SB2021111016 - SUSE update for MozillaFirefox
Published: November 10, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 8 secuirty vulnerabilities.
1) Security features bypass (CVE-ID: CVE-2021-38503)
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to the iframe sandbox rules were not correctly applied to XSLT stylesheets. A remote attacker can load use an iframe to bypass restrictions such as executing scripts or navigating the top-level frame.
2) Use-after-free (CVE-ID: CVE-2021-38504)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error when interacting with an HTML input element's file picker dialog with webkitdirectory set. A remote attacker can trick the victim to open a specially crafted website, trigger a use-after-free error and execute arbitrary code on the system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
3) Information disclosure (CVE-ID: CVE-2021-38505)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to absence of support for a new feature in Windows 10 known as Cloud Clipboard that, if enabled, will record data copied to the clipboard to the
cloud, and make it available on other computers in certain scenarios. Applications that wish to prevent copied data from being recorded in Cloud History must use specific clipboard formats, which were not implemented in previous versions of Firefox and Firefox ESR.
4) Insufficient UI Warning of Dangerous Operations (CVE-ID: CVE-2021-38506)
The vulnerability allows a remote attacker to perform spoofing attacks.
The vulnerability exists due to Firefox could have entered fullscreen mode without notification or warning to the user. A remote attacker can perform spoofing attacks on the browser UI.
5) Security features bypass (CVE-ID: CVE-2021-38507)
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists in the Opportunistic Encryption feature of HTTP2, which allows a connection to be transparently upgraded to TLS while retaining
the visual properties of an HTTP connection, including being
same-origin with unencrypted connections on port 80. However, if a second encrypted port on the same IP address (e.g. port
8443) did not opt-in to opportunistic encryption; a network attacker
could forward a connection from the browser from port 443 to port 8443,
causing the browser to treat the content of port 8443 as same-origin
with HTTP. As a result, a remote attacker can bypass Same-Origin-Policy on services hosted on other ports.
6) Improper Restriction of Rendered UI Layers or Frames (CVE-ID: CVE-2021-38508)
The vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to Firefox displays the 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 being tricked into granting the permission.
7) Improper Restriction of Rendered UI Layers or Frames (CVE-ID: CVE-2021-38509)
The vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to incorrect processing of an unusual sequence of attacker-controlled events. A remote attacker can display a Javascript alert() dialog with arbitrary (although unstyled) contents over top of arbitrary webpage of the attacker's choosing.
8) Insufficient UI Warning of Dangerous Operations (CVE-ID: CVE-2021-38510)
The vulnerability allows a remote attacker to silently download dangerous files on the system.
The vulnerability exists due to the executable file warning is not presented to the user when downloading .inetloc files. A remote attacker can silently download a potentially dangerous file to the user's system.
The vulnerability affects macOS operating system only.
Remediation
Install update from vendor's website.