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AUSCERT External Security Bulletin Redistribution
ESB-2022.3152
MFSA 2022-25 Security Vulnerabilities fixed in Firefox ESR 91.11
29 June 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Firefox ESR
Publisher: Mozilla
Operating System: Windows
Unix variants
Resolution: Patch/Upgrade
CVE Names: CVE-2022-34484 CVE-2022-34481 CVE-2022-34479
CVE-2022-34478 CVE-2022-34472 CVE-2022-34470
CVE-2022-34468 CVE-2022-31744 CVE-2022-2200
Original Bulletin:
https://www.mozilla.org/en-US/security/advisories/mfsa2022-25/
Comment: CVSS (Max): None available when published
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Mozilla Foundation Security Advisory 2022-25
Security Vulnerabilities fixed in Firefox ESR 91.11
Announced: June 28, 2022
Impact: high
Products: Firefox ESR
Fixed in: Firefox ESR 91.11
Note: While Bug 1771084 does not represent a specific vulnerability that was
fixed, we recommend anyone rebasing patches to include it. 102 branch: Patch 1
and 2. 91 Branch: Patch 1 and 2 (Despite saying Parts 2 and 3, there is no Part
1)
# CVE-2022-34479: A popup window could be resized in a way to overlay the
address bar with web content
Reporter: Irvan Kurniawan
Impact: high
Description
A malicious website that could create a popup could have resized the popup to
overlay the address bar with its own content, resulting in potential user
confusion or spoofing attacks.
This bug only affects Firefox for Linux. Other operating systems are
unaffected.
References
o Bug 1745595
# CVE-2022-34470: Use-after-free in nsSHistory
Reporter: Armin Ebert
Impact: high
Description
Navigations between XML documents may have led to a use-after-free and
potentially exploitable crash.
References
o Bug 1765951
# CVE-2022-34468: CSP sandbox header without `allow-scripts` can be bypassed via
retargeted javascript: URI
Reporter: Armin Ebert
Impact: high
Description
An iframe that was not permitted to run scripts could do so if the user clicked
on a javascript: link.
References
o Bug 1768537
# CVE-2022-34481: Potential integer overflow in ReplaceElementsAt
Reporter: Ronald Crane
Impact: moderate
Description
In the nsTArray_Impl::ReplaceElementsAt() function, an integer overflow could
have occurred when the number of elements to replace was too large for the
container.
References
o Bug 1497246
# CVE-2022-31744: CSP bypass enabling stylesheet injection
Reporter: Gertjan
Impact: moderate
Description
An attacker could have injected CSS into stylesheets accessible via internal
URIs, such as resource:, and in doing so bypass a page's Content Security
Policy.
References
o Bug 1757604
# CVE-2022-34472: Unavailable PAC file resulted in OCSP requests being blocked
Reporter: Laurent Bigonville
Impact: moderate
Description
If there was a PAC URL set and the server that hosts the PAC was not reachable,
OCSP requests would have been blocked, resulting in incorrect error pages being
shown.
References
o Bug 1770123
# CVE-2022-34478: Microsoft protocols can be attacked if a user accepts a prompt
Reporter: Gijs
Impact: moderate
Description
The ms-msdt, search, and search-ms protocols deliver content to Microsoft
applications, bypassing the browser, when a user accepts a prompt. These
applications have had known vulnerabilities, exploited in the wild (although we
know of none exploited through Firefox), so in this release Firefox has blocked
these protocols from prompting the user to open them.
This bug only affects Firefox on Windows. Other operating systems are
unaffected.
References
o Bug 1773717
# CVE-2022-2200: Undesired attributes could be set as part of prototype
pollution
Reporter: Manfred Paul via Trend Micro's Zero Day Initiative
Impact: moderate
Description
If an object prototype was corrupted by an attacker, they would have been able
to set undesired attributes on a JavaScript object, leading to privileged code
execution.
References
o Bug 1771381
# CVE-2022-34484: Memory safety bugs fixed in Firefox 102 and Firefox ESR 91.11
Reporter: Mozilla developers and community
Impact: high
Description
The Mozilla Fuzzing Team reported potential vulnerabilities present in Firefox
101 and Firefox ESR 91.10. 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 102 and Firefox ESR 91.11
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