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How the CVE Works:
Shopware’s document retrieval system uses a `deepLinkCode` to grant access to customer documents. This code is meant to be unique per document but lacks sufficient entropy, making it predictable. Attackers can brute-force or guess these codes to retrieve sensitive documents belonging to other customers. The vulnerability arises due to improper Access Control List (ACL) validation, allowing unauthorized users to bypass restrictions by manipulating the `deepLinkCode` parameter in API or web requests.
DailyCVE Form:
Platform: Shopware
Version: <6.6.10.3, <6.5.8.17
Vulnerability: Broken ACL
Severity: Moderate
Date: 2025-04-08
What Undercode Say:
Exploitation:
1. Brute-Force Attack:
for code in {000000..999999}; do
curl -s "https://victim-shop.com/api/documents/$code" | grep "document_data"
done
2. API Manipulation:
Intercept document requests and modify `deepLinkCode` to access unauthorized files.
Protection:
1. Patch Update:
composer require shopware/core:6.6.10.3
2. Rate Limiting:
Implement Nginx/Apache rules to block excessive document requests:
limit_req_zone $binary_remote_addr zone=doc_limit:10m rate=5r/s;
location /api/documents {
limit_req zone=doc_limit burst=10;
}
3. Code Entropy Fix:
Modify document generation to use cryptographically secure codes:
$deepLinkCode = bin2hex(random_bytes(16));
4. ACL Enforcement:
Add server-side validation:
if ($document->customer_id !== $currentUser->id) {
throw new AccessDeniedException();
}
5. Logging & Monitoring:
Alert on suspicious document access patterns.
Detection:
Check logs for repeated document access attempts:
grep "GET /api/documents" access.log | awk '{print $1}' | sort | uniq -c | sort -nr
Mitigation Plugin (Legacy):
For unpatched versions, install Shopware’s official security plugin to enforce stricter ACL checks.
References:
Reported By: https://github.com/advisories/GHSA-68wv-g3fw-pq7q
Extra Source Hub:
Undercode
