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Vulnerability Details : 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.
Publish Date : 2021-11-17 Last Update Date : 2021-11-22
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- CVSS Scores & Vulnerability Types

CVSS Score
5.0
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact None (There is no impact to the availability of the system.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Bypass a restriction or similar
CWE ID 755

- Products Affected By CVE-2021-43979

# Product Type Vendor Product Version Update Edition Language
1 Application Openpolicyagent Gatekeeper * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Openpolicyagent Gatekeeper 1

- References For CVE-2021-43979

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

- Metasploit Modules Related To CVE-2021-43979

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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