CVE-2024-22408
📋 TL;DR
This vulnerability in Shopware's Flow Builder allows attackers to bypass URL validation in webhook actions, enabling Server-Side Request Forgery (SSRF) attacks. Malicious users can send requests to internal systems that should be inaccessible from external networks. All Shopware installations using vulnerable versions of the Flow Builder functionality are affected.
💻 Affected Systems
- Shopware
📦 What is this software?
Shopware by Shopware
⚠️ Risk & Real-World Impact
Worst Case
Attackers could access sensitive internal services, exfiltrate data from internal APIs, or pivot to attack other internal systems through the compromised Shopware instance.
Likely Case
Attackers scan and access internal services, potentially retrieving sensitive information from internal APIs or metadata services that should not be externally accessible.
If Mitigated
With proper network segmentation and egress filtering, the impact is limited to the Shopware server's network segment, preventing access to critical internal systems.
🎯 Exploit Status
Exploitation requires authenticated access to create/modify Flow Builder actions. The vulnerability is in URL validation logic for webhook actions.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.5.7.4 (Commercial Plugin) or Security Plugin for Shopware 6.4
Vendor Advisory: https://github.com/shopware/shopware/security/advisories/GHSA-3535-m8vh-vrmw
Restart Required: Yes
Instructions:
1. Update to Shopware 6.5.7.4 if using Commercial Plugin. 2. For Shopware 6.4 installations, install and update the Security Plugin. 3. For older 6.4/6.5 versions, install the corresponding security plugin. 4. Restart the Shopware application after patching.
🔧 Temporary Workarounds
Disable Flow Builder Webhook Actions
allTemporarily disable or restrict access to Flow Builder functionality that creates webhook actions until patching is complete.
Network Egress Filtering
allImplement firewall rules to restrict outbound connections from Shopware servers to only necessary external services.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Shopware servers from sensitive internal systems
- Monitor and alert on unusual outbound connections from Shopware servers to internal IP ranges
🔍 How to Verify
Check if Vulnerable:
Check Shopware version and plugin versions. If using Shopware 6.5 with Commercial Plugin earlier than 6.5.7.4, or Shopware 6.4 without Security Plugin, you are vulnerable.Check Version:
Check Shopware admin panel or application logs for version informationVerify Fix Applied:
Verify Shopware version is 6.5.7.4 or higher, or confirm Security Plugin is installed and updated for Shopware 6.4 installations.📡 Detection & Monitoring
Log Indicators:
- Unusual outbound HTTP requests from Shopware server to internal IP addresses
- Multiple failed webhook attempts to internal services
Network Indicators:
- HTTP requests from Shopware server to internal metadata services (169.254.169.254, etc.)
- Requests to internal API endpoints from Shopware server
SIEM Query:
source_ip=SHOPWARE_SERVER_IP AND dest_ip=INTERNAL_RANGE AND protocol=HTTP