PT-2021-4970 · Adobe · Acrobat Reader
Published
2021-09-14
·
Updated
2021-10-06
·
CVE-2021-39839
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Adobe Acrobat Reader DC versions 2021.005.20060 and earlier
Adobe Acrobat Reader DC versions 2020.004.30006 and earlier
Adobe Acrobat Reader DC versions 2017.011.30199 and earlier
Description
A use-after-free vulnerability exists in the processing of the AcroForm getItem action, which could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction, where a victim must open a malicious file. The vulnerability can be exploited using a specially crafted PDF file, allowing an attacker to execute arbitrary code.
Recommendations
For Adobe Acrobat Reader DC versions 2021.005.20060 and earlier, update to a version later than 2021.005.20060 to resolve the issue.
For Adobe Acrobat Reader DC versions 2020.004.30006 and earlier, update to a version later than 2020.004.30006 to resolve the issue.
For Adobe Acrobat Reader DC 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 the AcroForm getItem action until a patch is available. Restrict access to malicious PDF files to minimize the risk of exploitation.
Fix
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Acrobat Reader