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zdi3S LabsZDI-15-328
HistoryJul 14, 2015 - 12:00 a.m.

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

2015-07-1400:00:00
3S Labs
www.zerodayinitiative.com
10

EPSS

0.529

Percentile

97.6%

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.