CVE-2019-1928 : Security Advisory and Response

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

Understanding CVE-2019-1928

Multiple security weaknesses in Cisco Webex Network Recording Player and Cisco Webex Player for Microsoft Windows could allow attackers to run unauthorized commands on compromised systems.

What is CVE-2019-1928?

The vulnerabilities stem from inadequate validation of Advanced Recording Format (ARF) and Webex Recording Format (WRF) files in the affected software. Attackers could exploit these weaknesses by sending harmful ARF or WRF files to users, tricking them into opening the files with the vulnerable software, potentially leading to arbitrary code execution.

The Impact of CVE-2019-1928

CVSS Base Score: 7.8 (High Severity)
Attack Vector: Local
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Confidentiality, Integrity, and Availability Impact: High

Technical Details of CVE-2019-1928

Vulnerability Description

The vulnerabilities in Cisco Webex Network Recording Player and Cisco Webex Player for Microsoft Windows allow attackers to execute arbitrary code due to improper validation of ARF and WRF files.

Affected Systems and Versions

Product: Cisco WebEx WRF Player
Vendor: Cisco
Affected Versions: Less than 39.5.5 (Custom Version)

Exploitation Mechanism

Attackers can exploit the vulnerabilities by sending malicious ARF or WRF files via links or email attachments, persuading users to open them with the vulnerable software, enabling arbitrary code execution.

Mitigation and Prevention

Immediate Steps to Take

Update the affected software to a patched version.
Avoid opening ARF or WRF files from untrusted sources.
Implement email and web filtering to block malicious attachments and links.

Long-Term Security Practices

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

Patching and Updates

Apply the latest security patches provided by Cisco to address the vulnerabilities in Cisco Webex Network Recording Player and Cisco Webex Player.