ServiceNow Now Platform Input Validation Vulnerability Leading to Remote Code Execution (CVE-2024-4879) Security Advisory
Executive & SecOps Summary
SECOPS ASSESSMENTServiceNow Now Platform Vancouver and Washington DC releases
Unauthenticated remote attackers can execute arbitrary code within the context of the Now Platform, potentially leading to full system compromise
Apply official security patches and hotfixes immediately, and restrict external access for self-hosted instances while monitoring for IoCs
Affected Products & Version Scope
Remediation & Live Workaround Commands
PATCH & WORKAROUND1. Official Patch & Version Upgrade Commands
ServiceNow has applied updates to hosted instances. Self-hosted customers and partners must obtain and apply the relevant patches and hotfixes immediately by consulting the official ServiceNow Knowledge Base articles KB1644293 and KB1645154.
2. Temporary Workaround & Hardening Configuration
If immediate patching is not feasible, restrict access to the ServiceNow instance using a Web Application Firewall (WAF) or network-level Access Control Lists (ACLs) to limit exposure to trusted IP ranges only.
# Example Nginx configuration to restrict access to trusted administrative subnets
# /etc/nginx/conf.d/servicenow.conf
server {
listen 443 ssl;
server_name servicenow.company.com;
location / {
allow 10.0.0.0/8; # Internal corporate network
deny all;
proxy_pass http://servicenow_backend;
}
}3. Log Audit & IoC Verification Commands
Administrators should inspect application and web server access logs for suspicious patterns indicating remote code execution attempts or payload injections.
# Search access logs for common Java/script injection keywords and suspicious payloads
egrep -i 'runtime|processbuilder|eval|script|exec' /var/log/nginx/access.logBlock Exploits Instantly with Managed Virtual Patching Rules
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Technical Root Cause & Exploitation Mechanics
1. Vulnerability Overview & Root Cause
This vulnerability (CVE-2024-4879) is a critical input validation flaw (CWE-1287) identified in the Vancouver and Washington DC releases of the ServiceNow Now Platform. The root cause lies in the application's failure to properly validate and sanitize user-supplied input before processing it within the execution context, allowing attackers to inject malicious payloads.
2. Exploitation Mechanics & Attack Scenario
An unauthenticated remote attacker can exploit this vulnerability by sending specially crafted HTTP requests containing malicious payloads to vulnerable endpoints of the Now Platform. Because the input validation is insufficient, the platform interprets and executes the injected code within its own security context. This allows for immediate remote code execution (RCE) without requiring any user interaction or prior authentication.
3. Infrastructure & Business Impact
With a CVSS score of 9.8 (Critical) and its inclusion in the CISA KEV catalog, this vulnerability poses an immediate threat as it is actively exploited in the wild. Successful exploitation allows attackers to gain unauthorized access to sensitive business workflows, IT infrastructure data, and user credentials, potentially serving as an entry point for lateral movement within the corporate network.
Official Vendor Advisories & References
ServiceNow has addressed an input validation vulnerability that was identified in Vancouver and Washington DC Now Platform releases. This vulnerability could enable an unauthenticated user to remotely execute code within the context of the Now Platform. ServiceNow applied an update to hosted instances, and ServiceNow released the update to our partners and self-hosted customers. Listed below are the patches and hot fixes that address the vulnerability. If you have not done so already, we recommend applying security patches relevant to your instance as soon as possible.
Frequently Asked SecOps Questions (CVE-2024-4879)
FAQQ1. How critical is CVE-2024-4879 and is it actively exploited in the wild?
CVE-2024-4879 is rated CVSS 9.8 (CRITICAL) with a 30-day EPSS exploitation probability of 100.0%. It is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, requiring immediate emergency remediation.
Q2. Which vendors and products are affected by CVE-2024-4879?
Primary impacted vendors include servicenow across now platform. Scope summary: ServiceNow Now Platform Vancouver and Washington DC releases (specifically self-hosted and unpatched instances)
Q3. What temporary mitigations or workarounds exist for CVE-2024-4879 before patching?
[Mitigation] Apply official security patches and hotfixes immediately, and restrict external access for self-hosted instances while monitoring for IoCs Follow the CLI remediation commands and interactive SecOps checklist on this page to restrict exposure prior to your maintenance window.
Generate an Internal Engineering Notice or CISO Report for CVE-2024-4879
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