Vulnerability identifier: #VU45795

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-3440

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco Webex Meetings Desktop App
Client/Desktop applications / Other client software

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to overwrite critical files on the system.

The vulnerability exists due to insufficient validation of URL parameters when handling external links within the application. A remote attacker can trick the victim to follow a specially crafted link that ones opened with Cisco Webex Meetings Desktop App for Windows may allows an attacker to overwrite arbitrary files on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco Webex Meetings Desktop App: 33.6.0 - 40.6

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-desktop-app-OVSfpVMj

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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.