CVE-2025-31728
📋 TL;DR
The Jenkins AsakusaSatellite Plugin 0.1.1 and earlier displays API keys in plaintext on job configuration forms instead of masking them. This allows attackers with access to Jenkins configuration interfaces to capture these credentials, potentially compromising connected AsakusaSatellite services. Organizations using vulnerable plugin versions are affected.
💻 Affected Systems
- Jenkins AsakusaSatellite Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers capture API keys and gain unauthorized access to AsakusaSatellite services, potentially modifying or deleting data, disrupting operations, or using the keys for lateral movement.
Likely Case
Internal users or attackers with Jenkins access view and misuse API keys for unauthorized AsakusaSatellite operations, leading to data exposure or service disruption.
If Mitigated
With proper access controls limiting Jenkins configuration access, the exposure remains minimal as only authorized administrators can view the keys.
🎯 Exploit Status
Exploitation requires access to Jenkins job configuration pages where API keys are displayed in plaintext.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.1.2 or later
Vendor Advisory: https://www.jenkins.io/security/advisory/2025-04-02/#SECURITY-3523
Restart Required: Yes
Instructions:
1. Update Jenkins AsakusaSatellite Plugin to version 0.1.2 or later via Jenkins Plugin Manager. 2. Restart Jenkins to apply the update. 3. Verify the plugin version in Manage Jenkins > Manage Plugins.
🔧 Temporary Workarounds
Restrict Jenkins Configuration Access
allLimit access to Jenkins job configuration pages to only trusted administrators using Jenkins' built-in role-based access control.
Rotate AsakusaSatellite API Keys
allGenerate new API keys in AsakusaSatellite and update Jenkins job configurations with the new masked keys after patching.
🧯 If You Can't Patch
- Restrict access to Jenkins configuration interfaces to minimal trusted personnel only.
- Monitor Jenkins access logs for unauthorized configuration page views and rotate API keys regularly.
🔍 How to Verify
Check if Vulnerable:
Check plugin version in Jenkins: Manage Jenkins > Manage Plugins > Installed tab, search for 'AsakusaSatellite'. If version is 0.1.1 or earlier, it's vulnerable.Check Version:
On Jenkins web interface: Manage Jenkins > Manage Plugins > Installed tab, find AsakusaSatellite Plugin version.Verify Fix Applied:
After updating, verify the plugin version is 0.1.2 or later in Manage Plugins. Check that API keys in job configuration forms are masked (displayed as dots or asterisks).📡 Detection & Monitoring
Log Indicators:
- Unusual access to Jenkins job configuration pages from unauthorized users or IPs in Jenkins access logs.
Network Indicators:
- Unexpected API calls to AsakusaSatellite services using Jenkins-stored keys from unusual sources.
SIEM Query:
source="jenkins_access.log" AND (uri="/job/*/configure" OR uri="/view/*/job/*/configure") AND user!="admin_user"