#VU53760 Protection Mechanism Failure in Cisco WebEx Meetings Server and Cisco Webex Meetings - CVE-2021-1517

Vulnerability identifier: #VU53760

Vulnerability risk: Medium

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-1517

CWE-ID: CWE-693

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco WebEx Meetings Server
Server applications / Conferencing, Collaboration and VoIP solutions
Cisco Webex Meetings
Server applications / Conferencing, Collaboration and VoIP solutions

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to unsafe handling of shared content within the multimedia viewer feature. A remote authenticated attacker can bypass security protections and prevent warning dialogs from appearing before files are offered to other users.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco WebEx Meetings Server: before 3.0

Cisco Webex Meetings: before 3.0

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External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-multimedia-26DpqVRO

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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