Remote Access Vulnerability in Istio Gateway Configuration by Istio
CVE-2021-31921

9.8CRITICAL

Key Information:

Vendor

Istio

Status
Istio
Vendor
CVE Published:
2 June 2021

What is CVE-2021-31921?

A vulnerability exists in Istio, affecting versions prior to 1.8.6 and 1.9.x before 1.9.5, which allows external clients to gain unauthorized access to unexpected services within the cluster. This occurs when the gateway is set to AUTO_PASSTHROUGH routing configuration, effectively bypassing essential authorization checks and potentially compromising the security and operational integrity of the affected services.

References

https://istio.io/latest/news/security/istio-security-2021...
x_refsource_MISC

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.