Advisory Details

June 2nd, 2021

Apple macOS ImageIO PICT File Parsing Out-Of-Bounds Read Information Disclosure Vulnerability

CVE ID	CVE-2021-1838
CVSS SCORE	3.3, AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
AFFECTED VENDORS	Apple
AFFECTED PRODUCTS	macOS
VULNERABILITY DETAILS	This vulnerability allows remote attackers to disclose sensitive information on affected installations of Apple macOS. Interaction with the ImageIO library is required to exploit this vulnerability but attack vectors may vary depending on the implementation. The specific flaw exists within the ImageIO framework. Crafted data in a PICT image 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.
ADDITIONAL DETAILS	Apple has issued an update to correct this vulnerability. More details can be found at: https://support.apple.com/HT212146
DISCLOSURE TIMELINE	2020-12-16 - Vulnerability reported to vendor 2021-06-02 - Coordinated public release of advisory
CREDIT	Mickey Jin & Junzhi Lu of Trend Micro Mobile Security Research Team

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