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CVE-2021-43979

Published: Nov 17, 2021Updated: Nov 21, 2024 Sources: CVE List NVDCWE-670
5.3MEDIUM
NVD MITRE
EPSS Score
1.0%
Top 39.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

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

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-670

Affected Products

openpolicyagent
oss-project
gatekeeperLibrary
Security Products / identity-access-mgmt
and 1 more affected products View all →

Exploitability

Official Patch Available

References

https://github.com/hkerma/opa-gatekeeper-concurrency-issue
github.com
https://github.com/open-policy-agent/gatekeeper/releases
github.com

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