Sunday, April 14, 2024

Zoom Webcam Zero-Day Vulnerability Let Hackers Control 4+ Million Webcams Without Users Permission

A critical Zero-day vulnerability that affected Mac Zoom web client allows attackers to control nearly 4+ Million Webcams through the malicious website and enable the camera without permission.

Zoom provides remote conferencing services such as video conferencing, online meetings, chat, and mobile collaboration and it’s used by 750,000 companies for their business around the world.

The vulnerability resides in the Zoom, without users permission, attackers connect to a Zoom call with their video camera activated.

Apart from flaw, if you ever installed the Zoom Client in your Mac then you uninstalled it, still, you’re vulnerable since a localhost web server on your Mac that will help to an attacker to reinstalled the Zoom client automatically again without any sort of user interaction.

This vulnerability would also allow an attacker to perform DOS (Denial of Service) a Mac using any webpage by continuously initiating an invalid call during the meeting.

Vulnerability Leveraging the Zoom Web Feature

An attacker can trigger this vulnerability using simple Zoom feature by just send a meeting link to the targeted victims, once the victim opens the link in their browser, Zoom client is opened on their local machine.

According to security researcher Jonathan Leitschuh, This vulnerability was originally responsibly disclosed on March 26, 2019. This initial report included a proposed description of a ‘quick fix’ Zoom could have implemented by simply changing their server logic.

In order to fix this vulnerability, researcher advised removing the localhost web server solution.

“He also suggested the alternative solution by registering custom URI handlers (for example, a zoom:// URI handler) with the browsers is a more secure solution. When these URI handlers are triggered, the browser explicitly prompts the user for confirmation about opening the app.”

Zoom Released a Patch

Leitschuh he responsibly disclosed the vulnerability to Zoom in March and also giving the company 90 days to solve the problem. According to Leitschuh’s account, Zoom doesn’t appear to have done enough to resolve the issue.

Now Zoom fixed the issue by Remove the local web server entirely, once the Zoom client has been updated which means the use of a local web server on Mac devices has been stopped and the update has been pushed to all the Mac users.

Zoom Team Also Added the new option to the Zoom menu bar that will allow users to manually and completely uninstall the Zoom client, including the local web server.

Now, Mac users getting a new menu that prompt to “uninstall Zoom”, once the user clicks on it then the old version of Zoom will be completely removed.

You may see a pop-up in Zoom to update your client or download the newly patched version at

You can follow us on LinkedinTwitterFacebook for daily Cybersecurity updates also you can take the Best Cybersecurity course online to keep yourself updated.

Related Read

Hackers Use Linux Malware HiddenWasp to Attack Linux Systems for Gaining Remote Access

StealthWorker Brute-force Malware Attack on Windows & Linux Platform Via Hacked E-commerce Websites


Latest articles

Alert! Palo Alto RCE Zero-day Vulnerability Actively Exploited in the Wild

In a recent security bulletin, Palo Alto Networks disclosed a critical vulnerability in its...

6-year-old Lighttpd Flaw Impacts Intel And Lenovo Servers

The software supply chain is filled with various challenges, such as untracked security vulnerabilities...

Hackers Employ Deepfake Technology To Impersonate as LastPass CEO

A LastPass employee recently became the target of an attempted fraud involving sophisticated audio...

Sisence Data Breach, CISA Urges To Reset Login Credentials

In response to a recent data breach at Sisense, a provider of data analytics...

DuckDuckGo Launches Privacy Pro: 3-in-1 service With VPN

DuckDuckGo has launched Privacy Pro, a new subscription service that promises to enhance user...

Cyber Attack Surge by 28%:Education Sector at High Risk

In Q1 2024, Check Point Research (CPR) witnessed a notable increase in the average...

Midnight Blizzard’s Microsoft Corporate Email Hack Threatens Federal Agencies: CISA Warns

The Cybersecurity and Infrastructure Security Agency (CISA) has issued an emergency directive concerning a...
BALAJI is an Ex-Security Researcher (Threat Research Labs) at Comodo Cybersecurity. Editor-in-Chief & Co-Founder - Cyber Security News & GBHackers On Security.

Top 3 SME Attack Vectors

Securing the Top 3 SME Attack Vectors

Cybercriminals are laying siege to small-to-medium enterprises (SMEs) across sectors. 73% of SMEs know they were breached in 2023. The real rate could be closer to 100%.

  • Stolen credentials
  • Phishing
  • Exploitation of vulnerabilities

Related Articles