Advisory Details

August 13th, 2020

Microsoft Outlook EML Rendering Out-Of-Bounds Read Remote Code Execution Vulnerability

ZDI-20-999
ZDI-CAN-10914

CVE ID CVE-2020-1493
CVSS SCORE 7.8, AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Outlook
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft Outlook. User interaction is required to exploit this vulnerability in that the target must open a malicious email.

The specific flaw exists within the rendering of emails. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated data structure. An attacker can leverage this vulnerability to execute code in the context of the current process.

ADDITIONAL DETAILS Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1493
DISCLOSURE TIMELINE
  • 2020-05-07 - Vulnerability reported to vendor
  • 2020-08-13 - Coordinated public release of advisory
CREDIT 0neb1n
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