CVE-2020-3471 Explained : Impact and Mitigation
Learn about CVE-2020-3471, a vulnerability in Cisco Webex Meetings allowing attackers to maintain audio connections despite expulsion. Find mitigation steps here.
A vulnerability in Cisco Webex Meetings and Cisco Webex Meetings Server could allow an unauthenticated, remote attacker to maintain bidirectional audio despite being expelled from an active Webex session.
Understanding CVE-2020-3471
This CVE involves an unauthorized audio information exposure vulnerability in Cisco Webex Meetings and Cisco Webex Meetings Server.
What is CVE-2020-3471?
The vulnerability allows an attacker to sustain bidirectional audio in a Webex session even after being expelled, due to a synchronization issue between meeting and media services on a vulnerable Webex site.
The Impact of CVE-2020-3471
- CVSS Base Score: 6.5 (Medium Severity)
- Confidentiality Impact: High
- Attack Vector: Network
- User Interaction: Required
- Exploit: An attacker could exploit this vulnerability by sending crafted requests to a vulnerable Cisco Webex Meetings or Cisco Webex Meetings Server site.
Technical Details of CVE-2020-3471
This section provides more in-depth technical insights into the vulnerability.
Vulnerability Description
The vulnerability arises from a synchronization issue between meeting and media services, enabling an attacker to maintain audio connections despite being expelled.
Affected Systems and Versions
- Affected Product: Cisco WebEx Meetings Server
- Vendor: Cisco
- Affected Version: Not Applicable
Exploitation Mechanism
- The attacker can exploit the vulnerability by sending specially crafted requests to the vulnerable Webex site.
Mitigation and Prevention
Protecting systems from CVE-2020-3471 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply patches and updates provided by Cisco promptly.
- Monitor Cisco's security advisories for any further updates.
Long-Term Security Practices
- Regularly update and patch all software and systems.
- Implement network segmentation and access controls to limit exposure.
- Educate users on identifying and reporting suspicious activities.
Patching and Updates
- Cisco has released patches to address this vulnerability. Ensure timely installation of these patches to mitigate the risk.