Vulnerability · Published May 7, 2024 · Assigned by zdi

CVE-2021-34957Foxit PDF Editor Highlight Annotation Use-After-Free Remote Code Execution Vulnerability

High 7.8

In plain English

A high-severity use-after-free in PDF Editor from Foxit. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 29% of all known vulnerabilities).

Severity (CVSS 3.0)7.8High

Exploit odds (30 days)0.3%top 71.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Foxit PDF Editor Highlight Annotation Use-After-Free Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Editor. 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 Annotation objects. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-14358.

Affected products (as reported)

Vendor	Product	Versions
Foxit	PDF Editor	11.0.0.49893

Weakness: CWE-416 · Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

ZDI-21-1188 x_research-advisory
vendor-provided URL vendor-advisory