CVE-2022-25207
📋 TL;DR
This CSRF vulnerability in Jenkins Chef Sinatra Plugin allows attackers to trick authenticated Jenkins users into making unauthorized HTTP requests to attacker-controlled URLs and parsing malicious XML responses. It affects Jenkins instances with the Chef Sinatra Plugin installed, potentially leading to server-side request forgery (SSRF) and XML parsing attacks.
💻 Affected Systems
- Jenkins Chef Sinatra Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could perform SSRF attacks against internal systems, parse malicious XML to execute arbitrary code on the Jenkins server, or exfiltrate sensitive data from Jenkins and connected systems.
Likely Case
Attackers could force Jenkins to make requests to internal services, potentially accessing metadata services, internal APIs, or other Jenkins instances, leading to information disclosure or further exploitation.
If Mitigated
With proper CSRF protections and network segmentation, impact is limited to potential information disclosure from the Jenkins server itself.
🎯 Exploit Status
Exploitation requires tricking an authenticated Jenkins user into visiting a malicious webpage. No public exploit code has been released.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.21 or later
Vendor Advisory: https://www.jenkins.io/security/advisory/2022-02-15/#SECURITY-1377
Restart Required: Yes
Instructions:
1. Update Jenkins Chef Sinatra Plugin to version 1.21 or later via Jenkins Plugin Manager. 2. Restart Jenkins after plugin update. 3. Verify plugin version in Manage Jenkins > Manage Plugins > Installed tab.
🔧 Temporary Workarounds
Disable Chef Sinatra Plugin
allTemporarily disable the vulnerable plugin if immediate patching is not possible.
Navigate to Manage Jenkins > Manage Plugins > Installed tab, find 'Chef Sinatra Plugin', click 'Disable'
Implement CSRF Protection
allEnsure Jenkins CSRF protection is enabled and properly configured.
Check 'Enable security' in Configure Global Security and verify 'Prevent Cross Site Request Forgery exploits' is enabled
🧯 If You Can't Patch
- Restrict network access to Jenkins instance using firewalls or network policies
- Implement web application firewall (WAF) rules to detect and block CSRF attempts
🔍 How to Verify
Check if Vulnerable:
Check installed plugin version in Jenkins: Manage Jenkins > Manage Plugins > Installed tab, look for 'Chef Sinatra Plugin' and verify version is 1.20 or earlier.Check Version:
curl -s http://jenkins-host/pluginManager/installed | grep -A5 'Chef Sinatra Plugin'Verify Fix Applied:
Verify plugin version is 1.21 or later in Manage Jenkins > Manage Plugins > Installed tab.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests from Jenkins to external domains
- XML parsing errors in Jenkins logs
- CSRF token validation failures
Network Indicators:
- Jenkins server making unexpected outbound HTTP requests
- Requests to unusual domains or IP addresses from Jenkins
SIEM Query:
source="jenkins.log" AND ("CSRF" OR "Chef Sinatra" OR "XML parsing error")