CVE-2022-36889
📋 TL;DR
This vulnerability in Jenkins Deployer Framework Plugin allows attackers with Item/Configure permission to upload arbitrary files from the Jenkins controller file system to deployment services. It enables file system access and potential remote code execution. Users of Jenkins with the vulnerable plugin are affected.
💻 Affected Systems
- Jenkins Deployer Framework Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers achieve remote code execution on Jenkins controller, potentially compromising the entire CI/CD pipeline and sensitive data.
Likely Case
Attackers exfiltrate sensitive files from Jenkins controller or deploy malicious artifacts to production services.
If Mitigated
Limited to authorized users with Item/Configure permission, reducing exposure scope.
🎯 Exploit Status
Exploitation requires Item/Configure permission but is straightforward once authenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 86.v1d1888e8c021 or later
Vendor Advisory: https://www.jenkins.io/security/advisory/2022-07-27/#SECURITY-2764
Restart Required: Yes
Instructions:
1. Update Jenkins Deployer Framework Plugin to version 86.v1d1888e8c021 or later via Jenkins Plugin Manager. 2. Restart Jenkins to apply the update.
🔧 Temporary Workarounds
Remove Item/Configure permission
allRestrict Item/Configure permission to trusted users only to limit attack surface.
Uninstall vulnerable plugin
allRemove the Deployer Framework Plugin if not required for operations.
🧯 If You Can't Patch
- Implement strict access controls to limit users with Item/Configure permission.
- Monitor file upload activities and Jenkins controller file system for unauthorized changes.
🔍 How to Verify
Check if Vulnerable:
Check Jenkins plugin manager for Deployer Framework Plugin version. If version is 85.v1d1888e8c021 or earlier, system is vulnerable.Check Version:
Check via Jenkins web UI: Manage Jenkins > Plugin Manager > Installed plugins, or check $JENKINS_HOME/plugins/deployer-framework/META-INF/MANIFEST.MFVerify Fix Applied:
Verify plugin version is 86.v1d1888e8c021 or later in Jenkins plugin manager.📡 Detection & Monitoring
Log Indicators:
- Unusual file upload activities in Jenkins logs
- Deployment configuration changes by unauthorized users
Network Indicators:
- Unexpected file transfers from Jenkins controller to deployment targets
SIEM Query:
source="jenkins.log" AND ("deployer-framework" OR "file upload") AND (status="FAILURE" OR user NOT IN ["trusted_users"])