Advisory Details

June 13th, 2017

Microsoft Windows OTL Font Parsing Out-Of-Bounds Read Information Disclosure Vulnerability

CVE ID	CVE-2017-0285
CVSS SCORE	2.6, AV:N/AC:H/Au:N/C:P/I:N/A:N
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Windows
VULNERABILITY DETAILS	This vulnerability allows remote attackers to disclose sensitive information 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 processing of OpenType Layout (OTL) data in font files. The issue results from the lack of proper validation of user-supplied data, which can result in a read outside an allocated object. 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-2017-0285
DISCLOSURE TIMELINE	2017-05-04 - Vulnerability reported to vendor 2017-06-13 - Coordinated public release of advisory
CREDIT	Ke Liu of Tencent's Xuanwu LAB

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