Thursday, July 18, 2024
EHA

Hacking Zoom – Researchers Discovered Multiple Security Vulnerabilities in Zoom

Zoom is the popular video conferencing app that grew rapidly and it has more than 200M by the mid-2020. The popularity of the app made it a prime target for hackers.

Security researcher Mazin Ahmed, who presented his findings at DEFCON 2020 and disclosed the vulnerabilities to Zoom. All the vulnerabilities fixed with version 5.2.4.

Vulnerabilities Disclosed

Ahmed discovered the vulnerability with Zoom Launcher for Linux that could allow an attacker to run any unauthorized software in the way it launches the “zoom” executable.

He used a vulnerability intelligence platform FullHunt.io to query the domains associated with Zoom. Here is the list of vulnerabilities;

  • Zoom Exposed Public Kerberos Authentication Server
  • Memory Leak on Zoom Production Server
  • Unexploitable RCE on Zoom Production Server
  • Shadow IT Issues on accessible Zoom servers

Flaws With Zoom App for Linux:

  • Bad Design Practise on TLS/SSL implementation
  • A Really Bad Design Practice on Zoom Launcher Implementation.
  • End-to-End encrypted messages between Zoom users are stored on-disk in plain-text.
  • Zoom Local Database accessible by all local users, including private end-to-end encrypted messages (stored in plain-text), and access tokens.

During the analysis, he observed a Kerberos service has been exposed by Zoom that provides a wider attack surface to enumerate the Login Credentials.

Another vulnerability is with the image conversion on Zoom which converts the GIF to PNG, for image conversion Zoom uses ImageMagick version that has a memory leak vulnerability. The memory leak vulnerability occurs because of the uninitialization of the memory space on the GIF parser of ImageMagick.

He also published a POC video, exploiting the leak;

Ahmed found that “Zoom TLS/SSL is Broken By Design on Linux, here wrote a PoC that injects TLS/SSL certificate fingerprints into the local Zoom database. Once this code is executed on a user machine, all injected certificates will be accepted without errors on Zoom.”

He also added that Zoom is not fully End-to-End Encrypted.

Zoom released an update on August 3rd, 2020, in the update with the Zoom version 5.2.4 all the security vulnerabilities has been fixed.

Other Zoom Flaws

A New Zoom URL Flaw Let Hackers Mimic Organization’s Invitation Link

Zoom 0day Vulnerability Let Remote Attacker to Execute Arbitrary Code on Victim’s Computer

New Zoom Flaw Let Attackers to Hack into the Systems of Participants via Chat Messages

You can follow us on LinkedinTwitterFacebook for daily Cybersecurity, and hacking news updates.

Website

Latest articles

Octo Tempest Know for Attacking VMWare ESXi Servers Added RansomHub & Qilin to Its Arsenal

Threat actors often attack VMware ESXi servers since they accommodate many virtual machines, which...

TAG-100 Actors Using Open-Source Tools To Attack Gov & Private Orgs

Hackers exploit open-source tools to execute attacks because they are readily available, well-documented, and...

macOS Users Beware Of Weaponized Meeting App From North Korean Hackers

Meeting apps are often targeted and turned into weapons by hackers as they are...

Hackers Exploiting Legitimate RMM Tools With BugSleep Malware

Since October 2023, MuddyWater, which is an Iranian threat group linked to MOIS, has...

Cybercriminals Exploit Attack on Donald Trump for Crypto Scams

Researchers at Bitdefender Labs remain ever-vigilant, informing users about the latest scams and internet...

New TE.0 HTTP Request Smuggling Flaw Impacts Google Cloud Websites

HTTP Request Smuggling is a flaw in web security that is derived from variations...

Volcano Demon Group Attacking Organizations With LukaLocker Ransomware

The Volcano Demon group has been discovered spreading a new ransomware called LukaLocker, which...
Guru baran
Guru baranhttps://gbhackers.com
Gurubaran is a co-founder of Cyber Security News and GBHackers On Security. He has 10+ years of experience as a Security Consultant, Editor, and Analyst in cybersecurity, technology, and communications.

Free Webinar

Low Rate DDoS Attack

9 of 10 sites on the AppTrana network have faced a DDoS attack in the last 30 days.
Some DDoS attacks could readily be blocked by rate-limiting, IP reputation checks and other basic mitigation methods.
More than 50% of the DDoS attacks are employing botnets to send slow DDoS attacks where millions of IPs are being employed to send one or two requests per minute..
Key takeaways include:

  • The mechanics of a low-DDoS attack
  • Fundamentals of behavioural AI and rate-limiting
  • Surgical mitigation actions to minimize false positives
  • Role of managed services in DDoS monitoring

Related Articles