CVE-2023-5986
📋 TL;DR
This vulnerability allows attackers to redirect users to malicious websites after successful login by manipulating URL parameters. It affects Schneider Electric software with web interfaces that don't properly validate redirect URLs. Users of affected Schneider Electric products are at risk.
💻 Affected Systems
- Schneider Electric software with web interfaces (specific products not detailed in provided references)
📦 What is this software?
Ecostruxure Power Monitoring Expert by Schneider Electric
View all CVEs affecting Ecostruxure Power Monitoring Expert →
Ecostruxure Power Monitoring Expert by Schneider Electric
View all CVEs affecting Ecostruxure Power Monitoring Expert →
Ecostruxure Power Monitoring Expert by Schneider Electric
View all CVEs affecting Ecostruxure Power Monitoring Expert →
⚠️ Risk & Real-World Impact
Worst Case
Attackers could redirect users to phishing sites that steal credentials or deliver malware, potentially leading to full system compromise.
Likely Case
Users are redirected to phishing pages that capture login credentials or personal information.
If Mitigated
With proper URL validation and user awareness, impact is limited to failed redirect attempts.
🎯 Exploit Status
Requires user interaction (login) but exploitation is straightforward once the vulnerability is understood.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in provided references
Vendor Advisory: https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2023-318-02&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2023-318-02.pdf
Restart Required: Yes
Instructions:
1. Download the security update from Schneider Electric. 2. Apply the patch according to vendor instructions. 3. Restart affected services. 4. Verify the fix.
🔧 Temporary Workarounds
Implement URL validation
allAdd server-side validation to only allow redirects to trusted domains
Disable redirect functionality
allTemporarily disable post-login redirects if not essential
🧯 If You Can't Patch
- Implement web application firewall rules to block suspicious redirect patterns
- Educate users to verify URLs before entering credentials
🔍 How to Verify
Check if Vulnerable:
Test if the application redirects to external URLs after login using manipulated parametersCheck Version:
Check software version through web interface or system commands specific to the Schneider Electric productVerify Fix Applied:
Attempt the same redirect manipulation after patching to confirm it's blocked📡 Detection & Monitoring
Log Indicators:
- Unusual redirect patterns in web server logs
- Multiple failed login attempts followed by redirects to external domains
Network Indicators:
- HTTP 302/303 redirects to unexpected domains
- Traffic to known phishing domains
SIEM Query:
web_redirect AND (external_domain OR suspicious_domain)