Microsoft Exchange FlatFileTraceListener Exposed Dangerous Function Denial-of-Service Vulnerability

November 22nd, 2022
ZDI-22-1646 ZDI-CAN-18954

CVE ID

CVE-2022-41082

CVSS Score

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

Affected Vendors

Microsoft

Affected Products

Exchange

Vulnerability Details

This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Microsoft Exchange. Authentication is required to exploit this vulnerability.

The specific flaw exists within the FlatFileTraceListener class. The issue results from the exposure of a dangerous function. An attacker can leverage this vulnerability to create a denial-of-service condition on the 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-2022-41082

Disclosure Timeline

  • 2022-09-29 - Vulnerability reported to vendor
  • 2022-11-22 - Coordinated public release of advisory

Credit

Piotr Bazydlo (@chudypb) of Trend Micro Zero Day Initiative

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