CVE-2021-34419 : Exploit Details and Defense Strategies

In November 2021, a CVE-2021-34419 was published regarding an HTML injection vulnerability in the Zoom Client for Meetings for Ubuntu Linux, affecting versions prior to 5.1.0. This flaw could be exploited during in-meeting screen sharing, potentially leading to social engineering attacks.

Understanding CVE-2021-34419

This section provides insights into the nature of the vulnerability and its impact.

What is CVE-2021-34419?

The vulnerability identified as CVE-2021-34419 exists in the Zoom Client for Meetings for Ubuntu Linux versions before 5.1.0. It involves an HTML injection flaw that arises when a remote control request is sent to a user engaged in in-meeting screen sharing. This security issue could be leveraged by malicious actors to target meeting participants for social engineering attacks.

The Impact of CVE-2021-34419

With a CVSS base score of 3.7 (Low severity), the vulnerability's impact is considered low. However, the potential consequences include the manipulation of meeting participants through social engineering tactics, posing a risk to user privacy and security.

Technical Details of CVE-2021-34419

Delve deeper into the technical aspects of CVE-2021-34419, including the vulnerability description, affected systems and versions, and exploitation mechanism.

Vulnerability Description

The vulnerability involves an HTML injection flaw in the Zoom Client for Meetings for Ubuntu Linux prior to version 5.1.0. Specifically, the flaw occurs when sending a remote control request to a user during in-meeting screen sharing.

Affected Systems and Versions

The impacted product is the 'Zoom Client for Meetings for Ubuntu Linux' by Zoom Video Communications Inc, with versions less than 5.1.0 being vulnerable to the HTML injection flaw.

Exploitation Mechanism

The exploitation of CVE-2021-34419 involves manipulating the HTML injection vulnerability to send deceptive remote control requests to users engaged in in-meeting screen sharing, leading to potential social engineering attacks.

Mitigation and Prevention

Explore strategies to mitigate the risks associated with CVE-2021-34419 and prevent exploitation.

Immediate Steps to Take

Users are advised to update their Zoom Client for Meetings for Ubuntu Linux to version 5.1.0 or higher to remediate the HTML injection vulnerability and enhance security.

Long-Term Security Practices

Practicing vigilance during screen sharing sessions and remaining cautious of unexpected remote control requests can help prevent falling victim to social engineering attacks.

Patching and Updates

Regularly checking for and applying security patches and updates from Zoom Video Communications Inc is crucial to staying protected from known vulnerabilities.