Quantum Secular Labs / Blog / Advisories

CVE-2024-4879: ServiceNow Improper Input Validation Vulnerability

CVE-2024-4879 is rated critical with a CVSS v3.1 base score of 9.8 and affects ServiceNow Utah, Vancouver, and Washington DC Now Platform. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available. CISA added it to its Known Exploited Vulnerabilities catalog on 2024-07-29, which means exploitation in the wild has been observed.

Vulnerability description

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.

Severity breakdown

CVSS v3.1 9.8: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
  • Attack complexity: Low. No special conditions; the attack can be repeated reliably.
  • Privileges required: None. No account or prior access is needed.
  • User interaction: None. No action from any user is needed.
  • Scope: Unchanged. Impact stays within the vulnerable component.
  • Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
  • Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
  • Availability impact: High. Total loss of availability; the component can be shut down.

Underlying weakness

CWE-1287: Improper Validation of Specified Type of Input

The product receives input that is expected to be of a certain type, but it does not validate or incorrectly validates that the input is actually of the expected type.

Affected products

  • Servicenow: utah; utah early_availability; utah patch_1; utah patch_1_hotfix_1; utah patch_1_hotfix_1a; utah patch_1_hotfix_1b; utah patch_1_hotfix_2; utah patch_10; utah patch_10_hotfix_1; utah patch_10_hotfix_2; utah patch_10a; utah patch_10a_hotfix_1

References