Microsoft Azure SQL Managed Instance Documentation SAS Token Incorrect Permission Assignment Authentication Bypass Vulnerability

June 6th, 2024
ZDI-24-581 ZDI-CAN-22281

CVE ID

CVSS Score

10.0 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected Vendors

Microsoft

Affected Products

Azure

Vulnerability Details

This vulnerability allows remote attackers to bypass authentication on Microsoft Azure. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the permissions granted to an SAS token. An attacker can leverage this vulnerability to launch a supply-chain attack and execute arbitrary code on customers' endpoints.

Additional Details

Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://msrc.microsoft.com/update-guide/en-us/acknowledgement/online

Disclosure Timeline

  • 2023-10-03 - Vulnerability reported to vendor
  • 2024-06-06 - Coordinated public release of advisory
  • 2024-07-01 - Advisory Updated

Credit

Nitesh Surana (@_niteshsurana) of Trend Micro Research

Back to Advisories