CVE-2022-23107
📋 TL;DR
The Jenkins Warnings Next Generation Plugin vulnerability allows attackers with Item/Configure permission to read and write files with specific hard-coded suffixes on the Jenkins controller file system. This occurs because the plugin fails to properly restrict file names when configuring custom IDs. Organizations using Jenkins with this plugin are affected.
💻 Affected Systems
- Jenkins Warnings Next Generation Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could write malicious files to the Jenkins controller, potentially leading to remote code execution, data theft, or complete system compromise.
Likely Case
Attackers with Item/Configure permission can read sensitive files or write files to specific locations, potentially enabling privilege escalation or data exfiltration.
If Mitigated
With proper access controls limiting Item/Configure permissions, impact is reduced to authorized users only.
🎯 Exploit Status
Exploitation requires Item/Configure permission. Public details and proof-of-concept are available in security advisories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 9.11.0 and later
Vendor Advisory: https://www.jenkins.io/security/advisory/2022-01-12/#SECURITY-2090
Restart Required: Yes
Instructions:
1. Update Jenkins Warnings Next Generation Plugin to version 9.11.0 or later via Jenkins Plugin Manager. 2. Restart Jenkins to apply the update.
🔧 Temporary Workarounds
Restrict Item/Configure Permissions
allLimit Item/Configure permissions to trusted users only to reduce attack surface.
Disable Plugin
allTemporarily disable the Warnings Next Generation Plugin if not essential.
Navigate to Manage Jenkins > Manage Plugins > Installed tab, find 'Warnings Next Generation Plugin' and disable
🧯 If You Can't Patch
- Implement strict access controls to limit Item/Configure permissions to minimal necessary users.
- Monitor file system access and Jenkins logs for suspicious file read/write activities.
🔍 How to Verify
Check if Vulnerable:
Check Jenkins plugin manager for Warnings Next Generation Plugin version. If version is 9.10.2 or earlier, system is vulnerable.Check Version:
Navigate to Manage Jenkins > Manage Plugins > Installed tab and check 'Warnings Next Generation Plugin' version.Verify Fix Applied:
Verify plugin version is 9.11.0 or later in Jenkins Plugin Manager.📡 Detection & Monitoring
Log Indicators:
- Unusual file read/write operations in Jenkins logs
- Suspicious configuration changes to Warnings Next Generation Plugin
Network Indicators:
- Unusual Jenkins API calls related to plugin configuration
SIEM Query:
source="jenkins.log" AND ("Warnings Next Generation" OR "SECURITY-2090")