CVE-2023-2583
📋 TL;DR
CVE-2023-2583 is a critical code injection vulnerability in jsreport, a JavaScript-based reporting tool. It allows attackers to execute arbitrary code on affected servers by injecting malicious input. All users running jsreport versions prior to 3.11.3 are affected.
💻 Affected Systems
- jsreport
📦 What is this software?
Jsreport by Jsreport
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise leading to data theft, ransomware deployment, lateral movement within the network, and persistent backdoor installation.
Likely Case
Remote code execution allowing attackers to steal sensitive data, manipulate reports, or use the server as a foothold for further attacks.
If Mitigated
Limited impact with proper input validation, sandboxing, and network segmentation preventing lateral movement.
🎯 Exploit Status
Exploit details are publicly available in the linked references. The CVSS 10.0 score indicates trivial exploitation with maximum impact.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.11.3
Vendor Advisory: https://github.com/jsreport/jsreport/commit/afaff3804b34b38e959f5ae65f9e672088de13d7
Restart Required: Yes
Instructions:
1. Update jsreport to version 3.11.3 or later using npm: npm update jsreport. 2. Restart the jsreport service. 3. Verify the update was successful.
🔧 Temporary Workarounds
Input Validation Filter
allImplement strict input validation to reject suspicious patterns in report templates and data.
Network Isolation
allPlace jsreport servers in isolated network segments with strict firewall rules limiting inbound/outbound connections.
🧯 If You Can't Patch
- Immediately isolate affected systems from the internet and critical internal networks.
- Implement application-level firewalls (WAF) with rules to block code injection patterns.
🔍 How to Verify
Check if Vulnerable:
Check the jsreport version in package.json or via npm list jsreport. If version is below 3.11.3, the system is vulnerable.Check Version:
npm list jsreport | grep jsreportVerify Fix Applied:
Confirm the version is 3.11.3 or higher using npm list jsreport and test report generation with safe inputs.📡 Detection & Monitoring
Log Indicators:
- Unusual process execution from jsreport context
- Errors containing suspicious code patterns in report requests
- Unexpected network connections from jsreport server
Network Indicators:
- Outbound connections to unusual IPs/ports from jsreport server
- Large data exfiltration from jsreport host
SIEM Query:
source="jsreport" AND (process_execution OR error_message="*eval*" OR error_message="*require*" OR error_message="*Function*")