What We Do
How we do it
Resources
SECURITY ADVISORIES
May 11, 2022
CVE-2022-26923 - Active Directory Domain Services Elevation of Privilege Vulnerability
THE THREAT Microsoft has disclosed a new vulnerability impacting Active Directory Certificate Services (ADCS) tracked as CVE-2022-26923 (Active Directory Domain Services Elevation of Privilege Vulnerability). If exploited successfully, an authenticated attacker can escalate privileges in environments where ADCS is running on the domain. eSentire is aware of technical details and tooling [2] for…
Read More
View all Advisories →
Company
ABOUT ESENTIRE
About Us
eSentire is The Authority in Managed Detection and Response Services, protecting the critical data and applications of 1200+ organizations in 75+ countries from known and unknown cyber threats. Founded in 2001, the company’s mission is to hunt, investigate and stop cyber threats before they become business disrupting events.
Read about how we got here
Leadership Work at eSentire
LATEST PRESS RELEASE
May 17, 2022
Cybersecurity Leader eSentire Continues Its Commitment to Rigorous Security Standards Earning PCI DSS Certification
Waterloo, ON, May 17, 2022 — eSentire, the Authority in Managed Detection and Response (MDR), maintains one of the most secure and robust IT environments of any MDR provider in the industry. To that end, eSentire today announced that it has received the Payment Card Industry Data Security Standard (PCI DSS) certification, considered one of the most stringent and comprehensive payment card…
Read More
Partners
PARTNER PROGRAM
e3 Ecosystem
We provide sophisticated cybersecurity solutions for Managed Security Service Providers (MSSPs), Managed Service Providers (MSPs), and Value-Added Resellers (VARs). Find out why you should partner with eSentire, the Authority in Managed Detection and Response, today.
Learn more
ECOSYSTEM PARTNER RESOURCES
Apply to become an e3 ecosystem partner with eSentire, the Authority in Managed Detection and Response.
Login to the Partner Portal for resources and content for current partners.
Search
Resources
Security advisories — Apr 02, 2020

Zoom Security Issues

Speak With A Security Expert Now

THE THREAT

The Zoom video conferencing platform has come under increased scrutiny due to the widespread organizational move to remote work. Security researchers have discovered multiple vulnerabilities in the platform’s software [1] and threat actors actively targeting Zoom meetings [2]. Organizations using Zoom should ensure that stringent security settings are applied to all meetings. 

What we’re doing about it

What you should do about it

Additional information

Zoom Vulnerabilities:

A security researcher identified an unpatched UNC path injection vulnerability in Zoom's chat application [5]. The vulnerability can be exploited to steal hashed passwords or cause local code execution. This vulnerability is ranked as a medium criticality as the attacker would need to gain access to a Zoom chat prior to launching the attack.  In order to exploit the vulnerability, an attacker would need to send a UNC link via Zoom's chat feature and convince the end user to click the link. This security issue was fixed by Zoom on April 1st, 2020. 

On March 30th, 2020, a security researcher released two unpatched vulnerabilities affecting Zoom’s macOS client [6]. The vulnerabilities can be exploited to cause privilege escalation and code injection for microphone and camera access. Zoom has announced that these issues were fixed as of April 1st, 2020. The criticality of these vulnerabilities is low as in order to exploit these vulnerabilities a threat actor would to have previously compromised the target machine. 

There have been widespread reports of ZoomBombing, where an uninvited individual gains access to a Zoom meeting and either disrupts the meeting or listens for privileged information. ZoomBombing is not the result of a direct vulnerability but is rather due to the 9-11 character Zoom meeting IDs. These IDs can be easily guessed, allowing threat actors and pranksters to identify open meetings. The inclusion of meeting passwords prevents ZoomBombing.

Zoom Encryption:

Zoom has historically claimed to offer end to end encryption for video meetings. This claim was inaccurate, as Zoom supports transport encryption rather than end to end encryption [7]. Despite the misleading claim, any risks posed by not having end to end encryption is minimal at best.  Zoom has released an article to explain the current encryption offered in their service [8].  

Zoom Privacy:

Privacy concerns have been raised relating to Zoom due to the platform’s previous privacy statement. The former privacy policy would have allowed Zoom to collect large amounts of user data including meeting transcripts [9]. On March 29th, 2020, Zoom updated its privacy policy to clearly state that user data would not be collected and resold [10]. 

Zoom has flaws but offers significant value as an easy to use video conferencing software. The company has released a public explanation and apology to customers which includes a list of actions taken and future plans for security [11].

References:

[1] https://techcrunch.com/2020/04/01/zoom-doom/

[2] https://krebsonsecurity.com/2020/04/war-dialing-tool-exposes-zooms-password-problems/

[3] https://support.zoom.us/hc/en-us/articles/360038247071-Setting-up-and-using-two-factor-authentication

[4] https://zoom.us/docs/doc/Zoom-Security-White-Paper.pdf

[5] https://www.bleepingcomputer.com/news/security/zoom-lets-attackers-steal-windows-credentials-run-programs-via-unc-links/

[6] https://objective-see.com/blog/blog_0x56.html

[7] https://theintercept.com/2020/03/31/zoom-meeting-encryption/

[8] https://blog.zoom.us/wordpress/2020/04/01/facts-around-zoom-encryption-for-meetings-webinars/

[9] https://www.securityweek.com/zoom-updates-privacy-policy-after-experts-raise-concerns

[10] https://zoom.us/privacy

[11] https://blog.zoom.us/wordpress/2020/04/01/a-message-to-our-users/

View Most Recent Blogs