CVE-2023-32989
📋 TL;DR
This CSRF vulnerability in Jenkins Azure VM Agents Plugin allows attackers to trick authenticated users into connecting Jenkins to attacker-controlled Azure Cloud servers using stolen credentials. It affects Jenkins administrators with the plugin installed. Attackers could redirect Jenkins resources to malicious infrastructure.
💻 Affected Systems
- Jenkins Azure VM Agents Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain full control over Jenkins Azure VM infrastructure, deploy malicious agents, steal sensitive data, and incur significant cloud costs.
Likely Case
Attackers redirect Jenkins to their Azure infrastructure, potentially deploying malicious agents or stealing build artifacts.
If Mitigated
With proper CSRF protections and credential management, impact is limited to failed connection attempts.
🎯 Exploit Status
Exploitation requires social engineering to trick authenticated administrators. Credential theft needed separately.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 853.v8d35f0960a_43 or later
Vendor Advisory: https://www.jenkins.io/security/advisory/2023-05-16/#SECURITY-2855%20(2)
Restart Required: Yes
Instructions:
1. Update Jenkins Azure VM Agents Plugin to version 853.v8d35f0960a_43 or later via Jenkins Plugin Manager. 2. Restart Jenkins instance.
🔧 Temporary Workarounds
Enable CSRF Protection
allEnsure Jenkins CSRF protection is enabled globally
Check Jenkins configuration: Manage Jenkins > Configure Global Security > Enable 'Prevent Cross Site Request Forgery exploits'
Restrict Plugin Access
allLimit who can configure Azure VM Agents plugin
Manage Jenkins > Configure Global Security > Project-based Matrix Authorization Strategy > Restrict 'Configure' permissions for Azure VM Agents
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Jenkins from production Azure environments
- Monitor Azure credential usage and Jenkins-Azure connections for anomalies
🔍 How to Verify
Check if Vulnerable:
Check plugin version in Jenkins: Manage Jenkins > Manage Plugins > Installed tab > Azure VM Agents PluginCheck Version:
curl -s http://jenkins-host/pluginManager/api/json?depth=1 | grep -o '"shortName":"azure-vm-agents","version":"[^"]*"'Verify Fix Applied:
Verify plugin version is 853.v8d35f0960a_43 or later in Jenkins Plugin Manager📡 Detection & Monitoring
Log Indicators:
- Unexpected Azure cloud connections in Jenkins logs
- Failed authentication attempts to Azure from Jenkins
Network Indicators:
- Jenkins connecting to unfamiliar Azure endpoints
- Unusual outbound traffic to Azure regions
SIEM Query:
source="jenkins.log" AND ("azure" OR "cloud.azure.com") AND ("connection" OR "authentication")