CVE-2023-34115 : What You Need to Know

A buffer copy vulnerability without checking the size of the input has been identified in Zoom Meeting SDK before version 5.13.0. This vulnerability could allow an authenticated user to trigger a denial of service attack via local access.

Understanding CVE-2023-34115

This section covers the essential details and impact of the CVE-2023-34115 vulnerability.

What is CVE-2023-34115?

The CVE-2023-34115 vulnerability involves a buffer copy operation in the Zoom Meeting SDK prior to version 5.13.0. Due to a lack of input size validation, an authenticated user could exploit this flaw to potentially crash the SDK, necessitating a system restart.

The Impact of CVE-2023-34115

The impact of this vulnerability is rated as medium severity. An attacker could use this vulnerability to disrupt the availability of the Zoom Meeting SDK, leading to a denial of service condition and requiring the SDK to be restarted manually.

Technical Details of CVE-2023-34115

This section delves into the technical aspects of the vulnerability, affected systems, and how it can be exploited.

Vulnerability Description

The vulnerability stems from a buffer copy operation that does not validate input size in Zoom Meeting SDK versions preceding 5.13.0. This oversight could be leveraged by an authenticated user to crash the SDK, potentially leading to a denial of service scenario.

Affected Systems and Versions

The affected product is the Zoom Meeting SDK, specifically versions before 5.13.0. Users relying on these versions are susceptible to the described denial of service risk.

Exploitation Mechanism

To exploit this vulnerability, an authenticated user needs local access to the system. By sending crafted input data to the vulnerable buffer, an attacker can cause it to overflow, resulting in a crash and subsequent service disruption.

Mitigation and Prevention

This section outlines the steps to mitigate the risk posed by CVE-2023-34115 and prevent potential exploitation.

Immediate Steps to Take

Users of the affected versions should update to Zoom Meeting SDK version 5.13.0 or later. Additionally, restricting access to the vulnerable component can reduce the likelihood of exploitation.

Long-Term Security Practices

Maintaining up-to-date software versions, implementing secure coding practices, and conducting regular security assessments can help prevent buffer overflow vulnerabilities like CVE-2023-34115.

Patching and Updates

Zoom Video Communications, Inc. has released a security bulletin addressing this vulnerability, providing users with guidance on applying patches and securing their systems.