Adobe Security Bulletin

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Security Updates Available for Adobe Genuine Service | APSB21-81

Bulletin ID	Date Published	Priority
APSB21-81	September 14, 2020	3

Summary

Adobe has released updates for Adobe Genuine Service for Windows and macOS. This update resolves a critical vulnerability that could lead to privilege escalation in the context of the current user.     

Affected Versions

Product	Version	Platform
Adobe Genuine Service	7.3 and earlier versions	Windows and macOS

Märkus.

To verify the version of Adobe Genuine Service installed on your system, please follow the following steps: 

For Windows machines:

Navigate to C:\Program Files (x86)\Common Files\Adobe\AdobeGCClient 
Right click on AdobeGCClient.exe, select “Properties”. 
Go to “Details” tab, the File Version can be seen within.

For mac machines:

Navigate to /Library/Application Support/Adobe/AdobeGCClient/
Right click on AdobeGCClient, select Get Info. 
File Version can be seen corresponding version tag

Solution

Adobe categorizes these updates with the following priority ratings.

Product	Version	Platform	Priority Rating
Adobe Genuine Service	7.4	Windows and macOS	3

Märkus.

Adobe Genuine Integrity Service has a self-update mechanism that runs automatically at a regular interval when the host is connected to the internet. For more details regarding Adobe Genuine Integrity Service, please visit here.

Vulnerability details

Vulnerability Category	Vulnerability Impact	Severity	CVSS base score	CVSS vector	CVE Numbers
Creation of Temporary File in Directory with Incorrect Permissions (CWE-379)	Privilege Escalation	Critical	7.3	CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H	CVE-2021-40708

Acknowledgments

Adobe would like to thank CQY of Topsec Alpha Team (yjdfy) for reporting these issues and for working with Adobe to help protect our customers.  

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