Cisco Webex Meetings

A vulnerability with Cisco Webex Meetings Desktop App for Windows allows an authenticated local attacker to gain access for sensitive information on a vulnerable system.

The vulnerability can be tracked as CVE-2020-3347 and it is due to unsafe usage of shared memory used by the application.

According to Trustwave SpiderLabs Security who discovered the vulnerability, if a user configured the client to log in automatically, then the client has several memory-mapped files that are not protected from reading or writing.

“Malicious users can open and dump the contents of this file if they can logon to the machine. Simply put, another user can loop over sessions and try to open, read, and save interesting content for future inspection.”

The vulnerability can be exploited by an attacker who has access to the system memory, by running the application on the local system.

Successful exploitation of the vulnerability allows attackers to retrieve sensitive information from the shared memory, including usernames, meeting information, or authentication tokens that could aid the attacker in future attacks.

Cisco Webex Meetings Desktop App for Windows releases earlier than 40.6.0 are affected with the vulnerability, now Cisco released patches, users are recommended to apply the updates.

“When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page, to determine exposure and a complete upgrade solution.”

The Cisco Product Security Incident Response Team stated that “they not aware of any malicious use of the vulnerability that is described in this advisory.”

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