CVE-2023-35393
📋 TL;DR
CVE-2023-35393 is a cross-site scripting (XSS) vulnerability in Azure Apache Hive that allows attackers to inject malicious scripts into web pages viewed by other users. This affects Azure HDInsight clusters running Apache Hive. Attackers could potentially steal session cookies, redirect users, or perform actions on their behalf.
💻 Affected Systems
- Azure HDInsight
📦 What is this software?
Azure Hdinsight by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
An attacker could steal administrator credentials, gain unauthorized access to the Hive cluster, exfiltrate sensitive data, or pivot to other Azure resources.
Likely Case
Attackers inject malicious scripts to steal user session cookies or credentials, potentially compromising individual user accounts within the Hive interface.
If Mitigated
With proper input validation and output encoding, the impact is limited to script execution within the user's browser session only.
🎯 Exploit Status
Requires attacker to have ability to inject malicious content into Hive web interface that other users will view.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply latest Azure HDInsight platform updates
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35393
Restart Required: Yes
Instructions:
1. Log into Azure Portal
2. Navigate to your HDInsight cluster
3. Check for available platform updates
4. Apply the latest security updates
5. Restart affected services
🔧 Temporary Workarounds
Implement Content Security Policy
allAdd CSP headers to restrict script execution sources
Add to web server configuration: Content-Security-Policy: default-src 'self'
Input Validation Filtering
allImplement server-side input validation for all user inputs
🧯 If You Can't Patch
- Restrict access to Hive web interface using network security groups
- Implement web application firewall with XSS protection rules
🔍 How to Verify
Check if Vulnerable:
Check if your Azure HDInsight cluster is running an unpatched version by reviewing update status in Azure PortalCheck Version:
az hdinsight show --name <cluster-name> --resource-group <resource-group> --query properties.clusterVersionVerify Fix Applied:
Verify that latest platform updates have been applied successfully in Azure Portal cluster overview📡 Detection & Monitoring
Log Indicators:
- Unusual script tags or JavaScript in Hive query logs
- Multiple failed login attempts followed by successful login from same IP
Network Indicators:
- Unusual outbound connections from Hive servers
- Traffic patterns suggesting data exfiltration
SIEM Query:
source="hive-logs" AND ("<script>" OR "javascript:" OR "onload=" OR "onerror=")