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CrushFTP, a widely used file transfer software, has disclosed a critical vulnerability (CVE-2025-2825) that allows unauthenticated attackers to access servers via HTTP(S). Administrators must apply patches immediately to prevent exploitation. Over 3,400 exposed instances of CrushFTP are currently vulnerable, making this a high-priority threat.
Affected Versions & Patches
- Vulnerable Versions: All versions below 10.8.4 and 11.3.1
- Patched Versions: Upgrade to CrushFTP 10.8.4+ or 11.3.1+
You Should Know: Detection & Mitigation Steps
1. Check if Your Server is Exposed
Run the following Nmap command to scan for exposed CrushFTP instances:
nmap -p 80,443,2222 --script http-vuln-cve2025-2825 <target_IP_or_range>
#### **2. Immediate Mitigation**
- Linux/macOS (Manual Patch):
wget https://www.crushftp.com/downloads/CrushFTP10_8_4.zip unzip CrushFTP10_8_4.zip sudo ./CrushFTP.sh update
- Windows (PowerShell Update):
Invoke-WebRequest -Uri "https://www.crushftp.com/downloads/CrushFTP11_3_1.exe" -OutFile "CrushFTP_Update.exe" Start-Process -FilePath "CrushFTP_Update.exe" -ArgumentList "/silent" -Wait
#### **3. Firewall Rules for Temporary Protection**
Block unauthorized access with iptables (Linux) or Windows Firewall:
<h1>Linux (Block external HTTP/S access except for admins)</h1> sudo iptables -A INPUT -p tcp --dport 80 -s ! <admin_IP> -j DROP sudo iptables -A INPUT -p tcp --dport 443 -s ! <admin_IP> -j DROP
<h1>Windows (Restrict CrushFTP ports)</h1> New-NetFirewallRule -DisplayName "Block_CrushFTP_Exploit" -Direction Inbound -Protocol TCP -LocalPort 80,443,2222 -Action Block
#### **4. Log Monitoring for Exploitation Attempts**
Check **CrushFTP logs** for suspicious activity:
grep -i "unauthorized|access denied" /var/log/crushftp.log
### **What Undercode Say**
This vulnerability mirrors the MOVEit breach, where attackers exploited unpatched servers for ransomware and data theft. Immediate action is critical. Key takeaways:
– Patch first, investigate later – Delay increases breach risk.
– Assume breach – Check logs for prior intrusions.
– Zero Trust helps – Restrict server access to known IPs.
**Additional Security Commands:**
- Linux:
</li> </ul> <h1>Check running CrushFTP processes</h1> ps aux | grep CrushFTP <h1>Verify open ports</h1> ss -tulnp | grep '80|443|2222'
– Windows:
<h1>List active services</h1> Get-Service | Where-Object {$_.DisplayName -like "*CrushFTP*"} <h1>Check network connections</h1> netstat -ano | findstr ":80 :443 :2222"**Reference:**
### **Expected Output:**
A secured CrushFTP instance with restricted access, updated software, and active monitoring.
References:
Reported By: Cherif Diallo – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅Join Our Cyber World:
