CVE-2022-26311
📋 TL;DR
Couchbase Operator versions 2.2.x before 2.2.3 expose sensitive information like secrets in Kubernetes logs, allowing unauthorized actors to access credentials and other confidential data. This affects organizations running Couchbase Operator in Kubernetes environments where logs are collected and potentially accessible to users with log viewing permissions.
💻 Affected Systems
- Couchbase Operator
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain access to Kubernetes secrets (database credentials, API keys, certificates) leading to complete database compromise, lateral movement within the cluster, and potential data exfiltration.
Likely Case
Unauthorized users with log access (developers, support staff, auditors) accidentally or intentionally view sensitive credentials, potentially leading to credential misuse or privilege escalation.
If Mitigated
With proper log access controls and monitoring, exposure is limited to authorized personnel only, though credential exposure still creates security risks.
🎯 Exploit Status
Exploitation requires access to Kubernetes logs (via kubectl logs, logging systems, or monitoring tools). No special tools or techniques needed beyond standard log viewing access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.2.3
Vendor Advisory: https://www.couchbase.com/alerts
Restart Required: Yes
Instructions:
1. Backup your Couchbase cluster configuration. 2. Update Couchbase Operator to version 2.2.3 or later. 3. Restart the Couchbase Operator pod. 4. Verify logs no longer contain sensitive information.
🔧 Temporary Workarounds
Restrict Log Access
allImplement Kubernetes RBAC to restrict access to pod logs and logging systems
kubectl create role pod-logs-reader --verb=get,list,watch --resource=pods/log
kubectl create rolebinding restrict-logs --role=pod-logs-reader --user=appropriate-user
Log Redirection Filter
allUse log processing tools to filter out sensitive information before storage
# Configure Fluentd or similar log forwarder with sensitive data filters
# Example Fluentd config: <filter kubernetes.**>\n @type record_transformer\n remove_keys secret,password,token\n</filter>
🧯 If You Can't Patch
- Implement strict RBAC controls to limit who can view Kubernetes logs
- Enable audit logging for log access and monitor for suspicious log viewing patterns
🔍 How to Verify
Check if Vulnerable:
Check Couchbase Operator version: kubectl get pods -n couchbase-operator-system -l app=couchbase-operator -o jsonpath='{.items[*].spec.containers[*].image}'Check Version:
kubectl get pods -n couchbase-operator-system -l app=couchbase-operator -o jsonpath='{.items[*].spec.containers[*].image}' | grep -o '2\.[0-9]*\.[0-9]*'Verify Fix Applied:
After patching, check operator logs for any remaining sensitive data: kubectl logs -n couchbase-operator-system deployment/couchbase-operator | grep -i 'secret\|password\|token'📡 Detection & Monitoring
Log Indicators:
- Log entries containing 'secret', 'password', 'token', or other credential patterns in Couchbase Operator logs
- Unauthorized users accessing Kubernetes logs
Network Indicators:
- Unusual access patterns to logging endpoints or log aggregation systems
SIEM Query:
source="kubernetes" AND ("couchbase-operator" OR "couchbase") AND ("secret" OR "password" OR "token")