Advisory Details

August 18th, 2022

Microsoft Outlook MIME Header Heap Corruption Denial-of-Service Vulnerability

ZDI-22-1074
ZDI-CAN-17384

CVE ID CVE-2022-35742
CVSS SCORE 7.5, AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Outlook
VULNERABILITY DETAILS

This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Microsoft Outlook. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the handling of MIME headers. Crafted MIME headers within an email message can cause Outlook to release an invalid pointer. An attacker can leverage this vulnerability to create a persistent denial-of-service condition on the Microsoft Outlook application.

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-2022-35742
DISCLOSURE TIMELINE
  • 2022-05-25 - Vulnerability reported to vendor
  • 2022-08-18 - Coordinated public release of advisory
CREDIT insu of 78 Research Lab
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