Advisories ยป MGASA-2022-0221

Updated thunderbird packages fix security vulnerability

Publication date: 04 Jun 2022
Modification date: 04 Jun 2022
Type: security
Affected Mageia releases : 8
CVE: CVE-2022-1834 , CVE-2022-31736 , CVE-2022-31737 , CVE-2022-31738 , CVE-2022-31740 , CVE-2022-31741 , CVE-2022-31742 , CVE-2022-31747


When displaying the sender of an email, and the sender name contained the
Braille Pattern Blank space character multiple times, Thunderbird would have
displayed all the spaces. This could have been used by an attacker to send an
email message with the attacker's digital signature, that was shown with an
arbitrary sender email address chosen by the attacker. If the sender name
started with a false email address, followed by many Braille space characters,
the attacker's email address was not visible. Because Thunderbird compared the
invisible sender address with the signature's email address, if the signing
key or certificate was accepted by Thunderbird, the email was shown as having
a valid digital signature (CVE-2022-1834).

A malicious website could have learned the size of a cross-origin resource
that supported Range requests (CVE-2022-31736).

A malicious webpage could have caused an out-of-bounds write in WebGL, leading
to memory corruption and a potentially exploitable crash (CVE-2022-31737).

When exiting fullscreen mode, an iframe could have confused the browser about
the current state of fullscreen, resulting in potential user confusion or
spoofing attacks (CVE-2022-31738).

On arm64, WASM code could have resulted in incorrect assembly generation
leading to a register allocation problem, and a potentially exploitable crash

A crafted CMS message could have been processed incorrectly, leading to an
invalid memory read, and potentially further memory corruption

An attacker could have exploited a timing attack by sending a large number of
allowCredential entries and detecting the difference between invalid key
handles and cross-origin key handles. This could have led to cross-origin
account linking in violation of WebAuthn goals (CVE-2022-31742).

Mozilla developers Andrew McCreight, Nicolas B. Pierron, and the Mozilla
Fuzzing Team reported memory safety bugs present in Thunderbird 91.9. 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