CVE-2021-31921
First published: Wed Jun 02 2021(Updated: )
Istio before 1.8.6 and 1.9.x before 1.9.5 contains a remotely exploitable vulnerability where an external client can access unexpected services in the cluster, bypassing authorization checks, when a gateway is configured with AUTO_PASSTHROUGH routing configuration.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Istio Istio | <1.8.6 | |
| Istio Istio | >=1.9.0<1.9.5 |
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Frequently Asked Questions
What is the vulnerability ID for this Istio vulnerability?
The vulnerability ID for this Istio vulnerability is CVE-2021-31921.
What is the severity of CVE-2021-31921?
The severity of CVE-2021-31921 is critical.
How does CVE-2021-31921 affect Istio?
CVE-2021-31921 affects Istio versions before 1.8.6 and 1.9.x before 1.9.5 where an external client can access unexpected services in the cluster, bypassing authorization checks.
How can an attacker exploit CVE-2021-31921?
An attacker can exploit CVE-2021-31921 by leveraging an external client to access unexpected services in the cluster without proper authorization.
Are there any fixes available for CVE-2021-31921?
Yes, fixes are available for CVE-2021-31921. Upgrade to Istio version 1.8.6 or higher, or 1.9.5 or higher to mitigate the vulnerability.
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