PT-2021-6649 · Adobe · Acrobat Reader

Published 2021-09-14 · Updated 2021-10-06 · CVE-2021-39853

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 2021.005.20060 and earlier Adobe Acrobat Reader DC versions 2020.004.30006 and earlier Adobe Acrobat Reader DC versions 2017.011.30199 and earlier

Description The issue is related to a Null pointer dereference, which could allow an unauthenticated attacker to cause an application denial-of-service in the context of the current user. Exploitation requires user interaction, such as opening a malicious file. This can be leveraged by a remote attacker to achieve the denial-of-service.

Recommendations For Adobe Acrobat Reader DC versions 2021.005.20060 and earlier, update to a version later than 2021.005.20060 to resolve the issue. For Adobe Acrobat Reader DC versions 2020.004.30006 and earlier, update to a version later than 2020.004.30006 to resolve the issue. For Adobe Acrobat Reader DC versions 2017.011.30199 and earlier, update to a version later than 2017.011.30199 to resolve the issue. As a temporary workaround, consider avoiding the use of potentially malicious files until a patch is available.

Fix

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2022-01965

CVE-2021-39853

Affected Products

Acrobat Reader

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2021-39853 · Security Note
• https://bdu.fstec.ru/vul/2022-01965 · Security Note
• https://helpx.adobe.com/security/products/acrobat/apsb21-55.html · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-39853 · Vendor Advisory
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39853 · Note