Advisory Details

August 14th, 2018

Microsoft Windows Font Subsetting Integer Overflow Remote Code Execution Vulnerability

CVE ID	CVE-2018-8344
CVSS SCORE	6.8, AV:N/AC:M/Au:N/C:P/I:P/A:P
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Windows
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Windows. 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 FontSub.dll module. Crafted data in a font file can trigger an integer overflow before allocating a buffer. An attacker can leverage this vulnerability to execute 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-2018-8344
DISCLOSURE TIMELINE	2018-05-08 - Vulnerability reported to vendor 2018-08-14 - Coordinated public release of advisory 2018-08-14 - Advisory Updated
CREDIT	Pengsu Cheng of Trend Micro Security Research

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