Advisory Details

May 15th, 2019

Microsoft Edge CDXImageRenderTarget Double Free Remote Code Execution Vulnerability

ZDI-19-470
ZDI-CAN-8376

CVE ID CVE-2019-0940
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 Edge
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Edge. 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 rendering of pattern images within HTML canvas elements. By manipulating a document's elements, an attacker 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.

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-2019-0940
DISCLOSURE TIMELINE
  • 2019-05-15 - Vulnerability reported to vendor
  • 2019-05-15 - Coordinated public release of advisory
CREDIT Arthur Gerkis of Exodus Intelligence (@ax330d)
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