Improper Authorization in OVN Kubernetes - CVE-2021-3499
Published: June 25, 2021
Vulnerability identifier: #VU54393
CSH Severity: Medium
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-3499
CWE-ID: CWE-285
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain access to restricted resources.
The vulnerability exists in OVN Kubernetes where the Egress Firewall does not reliably apply firewall rules when there is multiple DNS rules. A remote attacker can gain unauthorized access to the protected system.
Affected software
OVN Kubernetes
Red Hat OpenShift Container Platform
Red Hat OpenShift Container Platform
How to mitigate CVE-2021-3499
Install updates from vendor's website.
OVN Kubernetes - update to 0.3.11
Red Hat OpenShift Container Platform - update to 4.7.11
Red Hat OpenShift Container Platform - update to 4.7.11