PT-2021-4864 · Adobe · Acrobat Reader

Published 2021-09-14 · Updated 2021-10-06 · CVE-2021-39844

Positive Technologies (AI Summary)

CVSS v2.0

10

High

Base vector

AV:N/AC:L/Au:N/C:C/I:C/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 an out-of-bounds read vulnerability that could lead to disclosure of arbitrary memory information in the context of the current user. Exploitation of this issue requires user interaction, where a victim must open a malicious file. This vulnerability may allow a remote attacker to gain unauthorized access to protected information.

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 Adobe Acrobat Reader DC to open files from untrusted sources until a patch is available.

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

BDU:2021-05592

CVE-2021-39844

Affected Products

Acrobat Reader

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2021-39844 · Security Note
• https://bdu.fstec.ru/vul/2021-05592 · Security Note
• https://helpx.adobe.com/security/products/acrobat/apsb21-55.html · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-39844 · Vendor Advisory
• https://t.me/cvenotify/22023 · Telegram Post
• https://cybersecurity-help.cz/vdb/SB2021091436 · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39844 · Note