Advisory Details

November 11th, 2020

Microsoft Internet Explorer array Use-After-Free Remote Code Execution Vulnerability

ZDI-20-1368
ZDI-CAN-11874

CVE ID CVE-2020-17053
CVSS SCORE 8.8, (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Internet Explorer
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft Internet Explorer. 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 handling of arrays in JavaScript. The issue results from the lack of validating the existence of an object prior to performing operations on the object. 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-2020-17053
DISCLOSURE TIMELINE
  • 2020-09-02 - Vulnerability reported to vendor
  • 2020-11-11 - Coordinated public release of advisory
CREDIT Elliot Cao (@iamelli0t) working with Trend Micro's Zero Day Initiative
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