TippingPoint Zero Day Initiative
 

Microsoft Office Excel xlsb File Heap-based Buffer Overflow Remote Code Execution Vulnerability

ZDI-17-727: September 15th, 2017

CVE ID

CVSS Score

Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 29599. For further product information on the TippingPoint IPS:

Vulnerability Details


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Office Excel. 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 processing of Excel Binary files. Crafted data within an xlsb file can trigger an overflow of a heap-based buffer. An attacker can leverage this vulnerability to execute arbitrary 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

    2017-05-05 - Vulnerability reported to vendor
    2017-09-15 - Coordinated public release of advisory

Credit

This vulnerability was discovered by:
    Steven Seeley (mr_me) of Offensive Security