Operating System:

[Win]

Published:

30 April 2021

Protect yourself against future threats.

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                         AUSCERT Security Bulletin

                               ASB-2021.0100
   Microsoft Security Update Release for Microsoft Edge (Chromium-based)
                               30 April 2021

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:          Microsoft Edge
Operating System: Windows
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
Resolution:       Patch/Upgrade
CVE Names:        CVE-2021-21233 CVE-2021-21232 CVE-2021-21231
                  CVE-2021-21230 CVE-2021-21229 CVE-2021-21228
                  CVE-2021-21227  
Reference:        ESB-2021.1426

OVERVIEW

        The following Chrome CVEs have been released on April 29, 2021.
        
        These CVE were assigned by Chrome. Microsoft Edge (Chromium-based)
        ingests Chromium, which addresses these vulnerabilities. Please see 
        Google Chrome Releases for more information. [1]
        
        Edge version: 90.0.818.51
        Chromium version: 90.0.4430.93 [2]


IMPACT

        The following vulnerabilities have been addressed:
                
        * CVE-2021-21227
        * CVE-2021-21228
        * CVE-2021-21229
        * CVE-2021-21230
        * CVE-2021-21231
        * CVE-2021-21232
        * CVE-2021-21233
        
        See Security Update Guide Supports CVEs Assigned by Industry Partners
        for more information about third-party CVEs in the Security Update Guide. [3]


MITIGATION

        It is advised to update Edge to the latest release.


REFERENCES

        [1] Google Chrome Releases
            https://chromereleases.googleblog.com/2021

        [2] Security Update Guide
            https://msrc.microsoft.com/update-guide/en-us

        [3] Security Update Guide Supports CVEs Assigned by Industry Partners
            https://msrc-blog.microsoft.com/2021/01/13/security-update-guide-supports-cves-assigned-by-industry-partners/

AusCERT has made every effort to ensure that the information contained
in this document is accurate.  However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours 
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
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