Mozilla Foundation Security Advisory 2018-13
Security vulnerabilities fixed in Thunderbird 52.8
- Announced
- May 18, 2018
- Impact
- critical
- Products
- Thunderbird
- Fixed in
-
- Thunderbird 52.8
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-2018-5183: Backport critical security fixes in Skia
- Reporter
- Mozilla Developers
- Impact
- critical
Description
Mozilla developers backported selected changes in the Skia library. These changes correct memory corruption issues including invalid buffer reads and writes during graphic operations.
References
#CVE-2018-5184: Full plaintext recovery in S/MIME via chosen-ciphertext attack
- Reporter
- Damian Poddebniak, Christian Dresen, Jens Müller, Fabian Ising, Sebastian Schinzel, Simon Friedberger, Juraj Somorovsky, Jörg Schwenk
- Impact
- high
Description
Using remote content in encrypted messages can lead to the disclosure of plaintext.
References
#CVE-2018-5154: Use-after-free with SVG animations and clip paths
- Reporter
- Nils
- Impact
- high
Description
A use-after-free vulnerability can occur while enumerating attributes during SVG animations with clip paths. This results in a potentially exploitable crash.
References
#CVE-2018-5155: Use-after-free with SVG animations and text paths
- Reporter
- Nils
- Impact
- high
Description
A use-after-free vulnerability can occur while adjusting layout during SVG animations with text paths. This results in a potentially exploitable crash.
References
#CVE-2018-5159: Integer overflow and out-of-bounds write in Skia
- Reporter
- Ivan Fratric
- Impact
- high
Description
An integer overflow can occur in the Skia library due to 32-bit integer use in an array without integer overflow checks, resulting in possible out-of-bounds writes. This could lead to a potentially exploitable crash triggerable by web content.
References
#CVE-2018-5161: Hang via malformed headers
- Reporter
- cure53
- Impact
- moderate
Description
Crafted message headers can cause a Thunderbird process to hang on receiving the message.
References
#CVE-2018-5162: Encrypted mail leaks plaintext through src attribute
- Reporter
- Damian Poddebniak, Christian Dresen, Jens Müller, Fabian Ising, Sebastian Schinzel, Simon Friedberger, Juraj Somorovsky, Jörg Schwenk
- Impact
- moderate
Description
Plaintext of decrypted emails can leak through the src attribute of remote images, or links.
References
#CVE-2018-5170: Filename spoofing for external attachments
- Reporter
- cure53
- Impact
- moderate
Description
It is possible to spoof the filename of an attachment and display an arbitrary attachment name. This could lead to a user opening a remote attachment which is a different file type than expected.
References
#CVE-2018-5168: Lightweight themes can be installed without user interaction
- Reporter
- Wladimir Palant
- Impact
- moderate
Description
Sites can bypass security checks on permissions to install lightweight themes by manipulating the baseURI property of the theme element. This could allow a malicious site to install a theme without user interaction which could contain offensive or embarrassing images.
References
#CVE-2018-5174: Windows Defender SmartScreen UI runs with less secure behavior for downloaded files in Windows 10 April 2018 Update
- Reporter
- Jimmy
- Impact
- moderate
Description
In the Windows 10 April 2018 Update, Windows Defender SmartScreen honors the SEE_MASK_FLAG_NO_UI flag associated with downloaded files and will not show any UI. Files that are unknown and potentially dangerous will be allowed to run because SmartScreen will not prompt the user for a decision, and if the user is offline all files will be allowed to be opened because Windows won’t prompt the user to ask what to do. Firefox incorrectly sets this flag when downloading files, leading to less secure behavior from SmartScreen.
Note: this issue only affects Windows 10 users running the April 2018 update or later. It does not affect other Windows users or other operating systems.
References
#CVE-2018-5178: Buffer overflow during UTF-8 to Unicode string conversion through legacy extension
- Reporter
- Root Object
- Impact
- moderate
Description
A buffer overflow was found during UTF8 to Unicode string conversion within JavaScript with extremely large amounts of data. This vulnerability requires the use of a malicious or vulnerable legacy extension in order to occur.
References
#CVE-2018-5185: Leaking plaintext through HTML forms
- Reporter
- Damian Poddebniak, Christian Dresen, Jens Müller, Fabian Ising, Sebastian Schinzel, Simon Friedberger, Juraj Somorovsky, Jörg Schwenk
- Impact
- low
Description
Plaintext of decrypted emails can leak through by user submitting an embedded form.
References
#CVE-2018-5150: Memory safety bugs fixed in Firefox 60, Firefox ESR 52.8, and Thunderbird 52.8
- Reporter
- Mozilla developers and community
- Impact
- critical
Description
Mozilla developers and community members Christoph Diehl, Randell Jesup, Tyson Smith, Alex Gaynor, Ronald Crane, Julian Hector, Kannan Vijayan, and Jason Kratzer reported memory safety bugs present in Firefox 59, Firefox ESR 52.7, and Thunderbird 52.7. 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.