Vulnerability identifier: #VU24661

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-3142

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco Webex Meetings Suite
Client/Desktop applications / Other client software
Cisco Webex Meetings Online
Server applications / Conferencing, Collaboration and VoIP solutions

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to unintended meeting information exposure in a specific meeting join flow for mobile applications. A remote attacker can join the password-protected meeting without providing the meeting password.

This vulnerability can be exploited by accessing a known meeting ID or meeting URL from the mobile device’s web browser. The browser will then request to launch the device’s Webex mobile application. The unauthorized attendee will be visible in the attendee list of the meeting as a mobile attendee.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco Webex Meetings Suite: All versions

Cisco Webex Meetings Online: All versions

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200124-webex-unauthjoin

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.