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AUSCERT External Security Bulletin Redistribution
ESB-2022.2029
MFSA 2022-16 Security Vulnerabilities fixed in Firefox 100
5 May 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Firefox
Publisher: Mozilla
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Resolution: Patch/Upgrade
CVE Names: CVE-2022-29917 CVE-2022-29916 CVE-2022-29914
CVE-2022-29912 CVE-2022-29911 CVE-2022-29909
Original Bulletin:
https://www.mozilla.org/en-US/security/advisories/mfsa2022-16/
Comment: CVSS (Max): 7.5* CVE-2022-29917 (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/3.1#CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
* Not all CVSS available when published
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Mozilla Foundation Security Advisory 2022-17
Security Vulnerabilities fixed in Firefox ESR 91.9
Announced: May 3, 2022
Impact: high
Products: Firefox ESR
Fixed in: Firefox ESR 91.9
# CVE-2022-29914: Fullscreen notification bypass using popups
Reporter: Irvan Kurniawan
Impact: high
Description
When reusing existing popups Firefox would have allowed them to cover the
fullscreen notification UI, which could have enabled browser spoofing attacks.
References
o Bug 1746448
# CVE-2022-29909: Bypassing permission prompt in nested browsing contexts
Reporter: Armin Ebert
Impact: high
Description
Documents in deeply-nested cross-origin browsing contexts could have obtained
permissions granted to the top-level origin, bypassing the existing prompt and
wrongfully inheriting the top-level permissions.
References
o Bug 1755081
# CVE-2022-29916: Leaking browser history with CSS variables
Reporter: Mateusz Sionkowski
Impact: high
Description
Firefox behaved slightly differently for already known resources when loading
CSS resources involving CSS variables. This could have been used to probe the
browser history.
References
o Bug 1760674
# CVE-2022-29911: iframe Sandbox bypass
Reporter: Trung Pham
Impact: high
Description
Firefox did not properly protect against top-level navigations for an iframe
sandbox with a policy relaxed through a keyword like
allow-top-navigation-by-user-activation.
References
o Bug 1761981
# CVE-2022-29912: Reader mode bypassed SameSite cookies
Reporter: Matheus Vrech
Impact: moderate
Description
Requests initiated through reader mode did not properly omit cookies with a
SameSite attribute.
References
o Bug 1692655
# CVE-2022-29917: Memory safety bugs fixed in Firefox 100 and Firefox ESR 91.9
Reporter: Mozilla developers
Impact: high
Description
Mozilla developers Andrew McCreight, Gabriele Svelto, Tom Ritter and the
Mozilla Fuzzing Team reported memory safety bugs present in Firefox 99 and
Firefox ESR 91.8. 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.
References
o Memory safety bugs fixed in Firefox 100 and Firefox ESR 91.9
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