Operating System:

[Win][Mac]

Published:

15 September 2021

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.3090
           APSB21-71 Security update available for Adobe InCopy
                             15 September 2021

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Adobe InCopy
Publisher:         Adobe
Operating System:  Windows
                   Mac OS
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account            
                   Create Arbitrary Files          -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-39819 CVE-2021-39818 

Original Bulletin: 
   https://helpx.adobe.com/security/products/incopy/apsb21-71.html

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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                Release Note


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   Vulnerability          CVSS
    Category         Impact     Severity base     CVSS vector      CVE Number
                                         score

Access of Memory
Location After    Arbitrary                    CVSS3.1:/AV:N/
End of Buffer     file system   Critical 8.8   AC:L/PR:N/UI:R/   CVE-2021-39819
                  write                        S:U/C:H/I:H/A:H
( CWE-788 )

Access of Memory
Location After    Arbitrary                    CVSS:3.1/AV:L/
End of Buffer     code          Critical 7.8   AC:L/PR:N/UI:R/   CVE-2021-39818
                  execution                    S:U/C:H/I:H/A:H
( CWE-788 )


Acknowledgments

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

  o CQY of Topsec Alpha Team (yjdfy) (CVE-2021-39818)
  o Trung Tinh Pham (CVE-2021-39819)

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