Log Message:
Update to 52.5.0

Changelog:
#CVE-2017-7828: Use-after-free of PressShell while restyling layout

Reporter
    Nils
Impact
    critical

Description
A use-after-free vulnerability can occur when flushing and resizing
layout because the PressShell object has been freed while still in use.
This results in a potentially exploitable crash during these operations.

References
    Bug 1406750
    Bug 1412252

#CVE-2017-7830: Cross-origin URL information leak through Resource Timing API

Reporter
    Jun Kokatsu
Impact
    high

Description
The Resource Timing API incorrectly revealed navigations in cross-origin
iframes. This is a same-origin policy violation and could allow for data
theft of URLs loaded by users.

References
    Bug 1408990

#CVE-2017-7826: Memory safety bugs fixed in Firefox 57, Firefox ESR 52.5,
and Thunderbird 52.5

Reporter
    Mozilla developers and community
Impact
    critical

Description
Mozilla developers and community members Christian Holler, David Keeler,
Jon Coppeard, Julien Cristau, Jan de Mooij, Jason Kratzer, Philipp,
Nicholas Nethercote, Oriol Brufau, André Bargull, Bob Clary,
Jet Villegas, Randell Jesup, Tyson Smith, Gary Kwong, and Ryan VanderMeulen
reported memory safety bugs present in Firefox 56, Firefox ESR 52.4, and
Thunderbird 52.4. Some of these bugs showed evidence of memory corruption
and we presume that with enough effort that some of these could be
exploited to run arbitrary code.

References
    Memory safety bugs fixed in Firefox 57, Firefox ESR 52.5,
    and Thunderbird 52.5