Out-of-bounds write in Foxit PDF Editor (formerly Foxit PhantomPDF) and Foxit PDF Reader for Windows - CVE-2020-26535
Published: September 29, 2020 / Updated: October 28, 2020
Vulnerability identifier: #VU47137
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-2020-26535
CWE-ID: CWE-787
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 boundary error when processing untrusted input within the V8 JavaScript engine, which is resulted from the failure to properly handle the situation where the Index returned during the allocation of thread local storage by TslAlloc function exceeds the limits acceptable by the V8 JavaScript engine. A remote attacker can create a specially crafted PDF file, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code on the target system.
Affected software
Foxit PDF Editor (formerly Foxit PhantomPDF)
Foxit PDF Reader for Windows
Foxit PDF Reader for Windows
How to mitigate CVE-2020-26535
Install updates from vendor's website.
Foxit PDF Editor (formerly Foxit PhantomPDF) - addressed in versions 9.7.4.29600, 10.1.0.37527
Foxit PDF Reader for Windows - update to 10.1
Foxit PDF Reader for Windows - update to 10.1