#14264: thunderbird-78.5.0
-------------------------+-----------------------
Reporter: bdubbs | Owner: renodr
Type: enhancement | Status: assigned
Priority: high | Milestone: 10.1
Component: BOOK | Version: SVN
Severity: normal | Resolution:
Keywords: |
-------------------------+-----------------------
Changes (by renodr):
* priority: normal => high
Comment:
{{{
What’s New
new
OpenPGP: Added option to disable attaching the public key to a signed
message
new
MailExtensions: "compose_attachments" context added to Menus API
new
MailExtensions: Menus API now available on displayed messages
Changes
changed
MailExtensions: browser.tabs.create will now wait for "mail-delayed-
startup-finished" event
Fixes
fixed
OpenPGP: Support for inline PGP messages improved
fixed
OpenPGP: Message security dialog showed unverified keys as unavailable
fixed
Chat: New chat contact menu item did not function
fixed
Various theme and usability improvements
fixed
Various security fixes
}}}
And now for the security fixes:
{{{
Mozilla Foundation Security Advisory 2020-52
Security Vulnerabilities fixed in Thunderbird 78.5
Announced
November 17, 2020
Impact
high
Products
Thunderbird
Fixed in
Thunderbird 78.5
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-2020-26951: Parsing mismatches could confuse and bypass security
sanitizer for chrome privileged code
Reporter
Irvan Kurniawan (@sourc7)
Impact
high
Description
A parsing and event loading mismatch in Thunderbird's SVG code could have
allowed load events to fire, even after sanitization. An attacker already
capable of exploiting an XSS vulnerability in privileged internal pages
could have used this attack to bypass our built-in sanitizer.
References
Bug 1667113
#CVE-2020-16012: Variable time processing of cross-origin images during
drawImage calls
Reporter
Aleksejs Popovs
Impact
moderate
Description
When drawing a transparent image on top of an unknown cross-origin image,
the Skia library drawImage function took a variable amount of time
depending on the content of the underlying image. This resulted in
potential cross-origin information exposure of image content through
timing side-channel attacks.
References
Bug 1642028
#CVE-2020-26953: Fullscreen could be enabled without displaying the
security UI
Reporter
Abdulrahman Alqabandi of Microsoft Browser Vulnerability Research
Impact
moderate
Description
It was possible to cause the browser to enter fullscreen mode without
displaying the security UI; thus making it possible to attempt a phishing
attack or otherwise confuse the user.
References
Bug 1656741
#CVE-2020-26956: XSS through paste (manual and clipboard API)
Reporter
Irvan Kurniawan (@sourc7)
Impact
moderate
Description
In some cases, removing HTML elements during sanitization would keep
existing SVG event handlers and therefore lead to XSS.
References
Bug 1666300
#CVE-2020-26958: Requests intercepted through ServiceWorkers lacked MIME
type restrictions
Reporter
Moti Harmats
Impact
moderate
Description
Thunderbird did not block execution of scripts with incorrect MIME types
when the response was intercepted and cached through a ServiceWorker. This
could lead to a cross-site script inclusion vulnerability, or a Content
Security Policy bypass.
References
Bug 1669355
#CVE-2020-26959: Use-after-free in WebRequestService
Reporter
Bharadwaj Machiraju
Impact
moderate
Description
During browser shutdown, reference decrementing could have occured on a
previously freed object, resulting in a use-after-free, memory corruption,
and a potentially exploitable crash.
References
Bug 1669466
#CVE-2020-26960: Potential use-after-free in uses of nsTArray
Reporter
Zijie Zhao
Impact
moderate
Description
If the Compact() method was called on an nsTArray, the array could have
been reallocated without updating other pointers, leading to a potential
use-after-free and exploitable crash.
References
Bug 1670358
#CVE-2020-15999: Heap buffer overflow in freetype
Reporter
Sergei Glazunov of Google Project Zero
Impact
moderate
Description
In Freetype, if PNG images were embedded into fonts, the Load_SBit_Png
function contained an integer overflow that led to a heap buffer overflow,
memory corruption, and an exploitable crash.
Note: While Project Zero did discover instances of this vulnerability
being exploited in the wild against Chrome, in Thunderbird this
vulnerability is only triggerable if a rarely-used, hidden preference is
toggled, and only affected Linux and Android operating systems. Other
operating systems are unaffected; and Linux and Android are unaffected in
the default configuration.
References
Bug 1672223
#CVE-2020-26961: DoH did not filter IPv4 mapped IP Addresses
Reporter
Gabriel Corona
Impact
moderate
Description
When DNS over HTTPS is in use, it intentionally filters RFC1918 and
related IP ranges from the responses as these do not make sense coming
from a DoH resolver. However when an IPv4 address was mapped through IPv6,
these addresses were erroneously let through, leading to a potential DNS
Rebinding attack.
References
Bug 1672528
#CVE-2020-26965: Software keyboards may have remembered typed passwords
Reporter
Makoto Kato
Impact
low
Description
Some websites have a feature "Show Password" where clicking a button will
change a password field into a textbook field, revealing the typed
password. If, when using a software keyboard that remembers user input, a
user typed their password and used that feature, the type of the password
field was changed, resulting in a keyboard layout change and the
possibility for the software keyboard to remember the typed password.
References
Bug 1661617
#CVE-2020-26966: Single-word search queries were also broadcast to local
network
Reporter
tiebuchen
Impact
low
Description
Searching for a single word from the address bar caused an mDNS request to
be sent on the local network searching for a hostname consisting of that
string; resulting in an information leak.
Note: This issue only affected Windows operating systems. Other operating
systems are unaffected.
References
Bug 1663571
#CVE-2020-26968: Memory safety bugs fixed in Thunderbird 78.5
Reporter
Mozilla developers and community
Impact
high
Description
Mozilla developers Steve Fink, Jason Kratzer, Randell Jesup, Christian
Holler, and Byron Campen reported memory safety bugs present in
Thunderbird 78.4. Some of these bugs showed evidence of memory corruption
and we presume that with enough effort some of these could have been
exploited to run arbitrary code.
References
Memory safety bugs fixed in Thunderbird 78.5
}}}
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