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             AUSCERT External Security Bulletin Redistribution

             Google Chrome: Stable Channel Update for Desktop
                               16 July 2021


        AusCERT Security Bulletin Summary

Product:           Google Chrome
Publisher:         Google
Operating System:  UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Denial of Service               -- Remote with User Interaction
                   Reduced Security                -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-30564 CVE-2021-30563 CVE-2021-30562
                   CVE-2021-30561 CVE-2021-30560 CVE-2021-30559

Original Bulletin: 

Comment: There have been reports that an exploit for CVE-2021-30563 exists in the wild.

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Stable Channel Update for Desktop

Posted: 15 Jul 2021 11:42 AM PDT

The Stable channel has been updated to 91.0.4472.164 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 havent yet fixed.

This update includes 8 security fixes. Below, we highlight fixes that were  
contributed by external researchers. Please see the Chrome Security Page for  
more information.

[$7500][1219082] High CVE-2021-30559: Out of bounds write in ANGLE. 
Reported by Seong-Hwan Park (SeHwa) of SecunologyLab on 2021-06-11

[$5000][1214842] High CVE-2021-30541: Use after free in V8.  
Reported by Richard Wheeldon on 2021-05-31

[$N/A][1219209] High CVE-2021-30560: Use after free in Blink XSLT. Reported by Nick Wellnhofer  
on 2021-06-12

[$TBD][1219630] High CVE-2021-30561: Type Confusion in V8.  
Reported by Sergei Glazunov of Google Project Zero on  

[$TBD][1220078] High CVE-2021-30562: Use after free in WebSerial.  
Reported by Anonymous on 2021-06-15

[$TBD][1228407] High CVE-2021-30563:Type Confusion in V8. Reported by Anonymous on 2021-07-12

[$TBD][1221309] Medium CVE-2021-30564: Heap buffer overflow in WebXR. Reported by Ali  
Merchant, iQ3Connect VR Platform on 2021-06-17

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-2021-30563 exists in the  

As usual, our ongoing internal security work was responsible for a wide  
range of fixes:
[1229408] 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.

Srinivas Sista
Google Chrome

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