What is CVE-2020-3440?

CVE-2020-3440 is a vulnerability in Cisco Webex Meetings Desktop App for Windows that allows an unauthenticated remote attacker to overwrite arbitrary files on an end-user system.

How does CVE-2020-3440 affect Cisco Webex Meetings Desktop App for Windows?

CVE-2020-3440 affects Cisco Webex Meetings Desktop App for Windows by allowing an unauthenticated remote attacker to overwrite arbitrary files on an end-user system.

What is the severity of CVE-2020-3440?

The severity of CVE-2020-3440 is medium with a CVSS score of 6.5.

How can an attacker exploit CVE-2020-3440?

An attacker can exploit CVE-2020-3440 by sending malicious URL parameters from a website to the affected application.

Is there a fix available for CVE-2020-3440?

Yes, Cisco has released a security advisory with mitigation measures for CVE-2020-3440. It is recommended to apply the necessary updates to address this vulnerability.

Vulnerability/
CVE-2020-3440

medium

6.5

CWE

26/8/2020

13/11/2024

CVE-2020-3440: Cisco Webex Meetings Desktop App for Windows Arbitrary File Overwrite Vulnerability

First published: Wed Aug 26 2020(Updated: )

A vulnerability in Cisco Webex Meetings Desktop App for Windows could allow an unauthenticated, remote attacker to overwrite arbitrary files on an end-user system. The vulnerability is due to improper validation of URL parameters that are sent from a website to the affected application. An attacker could exploit this vulnerability by persuading a user to follow a URL to a website that is designed to submit crafted input to the affected application. A successful exploit could allow the attacker to overwrite arbitrary files on the affected system, possibly corrupting or deleting critical system files.

Credit: ykramarz@cisco.com

Affected Software	Affected Version	How to fix
Cisco Webex Meetings	<40.8

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Reference Links

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

Frequently Asked Questions

What is CVE-2020-3440?
CVE-2020-3440 is a vulnerability in Cisco Webex Meetings Desktop App for Windows that allows an unauthenticated remote attacker to overwrite arbitrary files on an end-user system.
How does CVE-2020-3440 affect Cisco Webex Meetings Desktop App for Windows?
CVE-2020-3440 affects Cisco Webex Meetings Desktop App for Windows by allowing an unauthenticated remote attacker to overwrite arbitrary files on an end-user system.
What is the severity of CVE-2020-3440?
The severity of CVE-2020-3440 is medium with a CVSS score of 6.5.
How can an attacker exploit CVE-2020-3440?
An attacker can exploit CVE-2020-3440 by sending malicious URL parameters from a website to the affected application.
Is there a fix available for CVE-2020-3440?
Yes, Cisco has released a security advisory with mitigation measures for CVE-2020-3440. It is recommended to apply the necessary updates to address this vulnerability.

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