CVE-2024-8923
📋 TL;DR
This is a critical input validation vulnerability in ServiceNow's Now Platform that allows unauthenticated remote code execution. All ServiceNow instances running vulnerable versions are affected, including both hosted and self-hosted deployments. The vulnerability enables attackers to execute arbitrary code on the target system.
💻 Affected Systems
- ServiceNow Now Platform
📦 What is this software?
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
Servicenow by Servicenow
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to execute arbitrary code, steal sensitive data, deploy ransomware, or establish persistent access to the entire ServiceNow environment and potentially connected systems.
Likely Case
Attackers exploit the vulnerability to gain initial access, deploy web shells, exfiltrate sensitive business data, and move laterally within the network.
If Mitigated
With proper network segmentation, intrusion detection, and timely patching, impact is limited to isolated ServiceNow instances with minimal data exposure.
🎯 Exploit Status
The vulnerability allows unauthenticated exploitation with high CVSS score (9.8), suggesting relatively straightforward exploitation. No public exploit details available at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patches and hot fixes detailed in KB1706070
Vendor Advisory: https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB1706070
Restart Required: Yes
Instructions:
1. Review ServiceNow KB1706070 for specific patch versions. 2. Apply the appropriate patch or hot fix for your ServiceNow instance version. 3. Restart the ServiceNow instance. 4. Verify the patch was successfully applied.
🔧 Temporary Workarounds
Network Access Restriction
allRestrict network access to ServiceNow instances to only trusted IP addresses and networks
Web Application Firewall Rules
allImplement WAF rules to block suspicious input patterns and RCE attempts
🧯 If You Can't Patch
- Implement strict network segmentation to isolate ServiceNow instances from critical systems
- Deploy enhanced monitoring and intrusion detection specifically for ServiceNow traffic and unusual process execution
🔍 How to Verify
Check if Vulnerable:
Check your ServiceNow instance version against the patched versions listed in KB1706070Check Version:
In ServiceNow, navigate to System Diagnostics > Stats > About to view platform versionVerify Fix Applied:
Verify that your ServiceNow instance is running a patched version from KB1706070 and that no unauthorized changes have been made to the system📡 Detection & Monitoring
Log Indicators:
- Unusual process execution from ServiceNow components
- Suspicious input patterns in web server logs
- Unauthorized file modifications or creations
Network Indicators:
- Unusual outbound connections from ServiceNow servers
- Suspicious payloads in HTTP requests to ServiceNow endpoints
SIEM Query:
source="servicenow" AND (process_execution="*cmd*" OR process_execution="*powershell*" OR process_execution="*bash*")