CVE-2019-10417
📋 TL;DR
This vulnerability in Jenkins Kubernetes Pipeline Steps Plugin allows attackers to bypass script security sandbox protections and execute arbitrary methods. Attackers with permission to configure pipelines can achieve remote code execution. Affects Jenkins installations using the vulnerable plugin.
💻 Affected Systems
- Jenkins Kubernetes Pipeline Steps Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise through remote code execution, allowing attackers to execute arbitrary commands on Jenkins nodes and potentially pivot to other systems.
Likely Case
Attackers with pipeline configuration access can execute arbitrary code, steal credentials, modify pipelines, and disrupt CI/CD operations.
If Mitigated
With proper access controls and network segmentation, impact limited to isolated Jenkins nodes without critical data access.
🎯 Exploit Status
Exploitation requires authenticated access with pipeline configuration permissions. Public exploit details available in security advisories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.8.2
Vendor Advisory: https://jenkins.io/security/advisory/2019-09-25/#SECURITY-920%20%281%29
Restart Required: Yes
Instructions:
1. Update Jenkins Kubernetes Pipeline Steps Plugin to version 1.8.2 or later via Jenkins Plugin Manager. 2. Restart Jenkins service. 3. Verify plugin version in installed plugins list.
🔧 Temporary Workarounds
Disable vulnerable plugin
allTemporarily disable the Kubernetes Pipeline Steps Plugin if immediate patching is not possible
Navigate to Jenkins > Manage Jenkins > Manage Plugins > Installed tab
Find 'Kubernetes Pipeline Steps' plugin
Click 'Disable' button
Restrict pipeline configuration permissions
allLimit who can configure pipelines to reduce attack surface
Navigate to Jenkins > Manage Jenkins > Configure Global Security
Configure Matrix-based security or Role-based strategy
Remove 'Job/Configure' permission from non-admin users
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Jenkins from critical systems
- Enforce least privilege access controls for Jenkins users and service accounts
🔍 How to Verify
Check if Vulnerable:
Check installed plugin version: Jenkins > Manage Jenkins > Manage Plugins > Installed tab, look for 'Kubernetes Pipeline Steps' versionCheck Version:
curl -s http://jenkins-url/pluginManager/api/json?depth=1 | grep -o '"shortName":"kubernetes-pipeline-steps","version":"[^"]*"'Verify Fix Applied:
Verify plugin version is 1.8.2 or higher in installed plugins list📡 Detection & Monitoring
Log Indicators:
- Unusual pipeline configuration changes
- Script security sandbox violation warnings
- Unexpected process execution from Jenkins nodes
Network Indicators:
- Unusual outbound connections from Jenkins nodes
- Suspicious payloads in pipeline configuration requests
SIEM Query:
source="jenkins.log" AND ("script security" OR "sandbox" OR "kubernetes-pipeline-steps") AND ("violation" OR "bypass" OR "unauthorized")