CVE-2025-68702
📋 TL;DR
Jervis versions before 2.2 incorrectly use 32-character padding instead of 64-character padding for SHA-256 hashes, which could lead to hash collisions and security bypasses. This affects Jenkins pipeline implementations using vulnerable Jervis library versions. The vulnerability allows attackers to potentially bypass security checks that rely on proper hash generation.
💻 Affected Systems
- Jervis
📦 What is this software?
Jervis by Samrocketman
⚠️ Risk & Real-World Impact
Worst Case
Attackers could generate malicious payloads that produce identical truncated hashes to legitimate content, bypassing security controls and potentially executing unauthorized code in Jenkins pipelines.
Likely Case
Hash collisions could allow bypassing security checks in Jenkins job validation or pipeline execution, potentially leading to unauthorized job execution or privilege escalation.
If Mitigated
With proper network segmentation and access controls, impact would be limited to specific Jenkins pipeline environments rather than broader infrastructure.
🎯 Exploit Status
Exploitation requires understanding of specific Jenkins pipeline implementations and how they use Jervis-generated hashes. No public exploits have been documented.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.2
Vendor Advisory: https://github.com/samrocketman/jervis/security/advisories/GHSA-67rj-pjg6-pq59
Restart Required: Yes
Instructions:
1. Update Jervis dependency to version 2.2 or later in your Jenkins pipeline configuration. 2. Update any shared pipeline libraries using Jervis. 3. Restart Jenkins to apply changes. 4. Test pipeline functionality after update.
🔧 Temporary Workarounds
Manual hash validation override
allImplement custom hash validation logic that uses proper 64-character padding for SHA-256 comparisons
Implement custom Groovy function: def validateHash(input) { return input.padLeft(64, '0') }
🧯 If You Can't Patch
- Implement additional security controls around Jenkins pipeline execution
- Monitor for unusual pipeline job executions and hash validation failures
🔍 How to Verify
Check if Vulnerable:
Check Jenkins pipeline configuration for Jervis dependency version. If using shared libraries, inspect library configuration files.Check Version:
Check Jenkins plugin manager or pipeline configuration files for 'jervis' version specificationVerify Fix Applied:
Verify Jervis version is 2.2 or higher in Jenkins plugin manager and pipeline configurations. Test SHA-256 hash generation produces 64-character outputs.📡 Detection & Monitoring
Log Indicators:
- Failed hash validations in Jenkins logs
- Unusual pipeline job executions
- Errors related to Jervis library operations
Network Indicators:
- Unusual Jenkins API calls related to pipeline execution
SIEM Query:
source="jenkins.log" AND ("jervis" OR "hash validation" OR "pipeline security")