CVE-2023-5629
📋 TL;DR
This CVE describes an open redirect vulnerability (CWE-601) in Schneider Electric products that allows attackers to redirect users to malicious websites via crafted URLs. This could lead to phishing attacks and information disclosure. Affected systems are those running vulnerable Schneider Electric software versions.
💻 Affected Systems
- Schneider Electric products (specific products not detailed in provided references)
📦 What is this software?
Eb450 Firmware by Schneider Electric
Eb45e Firmware by Schneider Electric
Eh450 Firmware by Schneider Electric
Eh45e Firmware by Schneider Electric
Er450 Firmware by Schneider Electric
Er45e Firmware by Schneider Electric
Jr240 Firmware by Schneider Electric
Jr900 Firmware by Schneider Electric
Qb150 Firmware by Schneider Electric
Qb450 Firmware by Schneider Electric
Qh150 Firmware by Schneider Electric
Qh450 Firmware by Schneider Electric
Qp150 Firmware by Schneider Electric
Qp450 Firmware by Schneider Electric
Qr150 Firmware by Schneider Electric
Qr450 Firmware by Schneider Electric
⚠️ Risk & Real-World Impact
Worst Case
Successful phishing campaigns leading to credential theft, malware installation, or sensitive data exfiltration from redirected users.
Likely Case
Attackers trick users into visiting malicious sites that mimic legitimate ones to steal credentials or deliver malware.
If Mitigated
Limited impact with proper user awareness training and browser security controls preventing automatic redirects.
🎯 Exploit Status
Open redirect vulnerabilities typically require user interaction (clicking a link) but are easy to exploit once crafted.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in provided references
Vendor Advisory: https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2023-346-01&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2023-346-01.pdf
Restart Required: No
Instructions:
1. Consult the vendor advisory for specific affected products and patches. 2. Apply the recommended updates from Schneider Electric. 3. Verify the fix by testing redirect functionality.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side validation to reject or sanitize URLs containing external domains in redirect parameters.
Implementation varies by web framework; example for Python Flask: validate redirect URLs against allowed list before redirecting.
Use Relative URLs
allConfigure the application to only use relative URLs for redirects instead of full URLs with domains.
Modify application code to use relative paths (e.g., '/dashboard') instead of absolute URLs (e.g., 'http://example.com').
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block requests with suspicious redirect parameters.
- Educate users to avoid clicking on untrusted links and enable browser security features like safe browsing.
🔍 How to Verify
Check if Vulnerable:
Test by appending a redirect parameter with an external URL (e.g., ?redirect=http://malicious.com) to vulnerable endpoints and check if it redirects.Check Version:
Check product version via vendor-specific commands or web interface; refer to product documentation.Verify Fix Applied:
After patching, repeat the test with external URLs; the application should not redirect or should sanitize the URL.📡 Detection & Monitoring
Log Indicators:
- HTTP logs showing requests with redirect parameters to external domains, especially with suspicious referrers or user agents.
Network Indicators:
- Outbound HTTP requests from the application to unexpected external domains following redirects.
SIEM Query:
Example: search 'url=*redirect* AND dest_ip NOT IN (allowed_ips)' in web server logs.