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AUSCERT External Security Bulletin Redistribution
ESB-2021.1896
MFSA 2021-24 Security Vulnerabilities fixed in Firefox ESR 78.11
2 June 2021
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AusCERT Security Bulletin Summary
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Product: Firefox ESR
Publisher: Mozilla
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Access Confidential Data -- Remote with User Interaction
Reduced Security -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2021-29967 CVE-2021-29964
Original Bulletin:
https://www.mozilla.org/en-US/security/advisories/mfsa2021-24/
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Mozilla Foundation Security Advisory 2021-24
Security Vulnerabilities fixed in Firefox ESR 78.11
Announced: June 1, 2021
Impact: moderate
Products: Firefox ESR
Fixed in: Firefox ESR 78.11
# CVE-2021-29964: Out of bounds-read when parsing a `WM_COPYDATA` message
Reporter: Ronald Crane
Impact: moderate
Description
A locally-installed hostile program could send WM_COPYDATA messages that
Firefox would processing incorrectly, leading to an out-of-bounds read.
This bug only affects Firefox on Windows. Other operating systems are
unaffected.
References
o Bug 1706501
# CVE-2021-29967: Memory safety bugs fixed in Firefox 89 and Firefox ESR 78.11
Reporter: Mozilla developers and community
Impact: high
Description
Mozilla developers Gabriele Svelto, Anny Gakhokidze, Alexandru Michis,
Christian Holler reported memory safety bugs present in Firefox 88 and Firefox
ESR 78.11. 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 89 and Firefox ESR 78.11
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