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AUSCERT External Security Bulletin Redistribution
Google Chrome Stable Channel Update for Desktop
27 April 2021
AusCERT Security Bulletin Summary
Product: Google Chrome
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
Unauthorised Access -- Remote with User Interaction
Reduced Security -- Remote with User Interaction
CVE Names: CVE-2021-21233 CVE-2021-21232 CVE-2021-21231
CVE-2021-21230 CVE-2021-21229 CVE-2021-21228
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Stable Channel Update for Desktop
Monday, April 26, 2021
The Stable channel has been updated to 90.0.4430.93 for Windows, Mac and Linux
which will roll out over the coming days/weeks.
A full list of changes in this build is available in the log. Interested in
switching release channels? Find out how here. If you find a new issue, please
let us know by filing a bug. The community help forum is also a great place to
reach out for help or learn about common issues.
Security Fixes and Rewards
Note: Access to bug details and links may be kept restricted until a majority
of users are updated with a fix. We will also retain restrictions if the bug
exists in a third party library that other projects similarly depend on, but
haven't yet fixed.
This update includes 9 security fixes. Below, we highlight fixes that were
contributed by external researchers. Please see the Chrome Security Page for
[$15000] High CVE-2021-21227: Insufficient data validation in V8.
Reported by Gengming Liu of Singular Security Lab on 2021-04-15
[$NA] High CVE-2021-21232: Use after free in Dev Tools. Reported by
Abdulrahman Alqabandi, Microsoft Browser Vulnerability Research on 2021-02-05
[$TBD] High CVE-2021-21233: Heap buffer overflow in ANGLE. Reported by
Omair on 2021-02-26
[$5000] Medium CVE-2021-21228: Insufficient policy enforcement in
extensions. Reported by Rob Wu on 2020-10-16
[$TBD] Medium CVE-2021-21229: Incorrect security UI in downloads.
Reported by Mohit Raj (shadow2639) on 2021-04-12
[$TBD] Medium CVE-2021-21230: Type Confusion in V8. Reported by
Manfred Paul on 2021-04-13
[$NA] Low CVE-2021-21231: Insufficient data validation in V8. Reported
by Sergei Glazunov of Google Project Zero on 2021-04-13
We would also like to thank all security researchers that worked with us during
the development cycle to prevent security bugs from ever reaching the stable
channel.As usual, our ongoing internal security work was responsible for a wide
range of fixes:
o  Various fixes from internal audits, fuzzing and other initiatives
Many of our security bugs are detected using AddressSanitizer, MemorySanitizer,
UndefinedBehaviorSanitizer, Control Flow Integrity, libFuzzer, or AFL.
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