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AUSCERT External Security Bulletin Redistribution
ESB-2022.4707
MFSA 2022-42 Security Vulnerabilities fixed in Thunderbird 102.3
23 September 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Mozilla Thunderbird
Publisher: Mozilla
Operating System: UNIX variants (UNIX, Linux, OSX)
Windows
Resolution: Patch/Upgrade
CVE Names: CVE-2022-40962 CVE-2022-40960 CVE-2022-40959
CVE-2022-40958 CVE-2022-40957 CVE-2022-40956
CVE-2022-3155
Original Bulletin:
https://www.mozilla.org/en-US/security/advisories/mfsa2022-42/
Comment: CVSS (Max): 7.5 CVE-2022-40962 (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H)
CVSS Source: Red Hat
Calculator: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
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Mozilla Foundation Security Advisory 2022-42
Security Vulnerabilities fixed in Thunderbird 102.3
Announced: September 20, 2022
Impact: high
Products: Thunderbird
Fixed in: Thunderbird 102.3
In general, these flaws cannot be exploited through email in the Thunderbird
product because scripting is disabled when reading mail, but are potentially
risks in browser or browser-like contexts.
# CVE-2022-40959: Bypassing FeaturePolicy restrictions on transient pages
Reporter: Armin Ebert
Impact: high
Description
During iframe navigation, certain pages did not have their FeaturePolicy fully
initialized leading to a bypass that leaked device permissions into untrusted
subdocuments.
References
o Bug 1782211
# CVE-2022-40960: Data-race when parsing non-UTF-8 URLs in threads
Reporter: Armin Ebert
Impact: high
Description
Concurrent use of the URL parser with non-UTF-8 data was not thread-safe. This
could lead to a use-after-free causing a potentially exploitable crash.
References
o Bug 1787633
# CVE-2022-40958: Bypassing Secure Context restriction for cookies with __Host
and __Secure prefix
Reporter: Axel Chong (@Haxatron)
Impact: moderate
Description
By injecting a cookie with certain special characters, an attacker on a shared
subdomain which is not a secure context could set and thus overwrite cookies
from a secure context, leading to session fixation and other attacks.
References
o Bug 1779993
# CVE-2022-40956: Content-Security-Policy base-uri bypass
Reporter: Satoki Tsuji
Impact: low
Description
When injecting an HTML base element, some requests would ignore the CSP's
base-uri settings and accept the injected element's base instead.
References
o Bug 1770094
# CVE-2022-40957: Incoherent instruction cache when building WASM on ARM64
Reporter: Gary Kwong
Impact: low
Description
Inconsistent data in instruction and data cache when creating wasm code could
lead to a potentially exploitable crash.
This bug only affects Thunderbird on ARM64 platforms.
References
o Bug 1777604
# CVE-2022-3155: Attachment files saved to disk on macOS could be executed
without warning
Reporter: Koh M. Nakagawa
Impact: low
Description
When saving or opening an email attachment on macOS, Thunderbird did not set
attribute com.apple.quarantine on the received file. If the received file was
an application and the user attempted to open it, then the application was
started immediately without asking the user to confirm.
References
o Bug 1789061
# CVE-2022-40962: Memory safety bugs fixed in Thunderbird 102.3
Reporter: Mozilla developers and community
Impact: high
Description
Mozilla developers Nika Layzell, Timothy Nikkel, Jeff Muizelaar, Sebastian
Hengst, Andreas Pehrson, and the Mozilla Fuzzing Team reported memory safety
bugs present in Thunderbird 102.2. 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.
References
o Memory safety bugs fixed in Thunderbird 102.3
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