Advisory Details

October 11th, 2017

Microsoft Office Excel xls File Out-Of-Bounds Read Information Disclosure Vulnerability

ZDI-17-847
ZDI-CAN-4948

CVE ID CVE-2017-11790
CVSS SCORE 2.6, (AV:N/AC:H/Au:N/C:P/I:N/A:N)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Office Excel
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 29151. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS


This vulnerability allows remote attackers to disclose sensitive information 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 workbook files. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in 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-2017-11790
DISCLOSURE TIMELINE
  • 2017-07-06 - Vulnerability reported to vendor
  • 2017-10-11 - Coordinated public release of advisory
CREDIT Jaanus Kp
Clarified Security
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