CVE-2020-3319 : Exploit Details and Defense Strategies

A vulnerability in Cisco Webex Network Recording Player and Cisco Webex Player for Microsoft Windows could allow an attacker to cause a process crash resulting in a Denial of Service (DoS) condition for the player application on an affected system.

Understanding CVE-2020-3319

This CVE involves a vulnerability in Cisco Webex Network Recording Player and Cisco Webex Player for Microsoft Windows that could lead to a Denial of Service (DoS) attack.

What is CVE-2020-3319?

The vulnerability stems from insufficient validation of certain elements within Webex recordings stored in the Advanced Recording Format (ARF) or the Webex Recording Format (WRF). An attacker could exploit this by sending a user a malicious ARF or WRF file, causing the Webex player application to crash when attempting to view the file.

The Impact of CVE-2020-3319

CVSS Base Score: 3.3 (Low)
Attack Vector: Local
Attack Complexity: Low
User Interaction: Required
Availability Impact: Low
Scope: Unchanged
No Confidentiality or Integrity Impact
The vulnerability could lead to a DoS condition on the affected system.

Technical Details of CVE-2020-3319

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability allows an attacker to crash the Webex player application by exploiting insufficient validation of elements in Webex recordings.

Affected Systems and Versions

Affected Products:
Cisco Webex Network Recording Player
Cisco Webex Player for Microsoft Windows
Vulnerable Versions:
Cisco Webex Network Recording Player versions earlier than Release 3.0 MR3 Security Patch 2
Cisco Webex Player for Microsoft Windows versions earlier than Release 4.0 MR3

Exploitation Mechanism

An attacker can exploit this vulnerability by sending a malicious ARF or WRF file to a user and convincing them to open it with the affected software on their local system.

Mitigation and Prevention

Protecting systems from CVE-2020-3319 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update affected software to versions 3.0 MR3 Security Patch 2 and 4.0 MR3 or later.
Avoid opening ARF or WRF files from untrusted sources.

Long-Term Security Practices

Regularly update software and apply security patches.
Educate users on safe file handling practices.

Patching and Updates

Ensure timely installation of security patches and updates to mitigate the risk of exploitation.