ServiceNow Incomplete List of Disallowed Inputs Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2024-07-29
• EPSS: 100% chance of exploitation in the next 30 days (higher than 100% of CVEs)
• Critical severity: CVSS 9.8

[ Description ]Official description

ServiceNow has addressed an input validation vulnerability that was identified in the Washington DC, Vancouver, and earlier Now Platform releases. This vulnerability could enable an unauthenticated user to remotely execute code within the context of the Now Platform. The vulnerability is addressed in the listed patches and hot fixes below, which were released during the June 2024 patching cycle. If you have not done so already, we recommend applying security patches relevant to your instance as soon as possible.

CISA: ServiceNow Washington DC, Vancouver, and earlier Now Platform releases contain an incomplete list of disallowed inputs vulnerability in the GlideExpression script. An unauthenticated user could exploit this vulnerability to execute code remotely.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 19 Aug 2024): Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• support.servicenow.com/kbPermissions Required
• support.servicenow.com/kbVendor Advisory
• www.darkreading.com/cloud-security/patchnow-servicenow-critical-rce-bugs-active-exploitPress/Media Coverage
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource