CVE-2020-3127 : Vulnerability Insights and Analysis

Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code Execution Vulnerabilities

Understanding CVE-2020-3127

Multiple vulnerabilities in Cisco Webex Network Recording Player for Microsoft Windows and Cisco Webex Player for Microsoft Windows could allow an attacker to execute arbitrary code on an affected system.

What is CVE-2020-3127?

The vulnerabilities in Cisco Webex Network Recording Player and Cisco Webex Player for Microsoft Windows stem from insufficient validation of certain elements within a Webex recording stored in the Advanced Recording Format (ARF) or the Webex Recording Format (WRF). Attackers can exploit these vulnerabilities by tricking users into opening a malicious ARF or WRF file.

The Impact of CVE-2020-3127

If successfully exploited, attackers can execute arbitrary code on the affected system with the privileges of the targeted user. The vulnerabilities have a CVSS base score of 7.8, indicating a high severity level.

Technical Details of CVE-2020-3127

Vulnerability Description

The vulnerabilities allow for arbitrary code execution due to insufficient validation of elements within Webex recordings.

Affected Systems and Versions

Product: Cisco WebEx WRF Player
Vendor: Cisco
Versions: Unspecified

Exploitation Mechanism

Attackers can exploit these vulnerabilities by sending a malicious ARF or WRF file to a user through a link or email attachment, persuading the user to open the file on the local system.

Mitigation and Prevention

Immediate Steps to Take

Avoid opening ARF or WRF files from untrusted sources.
Apply security patches provided by Cisco promptly.

Long-Term Security Practices

Educate users on safe file handling practices.
Implement email filtering to detect and block malicious attachments.

Patching and Updates

Ensure that the affected systems are updated with the latest security patches from Cisco.