Bulletin ID
Security Updates Available for Adobe Digital Editions | APSB21-80
|  | Date Published | Priority | 
|---|---|---|
| APSB20-80 | September 14, 2021    | 3 | 
Summary
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 | 
- Customers can download the update from the Adobe Digital Editions download page, or utilize the product’s update mechanism when prompted.
Vulnerability details
| Vulnerability Category | Vulnerability Impact | Severity | CVSS base score   | CVE Numbers | |
|---|---|---|---|---|---|
| Creation of Temporary File in Directory with Incorrect Permissions (CWE-379) | Privilege Escalation  | Important | 5.8 | CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N | CVE-2021-39828 | 
| Creation of Temporary File in Directory with Incorrect Permissions (CWE-379) | Arbitrary file system write | Critical | 6.5 | CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H | CVE-2021-39827 | 
| OS Command Injection (CWE-78) | Arbitrary code execution | Critical | 8.6 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H | CVE-2021-39826 | 
Acknowledgments
Adobe would like to thank the following security researchers for reporting these issues and for working with Adobe to help protect our customers.
- CQY of Topsec Alpha Team (yjdfy) (CVE-2021-39828, CVE-2021-39827)
- CFF of Topsec Alpha Team (cff_123) (CVE-2021-39826)
Revisions
October 4, 2021: Updated CVSS base score and vector for CVE-2021-39827.
For more information, visit https://helpx.adobe.com/security.html, or email PSIRT@adobe.com