Advisory Details

October 10th, 2017

Microsoft Windows XLS File Heap-based Buffer Overflow Remote Code Execution Vulnerability

ZDI-17-839
ZDI-CAN-4669

CVE ID CVE-2017-8718
CVSS SCORE 6.8, (AV:N/AC:M/Au:N/C:P/I:P/A:P)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Windows
VULNERABILITY DETAILS


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Windows. 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 Microsoft Jet OLEDB provider for Excel files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length, heap-based buffer. An attacker can leverage this vulnerability to execute arbitrary 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-2017-8718
DISCLOSURE TIMELINE
  • 2017-05-04 - Vulnerability reported to vendor
  • 2017-10-10 - Coordinated public release of advisory
CREDIT Zhou Yu
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