CVE-2023-44080
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on PGYER CodeFever systems by sending a specially crafted request to the branchList component. It affects all deployments running vulnerable versions of PGYER CodeFever, potentially compromising the entire server.
💻 Affected Systems
- PGYER CodeFever
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attacker to execute arbitrary commands as the web server user, potentially leading to data theft, lateral movement, or ransomware deployment.
Likely Case
Remote code execution leading to web shell installation, credential harvesting, and persistence establishment on the vulnerable server.
If Mitigated
Limited impact if proper network segmentation, WAF rules, and least privilege principles are implemented, though exploitation remains possible.
🎯 Exploit Status
Public proof-of-concept code is available, making exploitation straightforward for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check PGYER CodeFever repository for latest version
Vendor Advisory: https://github.com/advisories/GHSA-cjp8-pj2w-v99h
Restart Required: Yes
Instructions:
1. Update to the latest version of PGYER CodeFever. 2. Restart the CodeFever service. 3. Verify the update was successful.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict access to the CodeFever instance to trusted IP addresses only
# Use firewall rules to restrict access
iptables -A INPUT -p tcp --dport [CODEFEVER_PORT] -s [TRUSTED_IP] -j ACCEPT
iptables -A INPUT -p tcp --dport [CODEFEVER_PORT] -j DROP
WAF Rule Implementation
allImplement web application firewall rules to block malicious requests to branchList endpoint
# Example ModSecurity rule
SecRule REQUEST_URI "@rx /branchList" "id:1001,phase:2,deny,msg:'CVE-2023-44080 Block'"
🧯 If You Can't Patch
- Isolate the CodeFever instance from other critical systems using network segmentation
- Implement strict monitoring and alerting for suspicious activity on the CodeFever server
🔍 How to Verify
Check if Vulnerable:
Check if your CodeFever version matches the vulnerable version string or earlierCheck Version:
Check CodeFever web interface or configuration files for version informationVerify Fix Applied:
Verify the version has been updated beyond v.2023.8.14-2ce4006 and test that branchList endpoint no longer accepts malicious input📡 Detection & Monitoring
Log Indicators:
- Unusual requests to /branchList endpoint
- Suspicious command execution patterns in web server logs
- Unexpected process creation from web server user
Network Indicators:
- Malformed HTTP requests targeting branchList component
- Outbound connections from web server to suspicious IPs
SIEM Query:
source="web_logs" AND uri="/branchList" AND (status=500 OR method="POST" AND size>1000)