Advisory Details

September 19th, 2023

Microsoft Exchange SharedTypeResolver Deserialization of Untrusted Data Remote Code Execution Vulnerability

CVE ID	CVE-2023-36745
CVSS SCORE	7.5, AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Exchange
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft Exchange. Authentication is required to exploit this vulnerability. The specific flaw exists within the lack of protection against deserialization of the SharedTypeResolver class. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of SYSTEM.
ADDITIONAL DETAILS	Microsoft has issued an update to correct this vulnerability. More details can be found at: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36745
DISCLOSURE TIMELINE	2023-07-11 - Vulnerability reported to vendor 2023-09-19 - Coordinated public release of advisory
CREDIT	Piotr Bazydlo (@chudypb) of Trend Micro Zero Day Initiative

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