Advisory Details

October 16th, 2024

Microsoft Exchange SerializationTypeConverter Deserialization of Untrusted Data NTLM Relay Vulnerability

CVE ID	CVE-2022-41079
CVSS SCORE	8.8, AV:N/AC:L/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 relay NTLM credentials on affected installations of Microsoft Exchange. Authentication is required to exploit this vulnerability. The specific flaw exists within the SerializationTypeConverter 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 vulnerability to relay NTLM credentials 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-2022-41079
DISCLOSURE TIMELINE	2022-09-20 - Vulnerability reported to vendor 2024-10-16 - Coordinated public release of advisory 2024-10-16 - Advisory Updated
CREDIT	Piotr Bazydlo (@chudypb) of Trend Micro Zero Day Initiative

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