Red Hat Security AdvisoryRHSA-2021:4116
firefox security update
Released 2021-11-03 · Red Hat rating Important · View on Red Hat →
Fixed in
- Red Hat Enterprise Linux Client (v. 7) firefox-91.3.0-1.el7_9
- Red Hat Enterprise Linux Client Optional (v. 7) firefox-91.3.0-1.el7_9
- Red Hat Enterprise Linux Server (v. 7) firefox-91.3.0-1.el7_9
- Red Hat Enterprise Linux Server Optional (v. 7) firefox-91.3.0-1.el7_9
- Red Hat Enterprise Linux Workstation (v. 7) firefox-91.3.0-1.el7_9
- Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-91.3.0-1.el7_9
Fixes 8 records
Priority MEDIUM 50
The iframe sandbox rules were not correctly applied to XSLT stylesheets, allowing an iframe to bypass restrictions such as executing scripts or navigating the top-level frame.
CVSS 3.1CRITICAL 10.0· Network · No auth · No interaction · EPSS 0.04116 · Published 2021-12-08 · Partial fix · 94, 91.3 CWE-863
Priority MEDIUM 42
When interacting with an HTML input element's file picker dialog with webkitdirectory set, a use-after-free could have resulted, leading to memory corruption and a potentially exploitable crash.
CVSS 3.1HIGH 8.8· Network · No auth · User interaction · EPSS 0.01766 · Published 2021-12-08 · Partial fix · 94, 91.3 CWE-416
Priority MEDIUM 41
Mozilla developers and community members reported memory safety bugs present in Firefox 93 and Firefox ESR 91.2.
CVSS 3.1HIGH 8.8· Network · No auth · User interaction · EPSS 0.01248 · Published 2021-12-08 · Partial fix · 94, 91.3 CWE-787
Priority MEDIUM 40
A use-after-free could have occured when an HTTP2 session object was released on a different thread, leading to memory corruption and a potentially exploitable crash.
CVSS 3.1HIGH 8.8· Network · No auth · User interaction · EPSS 0.01147 · Published 2021-12-08 · Partial fix · 93, 91.3 CWE-416
Priority LOW 30
The Opportunistic Encryption feature of HTTP2 (RFC 8164) allows a connection to be transparently upgraded to TLS while retaining the visual properties of an HTTP connection, including being same-origin with unencrypted c…
CVSS 3.1MEDIUM 6.5· Network · No auth · User interaction · EPSS 0.00832 · Published 2021-12-08 · Partial fix · 94, 91.3 CWE-346
Priority LOW 24
Due to an unusual sequence of attacker-controlled events, a Javascript alert() dialog with arbitrary (although unstyled) contents could be displayed over top an uncontrolled webpage of the attacker's choosing.
CVSS 3.1MEDIUM 4.3· Network · No auth · User interaction · EPSS 0.01759 · Published 2021-12-08 · Partial fix · 94, 91.3 CWE-1021
Priority LOW 23
By displaying a form validity message in the correct location at the same time as a permission prompt (such as for geolocation), the validity message could have obscured the prompt, resulting in the user potentially bein…
CVSS 3.1MEDIUM 4.3· Network · No auth · User interaction · EPSS 0.01642 · Published 2021-12-08 · Partial fix · 94, 91.3 CWE-1021
Priority LOW 23
Through a series of navigations, Firefox could have entered fullscreen mode without notification or warning to the user.
CVSS 3.1MEDIUM 4.3· Network · No auth · User interaction · EPSS 0.01507 · Published 2021-12-08 · Partial fix · 94, 91.3 CWE-1021
THREATIST.IORead the docs