Advisory Details

November 21st, 2022

Microsoft Exchange SerializationTypeConverter Deserialization of Untrusted Data Information Disclosure Vulnerability

ZDI-22-1604
ZDI-CAN-18882

CVE ID CVE-2022-41079
CVSS SCORE 4.3, (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Exchange
VULNERABILITY DETAILS

This vulnerability allows remote attackers to disclose sensitive information 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 disclose information 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
  • 2022-11-21 - Coordinated public release of advisory
CREDIT Piotr Bazydlo (@chudypb) of Trend Micro Zero Day Initiative
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