Advisory Details

November 6th, 2023

Microsoft Azure US Accelarators Synapse SAS Token Incorrect Permission Assignment Authentication Bypass Vulnerability

CVE ID
CVSS SCORE	8.8, AV:N/AC:L/PR:N/UI:R/S:U/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://portal.msrc.microsoft.com/en-us/security-guidance/researcher-acknowledgments-online-services
DISCLOSURE TIMELINE	2023-10-03 - Vulnerability reported to vendor 2023-11-06 - Coordinated public release of advisory
CREDIT	Nitesh Surana (@_niteshsurana) of Trend Micro Research

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