Advisory Details

February 10th, 2021

Adobe Acrobat Reader DC Annots File ID Out-Of-Bounds Read Information Disclosure Vulnerability

CVE ID	CVE-2021-21042
CVSS SCORE	3.3, AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
AFFECTED VENDORS	Adobe
AFFECTED PRODUCTS	Acrobat Reader DC
VULNERABILITY DETAILS	This vulnerability allows remote attackers to disclose sensitive information on affected installations of Adobe Acrobat Reader DC. 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 handling of the File ID parameter in the PDF trailer. By performing actions in JavaScript, an attacker can disclose the base address of Annots.api. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process.
ADDITIONAL DETAILS	Adobe has issued an update to correct this vulnerability. More details can be found at: https://helpx.adobe.com/security/products/acrobat/apsb21-09.html
DISCLOSURE TIMELINE	2020-12-09 - Vulnerability reported to vendor 2021-02-10 - Coordinated public release of advisory
CREDIT	Mark Vincent Yason (@MarkYason)

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