PT-2021-4845 · Adobe · Acrobat Reader
Published
2021-09-14
·
Updated
2021-10-22
·
CVE-2021-39840
CVSS v2.0
9.3
High
| Vector | AV:N/AC:M/Au:N/C:C/I:C/A:C |
Name of the Vulnerable Software and Affected Versions
Adobe Acrobat Reader DC versions 2017.011.30199 and earlier
Adobe Acrobat Reader DC versions 2020.004.30006 and earlier
Adobe Acrobat Reader DC versions 2021.005.20060 and earlier
Description
The issue is related to a use-after-free vulnerability when processing AcroForms, which could result in arbitrary code execution in the context of the current user. Exploitation requires user interaction, such as visiting a malicious page or opening a malicious file. This allows a remote attacker to execute arbitrary code using a specially crafted PDF file.
Recommendations
For Adobe Acrobat Reader DC versions 2017.011.30199 and earlier, update to a version later than 2017.011.30199 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 2021.005.20060 and earlier, update to a version later than 2021.005.20060 to resolve the issue.
As a temporary workaround, consider avoiding the use of AcroForms in Adobe Acrobat Reader DC until a patch is available.
Fix
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Acrobat Reader