CVE-2019-1773 : Security Advisory and Response

Cisco Webex Network Recording Player Arbitrary Code Execution Vulnerabilities

Understanding CVE-2019-1773

This CVE involves a security flaw in the Microsoft Windows versions of the Cisco Webex Network Recording Player and the Cisco Webex Player, potentially allowing unauthorized command execution on compromised systems.

What is CVE-2019-1773?

The vulnerability stems from inadequate verification of Advanced Recording Format (ARF) and Webex Recording Format (WRF) files within the affected software. Attackers can exploit this by sending harmful files through links or email attachments, tricking users into opening them with the vulnerable software.

The Impact of CVE-2019-1773

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-2019-1773

This section delves into the specifics of the vulnerability.

Vulnerability Description

The flaw allows attackers to execute arbitrary code on affected systems by exploiting the improper validation of ARF and WRF files.

Affected Systems and Versions

Product: Cisco WebEx WRF Player
Vendor: Cisco
Affected Versions: Less than 39.2.205 (unspecified version type)

Exploitation Mechanism

Attackers can send malicious ARF or WRF files via links or email attachments to persuade users into opening them with the vulnerable software, granting the attacker the ability to run arbitrary commands.

Mitigation and Prevention

Protecting systems from this vulnerability requires immediate actions and long-term security practices.

Immediate Steps to Take

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

Long-Term Security Practices

Regularly update software and security patches.
Educate users on safe email and file handling practices.
Employ network segmentation to limit the impact of potential breaches.

Patching and Updates

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