CVE-2021-1503 : Security Advisory and Response

A vulnerability in Cisco Webex Network Recording Player for Windows and MacOS and Cisco Webex Player for Windows and MacOS could allow an attacker to execute arbitrary code on an affected system.

Understanding CVE-2021-1503

This CVE refers to a memory corruption vulnerability in Cisco Webex Network Recording Player and Webex Player that could lead to arbitrary code execution on the affected system.

What is CVE-2021-1503?

The vulnerability in Cisco Webex Network Recording Player and Webex Player allows attackers to exploit insufficient validation of values in Webex recording files to execute malicious code on the targeted system.

The Impact of CVE-2021-1503

With a CVSS base score of 7.8, this vulnerability has a high severity level with a significant impact on confidentiality, integrity, and availability. An attacker can execute arbitrary code with the privileges of the targeted user.

Technical Details of CVE-2021-1503

This section provides more detailed technical insights into the vulnerability.

Vulnerability Description

The vulnerability arises due to insufficient validation of values in Webex recording files (ARF or WRF), allowing attackers to send malicious files to users and execute arbitrary code on their systems.

Affected Systems and Versions

Cisco Webex Network Recording Player and Webex Player for Windows and MacOS are affected by this vulnerability.

Exploitation Mechanism

Attackers can send malicious ARF or WRF files to users through links or email attachments to exploit this vulnerability.

Mitigation and Prevention

To address CVE-2021-1503, the following steps can be taken:

Immediate Steps to Take

Users should be cautious while opening files from untrusted sources and apply official patches from Cisco.

Long-Term Security Practices

Implement proper email and web security protocols to prevent phishing attacks and regularly update security software.

Patching and Updates

Ensure that Cisco Webex Network Recording Player and Webex Player are updated with the latest security patches to mitigate the vulnerability.