PT-2021-20681 · Foxit · Foxit Pdf Reader

Mat Powell · Published 2021-07-30 · Updated 2022-02-08 · CVE-2021-34835

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions: Foxit PDF Reader version 11.0.0.49893

Description: This issue allows remote attackers to execute arbitrary code on affected installations. User interaction is required, where the target must visit a malicious page or open a malicious file. The flaw exists within the handling of Annotation objects due to the lack of validating the existence of an object prior to performing operations on it. An attacker can leverage this to execute code in the context of the current process.

Recommendations: For Foxit PDF Reader version 11.0.0.49893, consider disabling the handling of Annotation objects as a temporary workaround until a patch is available. Restrict access to potentially malicious pages or files to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2021-34835

ZDI-21-917

Affected Products

Foxit Pdf Reader

References · 6

• https://zerodayinitiative.com/advisories/ZDI-21-917 · Security Note
• https://osv.dev/vulnerability/CVE-2021-34835 · Vendor Advisory
• https://foxit.com/support/security-bulletins.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-34835 · Security Note
• https://t.me/cvenotify/18644 · Telegram Post
• https://t.me/cibsecurity/26822 · Telegram Post