CVE Vulnerability

CVE-2021-43979

** DISPUTED ** Styra Open Policy Agent (OPA) Gatekeeper through 3.7.0 mishandles concurrency, sometimes resulting in incorrect access control. The data replication mechanism allows policies to access the Kubernetes cluster state. During data replication, OPA/Gatekeeper does not wait for the replication to finish before processing a request, which might cause inconsistencies between the replicated resources in OPA/Gatekeeper and the resources actually present in the cluster. Inconsistency can later be reflected in a policy bypass. NOTE: the vendor disagrees that this is a vulnerability, because Kubernetes states are only eventually consistent.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

Scope

5.3 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://github.com/hkerma/opa-gatekeeper-concurrency-issue Third Party Advisory
https://github.com/open-policy-agent/gatekeeper/releases Patch Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:openpolicyagent:gatekeeper:*:*:*:*:*:*:*:*
Information

Published : 2021-11-17 07:15

Updated : 2022-07-12 05:42

NVD link : CVE-2021-43979

Mitre link : CVE-2021-43979

Products Affected
No products.
CWE
CWE-670