PT-2021-17877 · Adobe · Acrobat Reader

Published 2021-02-09 · Updated 2021-09-08 · CVE-2021-28545

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: Acrobat Reader DC versions 2020.013.20074 and earlier Acrobat Reader DC versions 2020.001.30018 and earlier Acrobat Reader DC versions 2017.011.30188 and earlier

Description: A missing support for integrity check issue allows an unauthenticated attacker to manipulate data in a certified PDF without invalidating the original certification. This can also enable the attacker to show arbitrary content in a certified PDF. Exploitation requires user interaction, where a victim must open the tampered file.

Recommendations: For versions 2020.013.20074 and earlier, update to a version that includes support for an integrity check to prevent data manipulation in certified PDFs. For versions 2020.001.30018 and earlier, update to a version that includes support for an integrity check to prevent data manipulation in certified PDFs. For versions 2017.011.30188 and earlier, update to a version that includes support for an integrity check to prevent data manipulation in certified PDFs.

Fix

Weakness Enumeration

CWE-353

Related Identifiers

CVE-2021-28545

Affected Products

Acrobat Reader

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2021-28545 · Security Note
• https://helpx.adobe.com/security/products/acrobat/apsb21-09.html · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-28545 · Vendor Advisory
• https://t.me/cvenotify/16779 · Telegram Post
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28545 · Note
• https://t.me/cvenotify/12825 · Telegram Post
• https://t.me/cvenotify/15143 · Telegram Post