CVE-2024-20396: 
Cisco Webex Teams vulnerability analysis and mitigation

A vulnerability in the protocol handlers of Cisco Webex App has been identified (CVE-2024-20396), discovered and disclosed in July 2024. The vulnerability affects the Cisco Webex App's protocol handler functionality, specifically impacting how the application handles file protocol handlers. This security flaw could potentially expose sensitive information to unauthorized remote attackers (Cisco Advisory).

The vulnerability stems from the application's improper handling of file protocol handlers. It has been assigned a CVSS v3.1 Base Score of 5.3 (Medium) with the vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N. The vulnerability is classified under CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) (Cisco Advisory).

If successfully exploited, the vulnerability could allow an attacker to capture sensitive information, including credential information, from the requests. This is particularly concerning if the attacker is in a privileged network position where they can observe transmitted traffic (Cisco Advisory).

The vulnerability can be exploited by an unauthenticated, remote attacker by persuading a user to follow a specially crafted link designed to cause the application to send requests. The attacker must be in a privileged network position to observe the transmitted traffic for successful exploitation (Cisco Advisory).

Cisco has released software updates that address this vulnerability. The updates are delivered through the Cisco Webex service, and no customer action is necessary to receive these software updates. There are no workarounds available for this vulnerability (Cisco Advisory).