Main Vulnerability Database Vulnerabilities #VU50542

Use-after-free in Adobe Reader and Adobe Acrobat - CVE-2021-21028

Published: February 9, 2021

Vulnerability identifier: #VU50542

CSH Severity: High

CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-21028

CWE-ID: CWE-416

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing PDF files. A remote attacker can create a specially crafted PDF file, trick the victim into opening it, trigger a use-after-free error and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Affected software

Adobe Reader
Adobe Acrobat

How to mitigate CVE-2021-21028

Install updates from vendor's website.

Adobe Reader - addressed in versions 17.011.30190, 20.001.30020, 21.001.20135
Adobe Acrobat - addressed in versions 17.011.30190, 20.001.30020, 21.001.20135

External References

https://helpx.adobe.com/security/products/acrobat/apsb21-09.html

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