CVE-2021-31921

EUVD-2021-18794
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 61%
Affected Products (NVD)
VendorProductVersion
istioistio
𝑥
< 1.8.6
istioistio
1.9.0 ≤
𝑥
< 1.9.5
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://istio.io/latest/news/security/istio-security-2021-006/
https://istio.io/latest/news/security/istio-security-2021-006/