Advisory Details

June 9th, 2020

Microsoft Chakra Intl Object Type Confusion Remote Code Execution Vulnerability

ZDI-20-698
ZDI-CAN-10788

CVE ID CVE-2020-1219
CVSS SCORE 7.5, (AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Chakra
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft Chakra. 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 the Intl object in JavaScript. By performing actions in JavaScript, an attacker can trigger a type confusion condition. 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-2020-1219
DISCLOSURE TIMELINE
  • 2020-04-02 - Vulnerability reported to vendor
  • 2020-06-09 - Coordinated public release of advisory
CREDIT Bruno Keith (https://twitter.com/bkth_)
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