PT-2021-14823 · Foxit · Foxit Pdf Reader

Aleksandar Nikolic · Published 2021-07-28 · Updated 2022-09-03 · CVE-2021-21893

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 11.0.0.49893

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 As a temporary workaround, consider disabling the JavaScript engine in Foxit Software’s PDF Reader until a patch is available. Restrict access to malicious sites and avoid opening suspicious PDF documents to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2021-21893

Affected Products

Foxit Pdf Reader

References · 6

• 🔥 https://talosintelligence.com/vulnerability_reports/TALOS-2021-1336 · Exploit
• https://osv.dev/vulnerability/CVE-2021-21893 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-21893 · Security Note
• https://t.me/cvenotify/18752 · Telegram Post
• https://t.me/cvenotify/19286 · Telegram Post
• https://t.me/cybersecuritytechnologies/3935 · Telegram Post