CVE-2023-25767
📋 TL;DR
A cross-site request forgery (CSRF) vulnerability in Jenkins Azure Credentials Plugin allows attackers to trick authenticated users into connecting Jenkins to attacker-controlled web servers. This affects Jenkins instances with the Azure Credentials Plugin installed, potentially exposing Azure credentials and configuration data.
💻 Affected Systems
- Jenkins Azure Credentials Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal Azure credentials, access sensitive cloud resources, modify infrastructure, or pivot to other systems in the Azure environment.
Likely Case
Attackers could redirect Jenkins to malicious servers, intercept credentials, or manipulate Azure resource configurations.
If Mitigated
With proper CSRF protections and network segmentation, impact would be limited to credential exposure without lateral movement.
🎯 Exploit Status
Exploitation requires tricking authenticated users into visiting malicious pages.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 254.vb_71a_2c5478d3 or later
Vendor Advisory: https://www.jenkins.io/security/advisory/2023-02-15/#SECURITY-1756
Restart Required: Yes
Instructions:
1. Update Jenkins Azure Credentials Plugin to version 254.vb_71a_2c5478d3 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 for 'Prevent Cross Site Request Forgery exploits' setting
Network Segmentation
allRestrict Jenkins server outbound connections to trusted Azure endpoints only
🧯 If You Can't Patch
- Disable or remove Azure Credentials Plugin if not required
- Implement strict network controls to limit Jenkins outbound connections
🔍 How to Verify
Check if Vulnerable:
Check Jenkins plugin manager for Azure Credentials Plugin version. If version is 253.v887e0f9e898b or earlier, system is vulnerable.Check Version:
Check Jenkins web interface: Manage Jenkins > Manage Plugins > Installed tab, find 'Azure Credentials Plugin'Verify Fix Applied:
Verify Azure Credentials Plugin version is 254.vb_71a_2c5478d3 or later in Jenkins plugin manager.📡 Detection & Monitoring
Log Indicators:
- Unexpected Azure endpoint connections in Jenkins logs
- Failed authentication attempts to non-standard Azure endpoints
Network Indicators:
- Jenkins server connecting to unknown or suspicious external IPs/domains
- Unusual outbound traffic patterns from Jenkins to non-Azure endpoints
SIEM Query:
source="jenkins.log" AND ("azure" OR "credentials") AND ("connection failed" OR "unexpected endpoint")