Use-after-free in Foxit PDF Reader for Windows and Foxit PDF Editor (formerly Foxit PhantomPDF) - CVE-2021-34834
Published: August 30, 2021
Vulnerability identifier: #VU56165
CSH Severity: High
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-34834
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error when handling the annotation objects in certain PDF files if the same Annotation dictionary is referenced in the page structures for different pages. A remote attacker can trick the victim to open a specially crafted PDF file and execute arbitrary code on the target system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
Affected software
Foxit PDF Reader for Windows
Foxit PDF Editor (formerly Foxit PhantomPDF)
Foxit PDF Editor (formerly Foxit PhantomPDF)
How to mitigate CVE-2021-34834
Install updates from vendor's website.
Foxit PDF Reader for Windows - update to 11.0.1.49938
Foxit PDF Editor (formerly Foxit PhantomPDF) - addressed in versions 10.1.5.37672, 11.0.1.49938
Foxit PDF Editor (formerly Foxit PhantomPDF) - addressed in versions 10.1.5.37672, 11.0.1.49938