Advisories ยป MGASA-2020-0300

Updated thunderbird packages fix security vulnerability

Publication date: 31 Jul 2020
Type: security
Affected Mageia releases : 7
CVE: CVE-2020-12398 , CVE-2020-12405 , CVE-2020-12406 , CVE-2020-12410 , CVE-2020-12418 , CVE-2020-12419 , CVE-2020-12420 , CVE-2020-12421


If Thunderbird is configured to use STARTTLS for an IMAP server, and the server
sends a PREAUTH response, then Thunderbird will continue with an unencrypted
connection, causing email data to be sent without protection (CVE-2020-12398).

When browsing a malicious page, a race condition in our SharedWorkerService
could occur and lead to a potentially exploitable crash due to a use-after-free

Mozilla developer Iain Ireland discovered a missing type check during unboxed
objects removal, resulting in a crash due to type confusion with NativeTypes. We
presume that with enough effort that it could be exploited to run arbitrary code

Mozilla developers Tom Tung and Karl Tomlinson reported memory safety bugs
present in Firefox ESR 68.8. 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 (CVE-2020-12410).

Manipulating individual parts of a URL object could have caused an
out-of-bounds read, leaking process memory to malicious JavaScript

When processing callbacks that occurred during window flushing in the parent
process, the associated window may die; causing a use-after-free in
nsGlobalWindowInner. This could have led to memory corruption and a
potentially exploitable crash (CVE-2020-12419).

When trying to connect to a STUN server, a race condition could have caused a
use-after-free of a pointer, leading to memory corruption and a potentially
exploitable crash (CVE-2020-12420).

If an attacker intercepts Thunderbird's initial attempt to perform automatic
account setup using the Microsoft Exchange autodiscovery mechanism, and the
attacker sends a crafted response, then Thunderbird sends username and
password over https to a server controlled by the attacker (MFSA-2020-0001).

When performing add-on updates, certificate chains terminating in
non-built-in-roots were rejected (even if they were legitimately added by an
administrator.) This could have caused add-ons to become out-of-date silently
without notification to the user (CVE-2020-12421).