Rapid7 Vulnerability & Exploit Database

MFSA2021-03 Firefox: Security Vulnerabilities fixed in Firefox 85 (CVE-2021-23960)

Back to Search

MFSA2021-03 Firefox: Security Vulnerabilities fixed in Firefox 85 (CVE-2021-23960)

Severity
7
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:P)
Published
01/26/2021
Created
01/28/2021
Added
01/27/2021
Modified
03/05/2021

Description

Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.

Solution(s)

  • mozilla-firefox-upgrade-85_0

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;