Advisories ยป MGASA-2021-0478

Updated thunderbird packages fix security vulnerabilities

Publication date: 13 Oct 2021
Type: security
Affected Mageia releases : 8
CVE: CVE-2021-32810 , CVE-2021-38496 , CVE-2021-38497 , CVE-2021-38498 , CVE-2021-38500 , CVE-2021-38501 , CVE-2021-38502


Updated thunderbird packages fix security vulnerabilities:

Due to a data race in the crossbeam-deque in the crossbeam crate, one or more
tasks in the worker queue could have been be popped twice instead of other
tasks that are forgotten and never popped. If tasks are allocated on the
heap, this could have caused a double free and a memory leak (CVE-2021-32810).

During operations on MessageTasks, a task may have been removed while it was
still scheduled, resulting in memory corruption and a potentially exploitable
crash due to a use-after-free in MessageTask (CVE-2021-38496).

Through use of reportValidity() and, a plain-text validation
message could have been overlaid on another origin, leading to possible user
confusion and spoofing attacks (CVE-2021-38497).

During process shutdown, a document could have caused a use-after-free of a
languages service object (nsLanguageAtomService), leading to memory corruption
and a potentially exploitable crash (CVE-2021-38498).

Mozilla developers and community members Andreas Pehrson, Christian Holler,
Kevin Brosnan, and Mihai Alexandru Michis reported memory safety bugs present
in Thunderbird 91.1. 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-2021-38500, CVE-2021-38501).

Thunderbird ignored the configuration to require STARTTLS security for an SMTP
connection. A MITM could perform a downgrade attack to intercept transmitted
messages, or could take control of the authenticated session to execute SMTP
commands chosen by the MITM. If an unprotected authentication method was
configured, the MITM could obtain the authentication credentials, too