CVE-2020-3321 Explained : Impact and Mitigation
Learn about CVE-2020-3321, 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. Find out the impact, affected systems, and mitigation steps.
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-2020-3321
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-2020-3321?
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-2020-3321
- CVSS Base Score: 3.3 (Low)
- Attack Vector: Local
- Attack Complexity: Low
- User Interaction: Required
- Availability Impact: Low
- No Confidentiality or Integrity Impact
Technical Details of CVE-2020-3321
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
- Cisco Webex Network Recording Player: Versions less than 3.0 MR3 Security Patch 2 and less than 4.0 MR3
- Cisco Webex Player for Microsoft Windows: Versions less than 3.0 MR3 Security Patch 2 and less than 4.0 MR3
Exploitation Mechanism
An attacker can exploit this vulnerability by tricking a user into opening a malicious ARF or WRF file using the affected software on the local system.
Mitigation and Prevention
Protecting systems from CVE-2020-3321 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update the affected software to the latest patched version.
- Avoid opening ARF or WRF files from untrusted sources.
Long-Term Security Practices
- Educate users on safe file handling practices.
- Implement email and web filtering to block malicious files.
Patching and Updates
Regularly check for security updates and apply patches promptly to mitigate the vulnerability.