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zdiMickey Jin & Junzhi Lu of Trend Micro Mobile Security Research TeamZDI-21-148
HistoryFeb 04, 2021 - 12:00 a.m.

Apple macOS CoreText TTF Parsing Out-of-Bounds Read Information Disclosure Vulnerability

2021-02-0400:00:00
Mickey Jin & Junzhi Lu of Trend Micro Mobile Security Research Team
www.zerodayinitiative.com
22
vulnerability
remote attackers
sensitive information
apple macos
coretext library
ttf fonts
crafted data
data structure
arbitrary code

EPSS

0.018

Percentile

88.6%

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Apple macOS. Interaction with the CoreText library is required to exploit this vulnerability but attack vectors may vary depending on the implementation. The specific flaw exists within the parsing of TTF fonts. Crafted data in a TTF font can trigger a read past the end of an allocated data structure. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process.

EPSS

0.018

Percentile

88.6%