Advisory Details

January 5th, 2018

Microsoft Chakra Memory Allocator Integer Overflow Remote Code Execution Vulnerability

ZDI-18-066
ZDI-CAN-5484

CVE ID CVE-2018-0772
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 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:
https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2018-0772
DISCLOSURE TIMELINE
  • 2017-12-12 - Vulnerability reported to vendor
  • 2018-01-05 - Coordinated public release of advisory
CREDIT Anonymous
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