Advisory Details

February 28th, 2018

Microsoft Office Excel XLS File Type Confusion Remote Code Execution Vulnerability

CVE ID	CVE-2018-0841
CVSS SCORE	6.8, AV:N/AC:M/Au:N/C:P/I:P/A:P
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Office Excel
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 XLS files. The issue results from the lack of proper validation of user-supplied data, which can result in a type confusion condition. An attacker can leverage this vulnerability to execute 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-2018-0841
DISCLOSURE TIMELINE	2017-12-07 - Vulnerability reported to vendor 2018-02-28 - Coordinated public release of advisory 2018-02-28 - Advisory Updated
CREDIT	A3F2160DCA1BDE70DA1D99ED267D5DC1EC336192

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