Adobe Security Bulletin

Security Update Available for Adobe InCopy | APSB21-71

Bulletin ID

Date Published

Priority

APSB21-71

September 14, 2021

3

Summary

Adobe has released a security update for Adobe InCopy.  This update addresses multiple critical vulnerabilities. Successful exploitation could lead to arbitrary code execution in the context of the current user.                              

Affected versions

Product

Affected version

Platform

Adobe InCopy  

16.3.1 and earlier version

macOS

Adobe InCopy  

16.3 and earlier version

Windows 

Solution

Adobe categorizes these updates with the following priority rating and recommends users update their software installations via the Creative Cloud desktop app updater, or by navigating to the InCopy Help menu and clicking "Updates." For more information, please reference this help page.

Product

Updated version

Platform

Priority rating

Availability

Adobe InCopy   

16.4

Windows  and macOS  

3

For managed environments, IT administrators can use the Creative Cloud Packager to create deployment packages. Refer to this help page for more information.

Vulnerability Details

Vulnerability Category

Vulnerability Impact

Severity

CVSS base score 

CVE Number

Access of Memory Location After End of Buffer

(CWE-788)

Arbitrary file system write

Critical 

8.8

CVSS3.1:/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVE-2021-39819

Access of Memory Location After End of Buffer

(CWE-788)

Arbitrary code execution

Critical 

7.8

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVE-2021-39818

Acknowledgments

Adobe would like to thank the following researchers for reporting this issue and for working with Adobe to help protect our customers.  

  • CQY of Topsec Alpha Team (yjdfy) (CVE-2021-39818)
  • Trung Tính Phạm (CVE-2021-39819)
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