PT-2021-6800 · Adobe · Acrobat Reader

Published 2021-09-14 · Updated 2022-02-05 · CVE-2021-39861

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Acrobat Reader DC versions 2021.005.20060 and earlier Acrobat Reader DC versions 2020.004.30006 and earlier 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. This vulnerability can be exploited if a victim opens a malicious file, allowing an attacker to gain unauthorized access to protected memory information. Exploitation requires user interaction.

Recommendations For versions 2021.005.20060 and earlier, update to a version later than 2021.005.20060 to resolve the issue. For versions 2020.004.30006 and earlier, update to a version later than 2020.004.30006 to resolve the issue. For 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 specially crafted files that could trigger the out-of-bounds read vulnerability until a patch is available.

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

BDU:2022-02223

CVE-2021-39861

Affected Products

Acrobat Reader

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2021-39861 · Security Note
• https://bdu.fstec.ru/vul/2022-02223 · Security Note
• https://osv.dev/vulnerability/CVE-2021-39861 · Vendor Advisory
• https://helpx.adobe.com/security/products/acrobat/apsb21-55.html · Vendor Advisory
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39861 · Note