ArchLinux: 202111-3: thunderbird: multiple issues
Summary
- CVE-2021-38503 (sandbox escape)
A security issue has been found in Firefox before version 94 and
Thunderbird before version 91.3. The iframe sandbox rules were not
correctly applied to XSLT stylesheets, allowing an iframe to bypass
restrictions such as executing scripts or navigating the top-level
frame.
- CVE-2021-38504 (arbitrary code execution)
A security issue has been found in Firefox before version 94 and
Thunderbird before version 91.3. When interacting with an HTML input
element's file picker dialog with "webkitdirectory" set, a use-after-
free could have resulted, leading to memory corruption and a
potentially exploitable crash.
- CVE-2021-38506 (content spoofing)
A security issue has been found in Firefox before version 94 and
Thunderbird before version 91.3. Through a series of navigations,
Firefox and Thunderbird could have entered fullscreen mode without
notification or warning to the user. This could lead to spoofing
attacks on the browser UI including phishing.
- CVE-2021-38507 (same-origin policy bypass)
A security issue has been found in Firefox before version 94 and
Thunderbird before version 91.3. The Opportunistic Encryption feature
of HTTP2 (RFC 8164) allows a connection to be transparently upgraded to
TLS while retaining the visual properties of an HTTP connection,
including being same-origin with unencrypted connections on port 80.
However, if a second encrypted port on the same IP address (e.g. port
8443) did not opt-in to opportunistic encryption; a network attacker
could forward a connection from the browser to port 443 to port 8443,
causing the browser to treat the content of port 8443 as same-origin
with HTTP. This was resolved by disabling the Opportunistic Encryption
feature, which had low usage.
- CVE-2021-38508 (content spoofing)
A security issue has been found in Firefox before version 94 and
Thunderbird before version 91.3. By displaying a form validity message
in the correct location at the same time as a permission prompt (such
as for geolocation), the validity message could have obscured the
prompt, resulting in the user potentially being tricked into granting
the permission.
- CVE-2021-38509 (content spoofing)
A security issue has been found in Firefox before version 94 and
Thunderbird before version 91.3. Due to an unusual sequence of
attacker-controlled events, a Javascript alert() dialog with arbitrary
(although unstyled) contents could be displayed over top an
uncontrolled webpage of the attacker's choosing.
Resolution
Upgrade to 91.3.0-1.
# pacman -Syu "thunderbird>=91.3.0-1"
The problems have been fixed upstream in version 91.3.0.
References
https://www.mozilla.org/en-US/security/advisories/mfsa2021-48/ https://www.mozilla.org/en-US/security/advisories/mfsa2021-50/ https://bugzilla.mozilla.org/show_bug.cgi?id=1729517 https://bugzilla.mozilla.org/show_bug.cgi?id=1730156 https://bugzilla.mozilla.org/show_bug.cgi?id=1730750 https://bugzilla.mozilla.org/show_bug.cgi?id=1730935 https://bugzilla.mozilla.org/show_bug.cgi?id=1366818 https://bugzilla.mozilla.org/show_bug.cgi?id=1718571 https://security.archlinux.org/CVE-2021-38503 https://security.archlinux.org/CVE-2021-38504 https://security.archlinux.org/CVE-2021-38506 https://security.archlinux.org/CVE-2021-38507 https://security.archlinux.org/CVE-2021-38508 https://security.archlinux.org/CVE-2021-38509
Workaround
None.
