#VU48903 Improper Validation of Array Index

Published: 2020-12-09 | Updated: 2020-12-30

Vulnerability identifier: #VU48903

Vulnerability risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-28203


Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Foxit PDF Reader for Windows
Client/Desktop applications / Office applications
Foxit PDF Editor (formerly Foxit PhantomPDF)
Client/Desktop applications / Office applications

Vendor: Foxit Software Inc.


The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to array overflow as the illegal value in the /Size entry causes an error in initializing the array size for storing the compression object streams, and an object number which is larger than the initialization value is used as the array index while parsing the cross-reference streams. A remote attacker can create a specially crafted PDF file, trick the victim into opening it and crash the application.

Install updates from vendor's website.

Vulnerable software versions

Foxit PDF Reader for Windows: 9.0 -

Foxit PDF Editor (formerly Foxit PhantomPDF): -, 9.0 -


External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

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