Advisory Details

October 15th, 2021

Foxit PDF Reader JPG2000 File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability

CVE ID	CVE-2021-34971
CVSS SCORE	7.8, AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AFFECTED VENDORS	Foxit
AFFECTED PRODUCTS	PDF Reader
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader. 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 parsing of PDF files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.
ADDITIONAL DETAILS	Foxit has issued an update to correct this vulnerability. More details can be found at: https://www.foxit.com/support/security-bulletins.html
DISCLOSURE TIMELINE	2021-09-01 - Vulnerability reported to vendor 2021-10-15 - Coordinated public release of advisory
CREDIT	Milan Kyselica of IstroSec.

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