What We Do
How we do it
Resources
Company
ABOUT ESENTIRE
About Us
eSentire is The Authority in Managed Detection and Response Services, protecting the critical data and applications of 1500+ organizations in 80+ 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
Sep 20, 2022
eSentire Recognized as Top Global MDR Provider by MSSP Alert, CrowdStrike and G2
Waterloo, ON - September 21, 2022 – eSentire, Inc., the Authority in Managed Detection and Response (MDR), celebrated multiple industry recognitions as the leading global MDR provider, over the last week: Named #9, and the top pure play MDR provider on MSSP Alert’s Top 250 MSSPs global rankingRecognized as the CrowdStrike 2022 Global MSSP Partner of the Year Earned G2’s industry-renowned status…
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 — Jun 19, 2019

Firefox Zero-Day Vulnerability

1 minute read
Speak With A Security Expert Now

The Threat

On June 18th, 2019, Mozilla released a critical advisory (CVE-2019-11707) for a 'type confusion' vulnerability that is being actively exploited in the wild [1]. If successful, exploitation enables remote malicious actors to take full control of any vulnerable system(s).

The researcher that discovered this flaw indicates the bug can be exploited for UXSS (Universal Cross-Site Scripting) or RCE (Remote Code Execution) [2]. While both methods are serious, it is worth noting RCE would require additional complexities for successful exploitation (e.g. sandbox escape), while UXSS is a type of attack that could necessitate the execution of malicious code via client-side vulnerabilities.

Mozilla has indicated the following versions are fixed and protected against this critical flaw: 67.0.3 and Firefox ESR 60.7.1 [3]. It is highly recommended to apply the security patches after performing a business impact review, as attacks exploiting CVE-2019-11707 are already occurring.

What we’re doing about it

What you should do about it

Additional information

The vulnerability resides in the Array.pop file which is an array method is used by Firefox in JavaScript objects. There are not currently any workarounds for this issue outside of applying security patches. If not already enabled, it is recommended to turn on auto-updates for Firefox [4].

Attacks in the wild are speculatively believed to be financially motivated and targeting cryptocurrency exchanges.

References:

[1] https://www.mozilla.org/en-US/security/advisories/mfsa2019-18/

[2] https://twitter.com/5aelo/status/1141273396958900224

[3] https://www.securityfocus.com/bid/108810/info

[4] https://www.technipages.com/enable-disable-automatic-updates-in-firefox

Join 100,000+ Security Leaders

Get notified when there's a new security advisory, and receive the latest news, intel and helpful tools & assets. You can unsubscribe anytime.

By clicking the button below I confirm that I have read and agree to the eSentire privacy policy.

View Most Recent Blogs