PT-2021-6640 · Adobe · Acrobat Reader

Published 2021-09-14 · Updated 2021-10-06 · CVE-2021-39849

Positive Technologies (AI Summary)

CVSS v2.0

7.1

High

Base vector

AV:N/AC:M/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Adobe Acrobat Reader DC versions 2017.011.30199 through 2017.011.30199 Adobe Acrobat Reader DC versions 2020.004.30006 through 2020.004.30006 Adobe Acrobat Reader DC versions 2021.005.20060 through 2021.005.20060

Description The issue is related to a null pointer dereference vulnerability. This vulnerability can be exploited by an unauthenticated attacker to achieve an application denial-of-service in the context of the current user. Exploitation requires user interaction, where a victim must open a malicious file.

Recommendations For Adobe Acrobat Reader DC version 2017.011.30199 and earlier, update to a version later than 2017.011.30199 to resolve the issue. For Adobe Acrobat Reader DC version 2020.004.30006 and earlier, update to a version later than 2020.004.30006 to resolve the issue. For Adobe Acrobat Reader DC version 2021.005.20060 and earlier, update to a version later than 2021.005.20060 to resolve the issue. As a temporary workaround, consider avoiding the opening of malicious files to minimize the risk of exploitation.

Fix

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2022-01956

CVE-2021-39849

Affected Products

Acrobat Reader

References · 6

• https://helpx.adobe.com/security/products/acrobat/apsb21-55.html · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-39849 · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-01956 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-39849 · Security Note
• https://t.me/cvenotify/22022 · Telegram Post
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39849 · Note