Advisory Details

March 17th, 2021

Microsoft Office Graph Uninitialized Variable Remote Code Execution Vulnerability

ZDI-21-334
ZDI-CAN-12753

CVE ID CVE-2021-27057
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 Office
VULNERABILITY DETAILS

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

The specific flaw exists within the Graph COM object. The issue results from the lack of proper initialization of memory prior to accessing it. 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://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27057
DISCLOSURE TIMELINE
  • 2021-01-05 - Vulnerability reported to vendor
  • 2021-03-17 - Coordinated public release of advisory
CREDIT Anonymous
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