CVE-2020-12398

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. This vulnerability affects Thunderbird < 68.9.0.

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. This vulnerability affects Thunderbird < 68.9.0.

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 (CVE-2020-12405).

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 (CVE-2020-12406).

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 (CVE-2020-12418).

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).

This update for MozillaThunderbird fixes the following issues:

Mozilla Thunderbird 68.9.0 (bsc#1172402)

• CVE-2020-12405: Fixed a use-after-free in SharedWorkerService.
• CVE-2020-12406: Fixed a JavaScript Type confusion with NativeTypes.
• CVE-2020-12410: Fixed multiple memory safety issues
• CVE-2020-12398: Fixed a potential information leak due to security downgrade with IMAP STARTTLS
• Use a symbolic icon from branding internals

This update was imported from the SUSE:SLE-15:Update update project.

These are all security issues fixed in the MozillaThunderbird-91.1.1-1.1 package on the GA media of openSUSE Tumbleweed.

This update for MozillaThunderbird fixes the following issues:

Mozilla Thunderbird 68.9.0 (bsc#1172402)

• CVE-2020-12405: Fixed a use-after-free in SharedWorkerService.
• CVE-2020-12406: Fixed a JavaScript Type confusion with NativeTypes.
• CVE-2020-12410: Fixed multiple memory safety issues
• CVE-2020-12398: Fixed a potential information leak due to security downgrade with IMAP STARTTLS
• Use a symbolic icon from branding internals

This update for MozillaThunderbird fixes the following issues:

Mozilla Thunderbird 68.9.0 (bsc#1172402)

• CVE-2020-12405: Fixed a use-after-free in SharedWorkerService.
• CVE-2020-12406: Fixed a JavaScript Type confusion with NativeTypes.
• CVE-2020-12410: Fixed multiple memory safety issues
• CVE-2020-12398: Fixed a potential information leak due to security downgrade with IMAP STARTTLS
• Use a symbolic icon from branding internals

Multiple security issues were discovered in Thunderbird. If a user were tricked in to opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, or execute arbtirary code. (CVE-2020-12405, CVE-2020-12406, CVE-2020-12410, CVE-2020-12417, CVE-2020-12418, CVE-2020-12419, CVE-2020-12420)

It was discovered that Thunderbird would continue an unencrypted connection when configured to use STARTTLS for IMAP if the server responded with PREAUTH. A remote attacker could potentially exploit this to perform a person-in-the-middle attack in order to obtain sensitive information. (CVE-2020-12398)

It was discovered that NSS showed timing differences when performing DSA signatures. An attacker could potentially exploit this to obtain private keys using a timing attack. (CVE-2020-12399)

It was discovered that when performing add-on updates, certificate chains not terminating with built-in roots were silently rejected. This could result in add-ons becoming outdated. (CVE-2020-12421)