Advisory Details

June 13th, 2018

Microsoft Chakra Typed Array Use-After-Free Information Disclosure Vulnerability

ZDI-18-580
ZDI-CAN-6050

CVE ID CVE-2018-8236
CVSS SCORE 5.1, (AV:N/AC:H/Au:N/C:P/I:P/A:P)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Chakra
VULNERABILITY DETAILS


This vulnerability allows remote attackers to disclose sensitive information on vulnerable 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 typed arrays in JavaScript. By performing actions in JavaScript, an attacker can cause a typed array object to be accessed after it is no longer in a usable state. An attacker can leverage this in conjunction with other vulnerabilities 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-2018-8236
DISCLOSURE TIMELINE
  • 2018-04-13 - Vulnerability reported to vendor
  • 2018-06-13 - Coordinated public release of advisory
  • 2018-06-13 - Advisory Updated
CREDIT Chakra
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