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AUSCERT External Security Bulletin Redistribution
ESB-2021.3082
APSB21-80 Security update available for Adobe Digital Editions
15 September 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Adobe Digital Editions
Publisher: Adobe
Operating System: Mac OS
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Increased Privileges -- Existing Account
Create Arbitrary Files -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-39828 CVE-2021-39827 CVE-2021-39826
Original Bulletin:
https://helpx.adobe.com/security/products/Digital-Editions/apsb21-80.html
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Security Updates Available for Adobe Digital Editions | APSB21-80
Bulletin ID Date Published Priority
APSB20-80 September 14, 2021 3
Summary
Adobe has released a security update for Adobe Digital Editions. This update
resolves one important and multiple critical vulnerabilities that could result
in arbitrary code execution.
Affected product versions
Product Version Platform
Adobe Digital Editions 4.5.11.187646 and below MacOS
Solution
Adobe categorizes these updates with the following priority ratings and
recommends users update their installation to the newest version:
Product Version Platform Priority Availability
Adobe Digital Editions 4.5.11.187658 MacOS 3 Download Page
Note:
o Customers can download the update from the Adobe Digital Editions download
page , or utilize the product's update mechanism when prompted.
Vulnerability details
Vulnerability Vulnerability CVSS
Category Impact Severity base CVSS vector CVE Numbers
score
Creation of
Temporary File in CVSS:3.1/AV:L
Directory with Privilege /AC:L/PR:H/
Incorrect Escalation Important 5.8 UI:R/S:U/C:H/ CVE-2021-39828
Permissions I:H/A:N
( CWE-379 )
Creation of
Temporary File in CVSS:3.1/AV:L
Directory with Arbitrary /AC:L/PR:N/
Incorrect file system Critical 7.8 UI:R/S:U/C:H/ CVE-2021-39827
Permissions write I:H/A:H
( CWE-379 )
OS Command Injection Arbitrary CVSS:3.1/AV:L
code Critical 8.6 /AC:L/PR:N/ CVE-2021-39826
( CWE-78 ) execution UI:R/S:C/C:H/
I:H/A:H
Acknowledgments
Adobe would like to thank the following security researchers for reporting
these issues and for working with Adobe to help protect our customers.
o CQY of Topsec Alpha Team (yjdfy) (CVE-2021-39828, CVE-2021-39827)
o CFF of Topsec Alpha Team (cff_123) (CVE-2021-39826)
For more information, visit https://helpx.adobe.com/security.html , or email
PSIRT@adobe.com
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