Adobe Security Bulletin

Last updated on Jan 24, 2023

Security Updates Available for Adobe Acrobat and Reader | APSB20-67

Bulletin ID	Date Published	Priority
APSB20-67	November 03, 2020	2

Summary

Adobe has released security updates for Adobe Acrobat and Reader for Windows and macOS. These updates address critical, important and moderate vulnerabilities. Successful exploitation could lead to arbitrary code execution in the context of the current user.

Affected Versions

Product	Track	Affected Versions	Platform
Acrobat DC	Continuous	2020.012.20048 and earlier versions	Windows & macOS
Acrobat Reader DC	Continuous	2020.012.20048 and earlier versions	Windows & macOS

Acrobat 2020	Classic 2020	2020.001.30005 and earlier versions	Windows & macOS
Acrobat Reader 2020	Classic 2020	2020.001.30005 and earlier versions	Windows & macOS

Acrobat 2017	Classic 2017	2017.011.30175  and earlier versions	Windows & macOS
Acrobat Reader 2017	Classic 2017	2017.011.30175  and earlier versions	Windows & macOS

Solution

Adobe recommends users update their software installations to the latest versions by following the instructions below.    

The latest product versions are available to end users via one of the following methods:    

Users can update their product installations manually by choosing Help > Check for Updates.     
The products will update automatically, without requiring user intervention, when updates are detected.     
The full Acrobat Reader installer can be downloaded from the Acrobat Reader Download Center.

For IT administrators (managed environments):     

Download the enterprise installers from ftp://ftp.adobe.com/pub/adobe/, or refer to the specific release note version for links to installers.     
Install updates via your preferred methodology, such as AIP-GPO, bootstrapper, SCUP/SCCM (Windows), or on macOS, Apple Remote Desktop and SSH.

Adobe categorizes these updates with the following priority ratings and recommends users update their installation to the newest version:    

Product	Track	Updated Versions	Platform	Priority Rating	Availability
Acrobat DC	Continuous	2020.013.20064	Windows and macOS	2	Windows     macOS
Acrobat Reader DC	Continuous	2020.013.20064	Windows and macOS	2	Windows macOS

Acrobat 2020	Classic 2020	2020.001.30010	Windows and macOS	2	Windows     macOS
Acrobat Reader 2020	Classic 2020	2020.001.30010	Windows and macOS	2	Windows macOS

Acrobat 2017	Classic 2017	2017.011.30180	Windows and macOS	2	Windows macOS
Acrobat Reader 2017	Classic 2017	2017.011.30180	Windows and macOS	2	Windows macOS

Vulnerability Details

Vulnerability Category	Vulnerability Impact	Severity	CVE Number
Heap-based buffer overflow	Arbitrary Code Execution	Critical	CVE-2020-24435
Improper access control	Local privilege escalation	Important	CVE-2020-24433
Improper input validation	Arbitrary JavaScript Execution	Important	CVE-2020-24432
Signature validation bypass	Minimal (defense-in-depth fix)	Moderate	CVE-2020-24439
Signature verification bypass	Local privilege escalation	Important	CVE-2020-24429
Improper input validation	Information Disclosure	Important	CVE-2020-24427
Security feature bypass	Dynamic library injection	Important	CVE-2020-24431
Out-of-bounds write	Arbitrary Code Execution	Critical	CVE-2020-24436
Out-of-bounds read	Information Disclosure	Moderate	CVE-2020-24426 CVE-2020-24434
Race Condition	Local privilege escalation	Important	CVE-2020-24428
Use-after-free	Arbitrary Code Execution	Critical	CVE-2020-24430 CVE-2020-24437
Use-after-free	Information Disclosure	Moderate	CVE-2020-24438

Acknowledgements

Adobe would like to thank the following individuals and organizations for reporting the relevant issues and for working with Adobe to help protect our customers:    

Kimiya working with Trend Micro Zero Day Initiative (CVE-2020-24434, CVE-2020-24436)
Mark Vincent Yason (@MarkYason) working with Trend Micro Zero Day Initiative (CVE-2020-24426, CVE-2020-24438)
Yuebin Sun(@yuebinsun) of Tencent Security Xuanwu Lab (CVE-2020-24439)
Thijs Alkemade from Computest Research Division(CVE-2020-24428, CVE-2020-24429)
Lasse Trolle Borup of Danish Cyber Defence (CVE-2020-24433)
Aleksandar Nikolic of Cisco Talos (CVE-2020-24435, CVE-2020-24437)
Haboob Labs.( CVE-2020-24427)
Hou JingYi (@hjy79425575) of Qihoo 360 CERT (CVE-2020-24431)
Alan Chang Enze of STAR Labs (CVE-2020-24430)
Simon Rohlmann, Vladislav Mladenov, Christian Mainka and Jörg Schwenk from Ruhr University Bochum, Chair for Network and Data Security (CVE-2020-24432)

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