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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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