[ASA-202004-8] firefox: multiple issues

[Remi Gacogne]

Arch Linux Security Advisory ASA-202004-8
=========================================

Severity: Critical
Date    : 2020-04-08
CVE-ID  : CVE-2020-6821 CVE-2020-6823 CVE-2020-6824 CVE-2020-6825
          CVE-2020-6826
Package : firefox
Type    : multiple issues
Remote  : Yes
Link    : https://security.archlinux.org/AVG-1127

Summary
=======

The package firefox before version 75.0-1 is vulnerable to multiple
issues including arbitrary code execution, information disclosure and
access restriction bypass.

Resolution
==========

Upgrade to 75.0-1.

# pacman -Syu "firefox>=75.0-1"

The problems have been fixed upstream in version 75.0.

Workaround
==========

None.

Description
===========

- CVE-2020-6821 (information disclosure)

An information disclosure issue has been found in Firefox before 75.0.
When reading from areas partially or fully outside the source resource
with WebGL's copyTexSubImage method, the specification requires the
returned values be zero. Previously, this memory was uninitialized,
leading to potentially sensitive data disclosure.

- CVE-2020-6823 (access restriction bypass)

A security issue has been found in Firefox before 75.0, where a
malicious extension could have called
browser.identity.launchWebAuthFlow, controlling the redirect_uri, and
through the Promise returned, obtain the Auth code and gain access to
the user's account at the service provider.

- CVE-2020-6824 (information disclosure)

A security issue has been found in Firefox before 75.0, where generated
passwords may be identical on the same site between separate private
browsing sessions. Initially, a user opens a Private Browsing Window
and generates a password for a site, then closes the Private Browsing
Window but leaves Firefox open. Subsequently, if the user had opened a
new Private Browsing Window, revisited the same site, and generated a
new password - the generated passwords would have been identical,
rather than independent.

- CVE-2020-6825 (arbitrary code execution)

Several memory safety issues have been found in Firefox before 75.0.
Some of these bugs showed evidence of memory corruption and Mozilla
presumes that with enough effort some of these could have been
exploited to run arbitrary code.

- CVE-2020-6826 (arbitrary code execution)

Several memory safety issues have been found in Firefox before 75.0.
Some of these bugs showed evidence of memory corruption and Mozilla
presumes that with enough effort some of these could have been
exploited to run arbitrary code.

Impact
======

A remote attacker might be able to access sensitive information, bypass
security restrictions or execute arbitrary code.

References
==========

https://www.mozilla.org/en-US/security/advisories/mfsa2020-12/
https://www.mozilla.org/en-US/security/advisories/mfsa2020-12/#CVE-2020-6821
https://bugzilla.mozilla.org/show_bug.cgi?id=1625404
https://www.mozilla.org/en-US/security/advisories/mfsa2020-12/#CVE-2020-6823
https://bugzilla.mozilla.org/show_bug.cgi?id=1614919
https://www.mozilla.org/en-US/security/advisories/mfsa2020-12/#CVE-2020-6824
https://bugzilla.mozilla.org/show_bug.cgi?id=1621853
https://www.mozilla.org/en-US/security/advisories/mfsa2020-12/#CVE-2020-6825
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1572541%2C1620193%2C1620203
https://www.mozilla.org/en-US/security/advisories/mfsa2020-12/#CVE-2020-6826
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1613009%2C1613195%2C1616734%2C1617488%2C1619229%2C1620719%2C1624897
https://security.archlinux.org/CVE-2020-6821
https://security.archlinux.org/CVE-2020-6823
https://security.archlinux.org/CVE-2020-6824
https://security.archlinux.org/CVE-2020-6825
https://security.archlinux.org/CVE-2020-6826

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