Subject: [ASA-201906-18] firefox: arbitrary code execution

Arch Linux Security Advisory ASA-201906-18
==========================================

Severity: Critical
Date    : 2019-06-19
CVE-ID  : CVE-2019-11707
Package : firefox
Type    : arbitrary code execution
Remote  : Yes
Link    : https://security.archlinux.org/AVG-994

Summary
=======

The package firefox before version 67.0.3-1 is vulnerable to arbitrary
code execution.

Resolution
==========

Upgrade to 67.0.3-1.

# pacman -Syu "firefox>=67.0.3-1"

The problem has been fixed upstream in version 67.0.3.

Workaround
==========

None.

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

A type confusion vulnerability can occur when manipulating JavaScript
objects due to issues in Array.pop, in Firefox before 67.0.3. This can
allow for an exploitable crash. Mozilla has been made aware of targeted
attacks in the wild abusing this flaw.

Impact
======

A remote attacker can execute arbitrary code via crafted Javascript
code.

References
==========

https://www.mozilla.org/en-US/security/advisories/mfsa2019-18
https://www.mozilla.org/en-US/security/advisories/mfsa2019-18/#CVE-2019-11707
https://bugzilla.mozilla.org/show_bug.cgi?id=1544386
https://security.archlinux.org/CVE-2019-11707