Advisory Details

September 12th, 2017

Microsoft Office Word WordPerfect Document Converter Heap-based Buffer Overflow Remote Code Execution Vulnerability

CVE ID	CVE-2017-8744
CVSS SCORE	6.8, AV:N/AC:M/Au:N/C:P/I:P/A:P
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Office Word
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Office Word. 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 converter for WordPerfect documents. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code under the context of the 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-2017-8744
DISCLOSURE TIMELINE	2017-06-14 - Vulnerability reported to vendor 2017-09-12 - Coordinated public release of advisory
CREDIT	Lucas Leong of Trend Micro

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