Arbitrary file overwrite in Cisco Webex Meetings Desktop App for Windows

1) Input validation error

EUVDB-ID: #VU45795

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 - Improper input validation

Exploit availability: No

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

External links

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

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.