Security Alert (A21-09-13): Multiple Vulnerabilities in Adobe Reader/Acrobat


 

Published on: 15 September 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 Continuous 2021.005.20060 and earlier versions
  • Acrobat Reader DC for Windows Continuous 2021.005.20060 and earlier versions
  • Acrobat DC for macOS Continuous 2021.005.20058 and earlier versions
  • Acrobat Reader DC for macOS Continuous 2021.005.20058 and earlier versions
  • Acrobat 2020 for Windows and macOS Classic 2020 2020.004.30006 and earlier versions 
  • Acrobat Reader 2020 for Windows and macOS Classic 2020 2020.004.30006 and earlier versions
  • Acrobat 2017 for Windows and macOS Classic 2017 2017.011.30199 and earlier versions
  • Acrobat Reader 2017 for Windows and macOS Classic 2017 2017.011.30199 and earlier versions

 

Impact:

A successful exploitation could lead to arbitrary code execution, denial of service or information disclosure 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 2021.007.20091
    https://www.adobe.com/devnet-docs/acrobatetk/tools/ReleaseNotesDC/index.html#continuous-track
  • Acrobat Reader DC for Windows and macOS Continuous 2021.007.20091
    https://www.adobe.com/devnet-docs/acrobatetk/tools/ReleaseNotesDC/index.html#continuous-track
  • Acrobat 2020 for Windows and macOS Classic 2020 2020.004.30015
    https://www.adobe.com/devnet-docs/acrobatetk/tools/ReleaseNotesDC/index.html#classic-track
  • Acrobat Reader 2020 for Windows and macOS Classic 2020 2020.004.30015
    https://www.adobe.com/devnet-docs/acrobatetk/tools/ReleaseNotesDC/index.html#classic-track
  • Acrobat 2017 for Windows and macOS Classic 2017 2017.011.30202
    https://www.adobe.com/devnet-docs/acrobatetk/tools/ReleaseNotesDC/index.html#id3
  • Acrobat Reader 2017 for Windows and macOS Classic 2017 2017.011.30202
    https://www.adobe.com/devnet-docs/acrobatetk/tools/ReleaseNotesDC/index.html#id3

 

More Information:

  • https://helpx.adobe.com/security/products/acrobat/apsb21-55.html
  • https://www.hkcert.org/security-bulletin/adobe-monthly-security-update-september-2021
  • https://us-cert.cisa.gov/ncas/current-activity/2021/09/14/adobe-releases-security-updates-multiple-products
  • https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35982
  • https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39836 (to CVE-2021-39846)
  • https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39849 (to CVE-2021-39861)
  • https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39863


Tag: Adobe , Acrobat , Acrobat Reader , Adobe Reader
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