CVE-2024-5241 – This CVE describes a critical OS command inject... (How to Fix)

📋 TL;DR

This CVE describes a critical OS command injection vulnerability in Huashi Private Cloud CDN Live Streaming Acceleration Server. Attackers can remotely execute arbitrary commands on affected systems by manipulating the 'dev' parameter in the /manager/ipconfig_new.php file. Organizations using this software up to version 20240520 are affected.

💻 Affected Systems

Products:

Huashi Private Cloud CDN Live Streaming Acceleration Server

Versions: Up to and including 20240520

Operating Systems: Unknown - Likely Linux-based given the PHP nature

Default Config Vulnerable: ⚠️ Yes

Notes: Affects the /manager/ipconfig_new.php endpoint specifically. The 'dev' parameter manipulation leads to command injection.

⚠️ Manual Verification Required

This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.

Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).

🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.

Recommended Actions:

Review the CVE details at NVD
Check vendor security advisories for your specific version
Test if the vulnerability is exploitable in your environment
Consider updating to the latest version as a precaution

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete system compromise allowing attackers to execute arbitrary commands, install malware, exfiltrate data, pivot to other systems, or establish persistent backdoors.

🟠

Likely Case

Remote code execution leading to service disruption, data theft, or deployment of ransomware/cryptominers on vulnerable servers.

🟢

If Mitigated

Limited impact if proper network segmentation, least privilege, and input validation are implemented, though the vulnerability remains exploitable.

🌐 Internet-Facing: HIGH - The vulnerability is remotely exploitable and affects internet-facing CDN acceleration servers, making them prime targets for attackers.

🏢 Internal Only: MEDIUM - While still dangerous, internal-only deployments have reduced attack surface compared to internet-facing instances.

🎯 Exploit Status

Public PoC: ⚠️ Yes

Weaponized: LIKELY

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

Exploit details have been publicly disclosed in GitHub repositories, making it easy for attackers to weaponize. The vulnerability requires no authentication.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Unknown

Vendor Advisory: None found in provided references

Restart Required: No

Instructions:

1. Contact Huashi vendor for patch availability
2. If patch exists, apply following vendor instructions
3. Test in non-production environment first
4. Monitor for vendor updates

🔧 Temporary Workarounds

Block Access to Vulnerable Endpoint

linux

Restrict access to /manager/ipconfig_new.php using web server configuration or firewall rules

# Apache: RewriteRule ^/manager/ipconfig_new\.php$ - [F,L]
# Nginx: location ~ /manager/ipconfig_new\.php$ { deny all; }
# Firewall: iptables -A INPUT -p tcp --dport 80 -m string --string "/manager/ipconfig_new.php" --algo bm -j DROP

Input Validation WAF Rule

all

Implement web application firewall rules to block suspicious 'dev' parameter values

# ModSecurity example: SecRule ARGS:dev "@rx [;&|`$()]" "id:1001,phase:2,deny,msg:'Command Injection Attempt'"
# Cloudflare/Security Group: Block requests with shell metacharacters in dev parameter

🧯 If You Can't Patch

Isolate affected servers in a dedicated network segment with strict egress filtering
Implement application-level input validation to sanitize the 'dev' parameter before processing

🔍 How to Verify

Check if Vulnerable:

Check if /manager/ipconfig_new.php exists and accepts 'dev' parameter. Test with controlled command injection payloads in non-destructive manner.

Check Version:

Check server version through admin interface or configuration files. Look for version strings containing '20240520' or earlier.

Verify Fix Applied:

Verify /manager/ipconfig_new.php endpoint is no longer accessible or properly validates input. Test with command injection payloads to confirm they're blocked.

📡 Detection & Monitoring

Log Indicators:

Unusual POST requests to /manager/ipconfig_new.php
Commands with shell metacharacters (&, ;, |, `, $) in dev parameter
Unexpected process execution from web server user

Network Indicators:

Outbound connections from web server to suspicious IPs/domains
Unusual traffic patterns from CDN server

SIEM Query:

source="web_logs" AND uri="/manager/ipconfig_new.php" AND (dev="*;*" OR dev="*&*" OR dev="*|*" OR dev="*`*" OR dev="*$(*")

📊 Metadata

CVE ID: CVE-2024-5241

CVSS v3 Score: 4.7 (MEDIUM)

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

CWE: CWE-78

Published: May 23, 2024

Last Updated: November 21, 2024

🔗 References

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