Mozilla Foundation Security Advisory 2017-17

Security vulnerabilities fixed in Thunderbird 52.2

Announced
June 14, 2017
Impact
critical
Products
Thunderbird
Fixed in
  • Thunderbird 52.2

In general, these flaws cannot be exploited through email in the Thunderbird product because scripting is disabled when reading mail, but are potentially risks in browser or browser-like contexts.

#CVE-2017-5472: Use-after-free using destroyed node when regenerating trees

Reporter
Nils
Impact
critical
Description

A use-after-free vulnerability with the frameloader during tree reconstruction while regenerating CSS layout when attempting to use a node in the tree that no longer exists. This results in a potentially exploitable crash.

References

#CVE-2017-7749: Use-after-free during docshell reloading

Reporter
Nils
Impact
high
Description

A use-after-free vulnerability when using an incorrect URL during the reloading of a docshell. This results in a potentially exploitable crash.

References

#CVE-2017-7750: Use-after-free with track elements

Reporter
Nils
Impact
high
Description

A use-after-free vulnerability during video control operations when a <track> element holds a reference to an older window if that window has been replaced in the DOM. This results in a potentially exploitable crash.

References

#CVE-2017-7751: Use-after-free with content viewer listeners

Reporter
Nils
Impact
high
Description

A use-after-free vulnerability with content viewer listeners that results in a potentially exploitable crash.

References

#CVE-2017-7752: Use-after-free with IME input

Reporter
Nils
Impact
moderate
Description

A use-after-free vulnerability during specific user interactions with the input method editor (IME) in some languages due to how events are handled. This results in a potentially exploitable crash but would require specific user interaction to trigger.

References

#CVE-2017-7754: Out-of-bounds read in WebGL with ImageInfo object

Reporter
Tobias Klein
Impact
high
Description

An out-of-bounds read in WebGL with a maliciously crafted ImageInfo object during WebGL operations.

References

#CVE-2017-7756: Use-after-free and use-after-scope logging XHR header errors

Reporter
Abhishek Arya
Impact
high
Description

A use-after-free and use-after-scope vulnerability when logging errors from headers for XML HTTP Requests (XHR). This could result in a potentially exploitable crash.

References

#CVE-2017-7757: Use-after-free in IndexedDB

Reporter
F. Alonso (revskills)
Impact
high
Description

A use-after-free vulnerability in IndexedDB when one of its objects is destroyed in memory while a method on it is still being executed. This results in a potentially exploitable crash.

References

#CVE-2017-7778: Vulnerabilities in the Graphite 2 library

Reporter
Holger Fuhrmannek, Tyson Smith
Impact
high
Description

A number of security vulnerabilities in the Graphite 2 library including out-of-bounds reads, buffer overflow reads and writes, and the use of uninitialized memory. These issues were addressed in Graphite 2 version 1.3.10.

References

#CVE-2017-7758: Out-of-bounds read in Opus encoder

Reporter
Nicolas Trippar of Zimperium zLabs
Impact
high
Description

An out-of-bounds read vulnerability with the Opus encoder when the number of channels in an audio stream changes while the encoder is in use.

References

#CVE-2017-7763: Mac fonts render some unicode characters as spaces

Reporter
Michał Bentkowski
Impact
moderate
Description

Default fonts on OS X display some Tibetan characters as whitespace. When used in the addressbar as part of an IDN this can be used for domain name spoofing attacks.
Note: This attack only affects OS X operating systems. Other operating systems are unaffected.

References

#CVE-2017-7764: Domain spoofing with combination of Canadian Syllabics and other unicode blocks

Reporter
Samuel Erb
Impact
moderate
Description

Characters from the "Canadian Syllabics" unicode block can be mixed with characters from other unicode blocks in the addressbar instead of being rendered as their raw "punycode" form, allowing for domain name spoofing attacks through character confusion. The current Unicode standard allows characters from "Aspirational Use Scripts" such as Canadian Syllabics to be mixed with Latin characters in the "moderately restrictive" IDN profile. We have changed Firefox behavior to match the upcoming Unicode version 10.0 which removes this category and treats them as "Limited Use Scripts."

References

#CVE-2017-7765: Mark of the Web bypass when saving executable files

Reporter
Jonathan Birch and Microsoft Vulnerability Research
Impact
moderate
Description

The "Mark of the Web" was not correctly saved on Windows when files with very long names were downloaded from the Internet. Without the Mark of the Web data, the security warning that Windows displays before running executables downloaded from the Internet is not shown.
Note: This attack only affects Windows operating systems. Other operating systems are unaffected.

References

#CVE-2017-5470: Memory safety bugs fixed in Firefox 54 and Firefox ESR 52.2, and Thunderbird 52.2

Reporter
Mozilla developers and community
Impact
critical
Description

Mozilla developers and community members Tyson Smith, Mats Palmgren, Philipp, Masayuki Nakano, Christian Holler, Andrew McCreight, Gary Kwong, André Bargull, Carsten Book, Jesse Schwartzentruber, Julian Hector, Marcia Knous, Ronald Crane, and Nils Ohlmeier reported memory safety bugs present in Firefox 53, Firefox ESR 52.1, and Thunderbird 52.1. 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