Advisory Details

November 21st, 2018

Microsoft Word doc File Use-After-Free Remote Code Execution Vulnerability

ZDI-18-1356
ZDI-CAN-6706

CVE ID CVE-2018-8573
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 Word
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Office Word. 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 processing of .doc files. Crafted data in a .doc file can cause a pointer to be reused after it has been freed. An attacker can leverage this vulnerability to execute code in the context of the current process at medium integrity.

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-2018-8573
DISCLOSURE TIMELINE
  • 2018-07-10 - Vulnerability reported to vendor
  • 2018-11-21 - Coordinated public release of advisory
CREDIT Jaanus Kp, Clarified Security
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