Guest

Preview Tool

Cisco Bug: CSCvs24436 - Cisco Webex Meetings Multimedia Sharing Feature Security Bypass Vulnerability

Last Modified

Apr 20, 2020

Products (1)

  • Cisco Webex Meetings Server

Known Affected Releases

T39.3

Description (partial)

Symptom:
A vulnerability within the Multimedia Viewer feature of Cisco Webex Meetings could allow an authenticated, remote attacker to bypass security protections.

The vulnerability is due to missing security warning dialog boxes when a room host views shared multimedia files. An authenticated, remote attacker could exploit this vulnerability by using the host role to share files within the Multimedia sharing feature and convincing a former room host to view that file. A warning dialog normally appears cautioning users before the file is displayed; however, the former host would not see that warning dialog, and any shared multimedia would be rendered within the user's browser. The attacker could leverage this behavior to conduct additional attacks by including malicious files within a targeted room host's browser window.

Conditions:
At the time of release, this issue was corrected in Cisco Webex Meeting Server 3.0MR3 Security Patch 2 and 4.0MR3.
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.