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AUSCERT External Security Bulletin Redistribution
Google Chrome Stable Channel Update
15 March 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
CVE Names: CVE-2021-21193 CVE-2021-21192 CVE-2021-21191
Comment: Google reports that an exploit for CVE-2021-21193 exists in the wild.
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Stable Channel Update for Desktop
Friday, March 12, 2021
The Stable channel has been updated to 89.0.4389.90 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 5 security fixes. Below, we highlight fixes that were
contributed by external researchers. Please see the Chrome Security Page
for more information.
[$500] High CVE-2021-21191: Use after free in WebRTC. Reported by
raven (@raid_akame) on 2021-01-15
[$TBD] High CVE-2021-21192: Heap buffer overflow in tab groups.
Reported by Abdulrahman Alqabandi, Microsoft Browser Vulnerability Research
[$TBD] High CVE-2021-21193: Use after free in Blink. Reported by
Anonymous on 2021-03-09
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.
Google is aware of reports that an exploit for CVE-2021-21193 exists in the
As usual, our ongoing internal security work was responsible for a wide
range of fixes: Various fixes from internal audits, fuzzing and
Many of our security bugs are detected using AddressSanitizer,
MemorySanitizer, UndefinedBehaviorSanitizer, Control Flow Integrity,
libFuzzer, or AFL.
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