Advisory Details

April 11th, 2018

Microsoft Office Excel Slicer Use-After-Free Remote Code Execution Vulnerability

CVE ID	CVE-2018-1011
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 slicers and timelines in Excel workbooks. A crafted filter in an Excel workbook can cause a pointer to be reused after it has been freed. An attacker can leverage this vulnerability to execute code under the context of the current process at medium integrity.
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-2018-1011
DISCLOSURE TIMELINE	2018-01-30 - Vulnerability reported to vendor 2018-04-11 - Coordinated public release of advisory 2018-04-11 - Advisory Updated
CREDIT	Steven Seeley (mr_me) of Source Incite

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