CVE-2024-21638: Azure IPAM solution Elevation of Privilege Vulnerability

Vulnerability summary

CVE-2024-21638 is a critical (CVSS 9.8) Improper Privilege Management vulnerability in azure ipam. EPSS estimates a 1.66% chance of exploitation in the next 30 days, higher than 76.4% of scored vulnerabilities.

Timeline

1. 10-01-2024
   PublishedVulnerability first disclosed.
2. 03-06-2025
   Last modifiedVulnerability information updated.

Description

Azure IPAM (IP Address Management) is a lightweight solution developed on top of the Azure platform designed to help Azure customers manage their IP Address space easily and effectively. By design there is no write access to customers' Azure environments as the Service Principal used is only assigned the Reader role at the root Management Group level. Until recently, the solution lacked the validation of the passed in authentication token which may result in attacker impersonating any privileged user to access data stored within the IPAM instance and subsequently from Azure, causing an elevation of privilege. This vulnerability has been patched in version 3.0.0.

• CWE-269Improper Privilege ManagementThe product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
• CWE-287Improper AuthenticationWhen an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.