Arch Linux: 201903-14 Critical: Firefox Arbitrary Code Execution

Arch Linux Security Advisory ASA-201903-14
=========================================
Severity: Critical
Date    : 2019-03-23
CVE-ID  : CVE-2019-9810 CVE-2019-9813
Package : firefox
Type    : arbitrary code execution
Remote  : Yes
Link    : https://security.archlinux.org/AVG-930

Summary
======
The package firefox before version 66.0.1-1 is vulnerable to arbitrary
code execution.

Resolution
=========
Upgrade to 66.0.1-1.

# pacman -Syu "firefox>=66.0.1-1"

The problems have been fixed upstream in version 66.0.1.

Workaround
=========
None.

Description
==========
- CVE-2019-9810 (arbitrary code execution)

An incorrect alias information in the IonMonkey JIT compiler of Firefox
before 66.0.1 for the Array.prototype.slice method may lead to missing
bounds check and a buffer overflow.

- CVE-2019-9813 (arbitrary code execution)

An incorrect handling of __proto__ mutations may lead to type confusion
in the IonMonkey JIT code of Firefox before 66.0.1 and can be leveraged
for arbitrary memory read and write.

Impact
=====
A remote attacker can execute arbitrary code on the affected host.

References
=========
https://www.mozilla.org/en-US/security/advisories/mfsa2019-09/
https://www.mozilla.org/en-US/security/advisories/mfsa2019-09/#CVE-2019-9810
https://bugzilla.mozilla.org/show_bug.cgi?id=1537924
https://www.mozilla.org/en-US/security/advisories/mfsa2019-09/#CVE-2019-9813
https://bugzilla.mozilla.org/show_bug.cgi?id=1538006
https://security.archlinux.org/CVE-2019-9810
https://security.archlinux.org/CVE-2019-9813