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How the CVE Works
CVE-2025-3374 exploits a buffer overflow vulnerability in PCMan FTP Server 2.0.7 via the CCC command handler. Attackers send an overly long payload to the command handler, corrupting memory and allowing arbitrary code execution. The flaw exists due to insufficient bounds checking when processing input. Since the FTP server runs with elevated privileges, successful exploitation grants full system control. The attack is remotely exploitable without authentication, making it critical.
DailyCVE Form
Platform: PCMan FTP
Version: 2.0.7
Vulnerability: Buffer Overflow
Severity: Critical
Date: 04/23/2025
What Undercode Say:
Exploitation:
1. Crafted payload triggers overflow:
import socket
payload = "CCC " + "A" 1000
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(("target_ip", 21))
s.send(payload.encode())
2. EIP overwrite leads to RCE.
Protection:
1. Patch or upgrade FTP server.
2. Deploy stack canaries:
gcc -fstack-protector-all -o ftp_server ftp_server.c
3. Network segmentation.
4. Disable unused FTP commands.
Detection:
grep -r "CCC" /etc/ftp/conf
Mitigation:
1. Apply vendor patch.
2. Restrict FTP access via firewall:
iptables -A INPUT -p tcp --dport 21 -j DROP
Forensics:
1. Check logs:
cat /var/log/ftp.log | grep "CCC"
2. Memory dump analysis:
gdb -q /usr/sbin/pcmanftpd core.dump
References:
- VulDB
- NVD
- Exploit-DB
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
