cause the hosts and notHosts fields to be always matched regardless of the actual value of the host header when mixing 1.12.0/1.12.1 control plane and 1.11 data plane. Users are advised to upgrade or to not mix the 1.12.0/1.12.1 control plane with 1.11 data plane if using hosts or notHosts field in authorization policy.

Category

6.8
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.40%
Vendor Advisory istio.io
Affected: istio istio
Published at:
Updated at:

References

Link Tags
https://github.com/istio/istio/security/advisories/GHSA-rwfr-xrvw-2rvv third party advisory
https://istio.io/latest/news/releases/1.12.x/announcing-1.12.2/ release notes vendor advisory

Frequently Asked Questions

What is the severity of CVE-2022-21679?
CVE-2022-21679 has been scored as a medium severity vulnerability.
How to fix CVE-2022-21679?
To fix CVE-2022-21679, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-21679 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-21679 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-21679?
CVE-2022-21679 affects istio istio.
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