TippingPoint Zero Day Initiative
 

Microsoft Chakra Memory Allocator Integer Overflow Remote Code Execution Vulnerability

ZDI-18-066: January 5th, 2018

CVE ID

CVSS Score

Affected Vendors

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 Chakra's memory allocation routines. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before allocating a buffer and writing to memory. An attacker can leverage this vulnerability to execute code under the context of the current process.

Vendor Response

Microsoft has issued an update to correct this vulnerability. More details can be found at:

Disclosure Timeline

    2017-12-12 - Vulnerability reported to vendor
    2018-01-05 - Coordinated public release of advisory

Credit

This vulnerability was discovered by:
    Anonymous