Advisory Details

July 14th, 2015

Microsoft Office Excel table Tag Use-After-Free Information Disclosure Vulnerability

CVE ID	CVE-2015-2375
CVSS SCORE	6.4, AV:N/AC:L/Au:N/C:P/I:N/A:P
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Office Excel
TREND MICRO CUSTOMER PROTECTION	Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID ['19800']. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS	This vulnerability allows remote attackers to read freed memory 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 processing of the altText and altTextSummary properties of the table tag. Under some conditions, strings representing those values are used in one thread while they are being freed in another thread, leading to a race condition. An attacker can leverage this vulnerability to disclose information 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://technet.microsoft.com/en-us/library/security/MS15-070
DISCLOSURE TIMELINE	2015-04-21 - Vulnerability reported to vendor 2015-07-14 - Coordinated public release of advisory
CREDIT	3S Labs

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