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 criticalimportant 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)