CVE-2022-3262 in OpenShift
Summary
by MITRE • 12/08/2022
A flaw was found in Openshift. A pod with a DNSPolicy of "ClusterFirst" may incorrectly resolve the hostname based on a service provided. This flaw allows an attacker to supply an incorrect name with the DNS search policy, affecting confidentiality and availability.
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Analysis
by VulDB Data Team • 04/24/2025
The vulnerability identified as CVE-2022-3262 resides within the OpenShift container platform and represents a critical DNS resolution flaw affecting pod networking configurations. This issue specifically impacts pods that utilize the DNSPolicy setting of "ClusterFirst" which is the default configuration for most OpenShift deployments. The flaw manifests when the DNS search policy incorrectly resolves hostnames through service providers rather than following proper cluster DNS resolution procedures. This misconfiguration creates a pathway for malicious actors to manipulate DNS responses and potentially redirect traffic intended for legitimate services.
The technical implementation of this vulnerability stems from how OpenShift handles DNS resolution when pods are configured with ClusterFirst policy. Under normal circumstances, pods should resolve hostnames through the cluster's internal DNS server which maintains proper mappings of service names to their corresponding endpoints. However, the flaw allows attackers to exploit the DNS search domain resolution process, enabling them to inject incorrect DNS records that can override legitimate service lookups. This behavior violates the fundamental principles of DNS security and can be categorized under CWE-1347 which addresses improper DNS resolution and the potential for DNS spoofing attacks.
The operational impact of CVE-2022-3262 extends beyond simple network disruption to encompass significant confidentiality and availability risks. An attacker exploiting this vulnerability can manipulate DNS responses to redirect traffic to malicious endpoints, potentially intercepting sensitive communications or causing service outages. The flaw particularly affects applications that rely heavily on internal service discovery mechanisms, where the compromise of DNS resolution can cascade into broader system failures. This vulnerability directly aligns with ATT&CK technique T1071.004 which covers application layer protocol: DNS, and can be leveraged for lateral movement within the cluster through DNS tunneling or DNS cache poisoning attacks.
Organizations utilizing OpenShift platforms must implement immediate mitigations to address this vulnerability. The primary recommendation involves either updating to patched versions of OpenShift that contain the necessary DNS resolution fixes or implementing network segmentation controls to limit the scope of potential DNS attacks. Administrators should also consider implementing DNS monitoring solutions that can detect anomalous DNS resolution patterns and alert on suspicious hostname resolution behaviors. Additionally, the use of DNS policies such as "None" or "Default" with explicit DNS configuration can help reduce the attack surface, though these approaches may require application-level adjustments to maintain proper service discovery. The vulnerability demonstrates the critical importance of DNS security within containerized environments and reinforces the need for comprehensive network security monitoring in cloud-native deployments.