PT-2021-3421 · Adobe · Acrobat Reader

Published 2021-05-11 · Updated 2021-09-15 · CVE-2021-28553

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 Acrobat Reader DC versions 2021.001.20150 and earlier Acrobat Reader DC versions 2020.001.30020 and earlier Acrobat Reader DC versions 2017.011.30194 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 could enable a remote attacker to execute arbitrary code in the system.

Recommendations For versions 2021.001.20150 and earlier, update to a version later than 2021.001.20150 to resolve the issue. For versions 2020.001.30020 and earlier, update to a version later than 2020.001.30020 to resolve the issue. For versions 2017.011.30194 and earlier, update to a version later than 2017.011.30194 to resolve the issue. As a temporary workaround, consider avoiding the use of Adobe Reader DC to open PDF files from untrusted sources until a patch is available.

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

BDU:2021-03273

CVE-2021-28553

Affected Products

Acrobat Reader

References · 8

• https://helpx.adobe.com/security/products/acrobat/apsb21-29.html · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-28553 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-03273 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/664618 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-28553 · Security Note
• https://t.me/cibsecurity/28238 · Telegram Post
• https://cybersecurity-help.cz/vdb/SB2021051143 · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28553 · Note