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Link: WSO2 OAuth Plugin Vulnerability
This vulnerability allows unauthenticated attackers to log in to Jenkins controllers using any username and password—even non-existent ones—when the WSO2 OAuth Plugin is configured as the security realm.
You Should Know:
1. Vulnerability Verification
To check if your Jenkins instance is vulnerable:
curl -X GET "http://<JENKINS_URL>/securityRealm/metadata"
If it returns WSO2 metadata without authentication, the system is likely vulnerable.
2. Exploitation Steps
Attackers can bypass authentication by manipulating OAuth tokens:
curl -X POST "http://<JENKINS_URL>/securityRealm/oauth/token" -d "username=anyuser&password=anypass"
3. Mitigation Steps
- Immediate Workaround: Disable the WSO2 OAuth Plugin.
jenkins-cli -s http://<JENKINS_URL>/ disable-plugin wso2-oauth
- Permanent Fix: Update Jenkins and the plugin to the latest version.
jenkins-cli -s http://<JENKINS_URL>/ install-plugin wso2-oauth -deploy
4. Log Analysis for Compromise
Check Jenkins logs for suspicious login attempts:
grep "Failed login" /var/log/jenkins/jenkins.log
5. Network-Level Protection
Restrict Jenkins access via firewall:
iptables -A INPUT -p tcp --dport 8080 -s TRUSTED_IP -j ACCEPT iptables -A INPUT -p tcp --dport 8080 -j DROP
What Undercode Say:
This vulnerability highlights the risks of misconfigured OAuth integrations. Attackers can exploit weak token validation mechanisms to gain unauthorized access. System administrators must:
– Monitor authentication logs for anomalies.
– Apply patches promptly for OAuth-related plugins.
– Enforce network segmentation to limit exposure.
Expected Output:
[+] Jenkins WSO2 OAuth Plugin Bypass Detected [+] Apply CVE-2023-XXXX Patch Immediately
Prediction:
Similar OAuth misconfigurations will likely be discovered in other CI/CD platforms, requiring stricter default security policies.
Relevant Links:
References:
Reported By: Souhaib Naceri – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
