PT-2021-14801 · Foxit · Foxit Pdf Reader

Aleksandar Nikolic · Published 2021-06-05 · Updated 2022-07-21 · CVE-2021-21831

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Foxit Software’s PDF Reader version 10.1.3.37598

Description A use-after-free vulnerability exists in the JavaScript engine of Foxit Software’s PDF Reader. A specially crafted PDF document can trigger the reuse of previously freed memory, which can lead to arbitrary code execution. An attacker needs to trick the user to open the malicious file to trigger this vulnerability. Exploitation is also possible if a user visits a specially crafted, malicious site if the browser plugin extension is enabled.

Recommendations For version 10.1.3.37598, consider disabling the JavaScript engine in the PDF Reader until a patch is available. Restrict access to malicious sites and avoid opening suspicious PDF documents to minimize the risk of exploitation. As a temporary workaround, disable the browser plugin extension to prevent exploitation through malicious sites.

Exploit

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2021-21831

Affected Products

Foxit Pdf Reader

References · 6

• 🔥 https://talosintelligence.com/vulnerability_reports/TALOS-2021-1294 · Exploit
• https://osv.dev/vulnerability/CVE-2021-21831 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-21831 · Security Note
• https://t.me/cybersecuritytechnologies/3935 · Telegram Post
• https://t.me/cvenotify/19285 · Telegram Post
• https://t.me/cvenotify/18736 · Telegram Post