Vulnerability Description
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](https://istio.io/latest/docs/setup/install/multicluster/primary-remote/) 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Istio | Istio | < 1.11.7 |
Related Weaknesses (CWE)
References
- https://github.com/istio/istio/commit/5f3b5ed958ae75156f8656fe7b3794f78e94db84PatchThird Party Advisory
- https://github.com/istio/istio/security/advisories/GHSA-856q-xv3c-7f2fIssue TrackingThird Party Advisory
- https://istio.io/latest/news/security/istio-security-2022-003Third Party Advisory
- https://github.com/istio/istio/commit/5f3b5ed958ae75156f8656fe7b3794f78e94db84PatchThird Party Advisory
- https://github.com/istio/istio/security/advisories/GHSA-856q-xv3c-7f2fIssue TrackingThird Party Advisory
- https://istio.io/latest/news/security/istio-security-2022-003Third Party Advisory
FAQ
What is CVE-2022-23635?
CVE-2022-23635 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 attack...
How severe is CVE-2022-23635?
CVE-2022-23635 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-23635?
Check the references section above for vendor advisories and patch information. Affected products include: Istio Istio.