PT-2021-6047 · Adobe · Acrobat Reader

Published 2021-05-11 · Updated 2021-09-08 · CVE-2021-28552

Positive Technologies (AI Summary)

CVSS v2.0

9.3

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Acrobat Reader DC versions 2021.001.20155 and earlier Acrobat Reader DC versions 2020.001.30025 and earlier Acrobat Reader DC versions 2017.011.30196 and earlier

Description The issue is related to a Use After Free vulnerability that could allow an unauthenticated attacker to achieve arbitrary code execution in the context of the current user. Exploitation requires user interaction, where a victim must open a malicious file, specifically a specially crafted PDF file. This vulnerability can be leveraged by a remote attacker to execute arbitrary code.

Recommendations For versions 2021.001.20155 and earlier, update to a version later than 2021.001.20155 to resolve the issue. For versions 2020.001.30025 and earlier, update to a version later than 2020.001.30025 to resolve the issue. For versions 2017.011.30196 and earlier, update to a version later than 2017.011.30196 to resolve the issue. As a temporary workaround, consider avoiding the use of XFA templates in Adobe Acrobat Reader DC until a patch is available.

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

BDU:2022-00640

CVE-2021-28552

ZDI-21-661

Affected Products

Acrobat Reader

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2021-28552 · Security Note
• https://helpx.adobe.com/security/products/acrobat/apsb21-37.html · Vendor Advisory
• https://zerodayinitiative.com/advisories/ZDI-21-661 · Security Note
• https://osv.dev/vulnerability/CVE-2021-28552 · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-00640 · Security Note
• https://helpx.adobe.com/security/products/acrobat/apsb21-29.html · Note
• https://cybersecurity-help.cz/vdb/SB2021060839 · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28552 · Note