Security Alert (A21-07-05): Multiple Vulnerabilities in Adobe Reader/Acrobat


 

Published on: 14 July 2021

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Description:

Security updates are released for Adobe Reader and Acrobat to address multiple vulnerabilities. A remote attacker would entice a targeted user to open a specially crafted PDF file to exploit the vulnerabilities.

 

Affected Systems:

  • Acrobat DC for Windows and macOS Continuous 2021.005.20054 and earlier versions 
  • Acrobat Reader DC for Windows and macOS Continuous 2021.005.20054 and earlier versions
  • Acrobat 2020 for Windows and macOS Classic 2020 2020.004.30005 and earlier versions
  • Acrobat Reader 2020 for Windows and macOS Classic 2020 2020.004.30005 and earlier versions  
  • Acrobat 2017 for Windows and macOS Classic 2017 2017.011.30197  and earlier versions 
  • Acrobat Reader 2017 for Windows and macOS Classic 2017 2017.011.30197 and earlier versions

 

Impact:

A successful exploitation could lead to arbitrary code execution, tampering, information disclosure and denial-of-service on an affected system.

 

Recommendation:

Users of affected systems should update the Adobe Reader and Acrobat to the following versions to address the issues. The updates can be obtained by using the auto-update mechanism or by downloading at the following URLs:

  • Acrobat DC for Windows and macOS Continuous 2021.005.20058
    https://www.adobe.com/devnet-docs/acrobatetk/tools/ReleaseNotesDC/index.html#continuous-track
  • Acrobat Reader DC for Windows and macOS Continuous 2021.005.20058
    https://www.adobe.com/devnet-docs/acrobatetk/tools/ReleaseNotesDC/index.html#continuous-track
  • Acrobat 2020 for Windows and macOS Classic 2020 2020.004.30006
    https://www.adobe.com/devnet-docs/acrobatetk/tools/ReleaseNotesDC/index.html#classic-track
  • Acrobat Reader 2020 for Windows and macOS Classic 2020 2020.004.30006
    https://www.adobe.com/devnet-docs/acrobatetk/tools/ReleaseNotesDC/index.html#classic-track
  • Acrobat 2017 for Windows and macOS Classic 2017 2017.011.30199
    https://www.adobe.com/devnet-docs/acrobatetk/tools/ReleaseNotesDC/index.html#id3
  • Acrobat Reader 2017 for Windows and macOS Classic 2017 2017.011.30199
    https://www.adobe.com/devnet-docs/acrobatetk/tools/ReleaseNotesDC/index.html#id3

 

More Information:

  • https://helpx.adobe.com/security/products/acrobat/apsb21-51.html
  • https://www.hkcert.org/security-bulletin/adobe-monthly-security-update-july-2021
  • https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28635
  • https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28639
  • https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28641
  • https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28644
  • https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35980
  • https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35981
  • https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35983 (to CVE-2021-35985)
  • https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35987
  • https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35988


Tag: Adobe , Acrobat , Acrobat Reader , Adobe Reader
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