Advisory Details

April 16th, 2018

Microsoft Chakra Typed Array JIT Optimization Use-After-Free Remote Code Execution Vulnerability

CVE ID	CVE-2017-11889
CVSS SCORE	6.8, AV:N/AC:M/Au:N/C:P/I:P/A:P
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Chakra
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code 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 generation of JIT code for functions that manipulate typed arrays. By performing actions in JavaScript, an attacker can cause a pointer to be reused after it has been freed. An attacker can leverage this vulnerability to execute code under 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-2017-11889
DISCLOSURE TIMELINE	2017-11-07 - Vulnerability reported to vendor 2018-04-16 - Coordinated public release of advisory 2018-04-16 - Advisory Updated
CREDIT	Anonymous

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