Arch Linux Security Advisory ASA-201902-16
==========================================

Severity: High
Date    : 2019-02-13
CVE-ID  : CVE-2018-18356 CVE-2018-18511 CVE-2019-5785
Package : firefox
Type    : multiple issues
Remote  : Yes
Link    : https://security.archlinux.org/AVG-896

Summary
=======

The package firefox before version 65.0.1-1 is vulnerable to multiple
issues including arbitrary code execution and same-origin policy
bypass.

Resolution
==========

Upgrade to 65.0.1-1.

# pacman -Syu "firefox>=65.0.1-1"

The problems have been fixed upstream in version 65.0.1.

Workaround
==========

None.

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

- CVE-2018-18356 (arbitrary code execution)

A use-after-free has been found in the Skia component of chromium
before 71.0.3578.80 and firefox before 65.0.1.

- CVE-2018-18511 (same-origin policy bypass)

A cross-origin theft of images issue has been found in the
ImageBitmapRenderingContext component of firefox 65.0, where cross-
origin images can be read from a canvas element in violation of the
same-origin policy using the transferFromImageBitmap method. The issue
has been fixed in 65.0.1 and versions prior to 65.0 were not affected.

- CVE-2019-5785 (arbitrary code execution)

An integer overflow issue has been found in the Skia component of
firefox before 65.0.1.

Impact
======

A remote attacker can bypass the same-origin policy to access sensitive
information, or execute arbitrary code, via a crafted web content.

References
==========

https://www.mozilla.org/en-US/security/advisories/mfsa2019-04/
https://chromereleases.googleblog.com/2018/12/stable-channel-update-for-desktop.html
https://bugs.chromium.org/p/chromium/issues/detail?id=883666
https://www.mozilla.org/en-US/security/advisories/mfsa2019-04/#CVE-2018-18356
https://bugzilla.mozilla.org/show_bug.cgi?id=1525817
https://www.mozilla.org/en-US/security/advisories/mfsa2019-04/#CVE-2019-5785
https://bugzilla.mozilla.org/show_bug.cgi?id=1526218
https://bugzilla.mozilla.org/show_bug.cgi?id=1525433
https://googleprojectzero.blogspot.com/2019/02/the-curious-case-of-convexity-confusion.html
https://security.archlinux.org/CVE-2018-18356
https://security.archlinux.org/CVE-2018-18511
https://security.archlinux.org/CVE-2019-5785