Operating System:

[Win]

Published:

17 December 2021

Protect yourself against future threats.

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                         AUSCERT Security Bulletin

                               ASB-2021.0253
           Microsoft security update release for CVE-2021-44228
                             17 December 2021

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

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

Product:          Azure Spring Cloud
                  Azure Databricks
                  Azure DevOps
Operating System: Windows
Impact/Access:    Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                  Denial of Service               -- Remote/Unauthenticated
Resolution:       Patch/Upgrade
CVE Names:        CVE-2021-45046 CVE-2021-44228 
Reference:        https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-44228

OVERVIEW

        Microsoft is aware of a vulnerability affecting Apache Log4j2 which, if exploited,
        allows an attacker who is able to control log messages or log message
        parameters to execute arbitrary code.[1]


IMPACT

        Microsoft states "Successful exploitation allows for arbitrary code execution in the targeted
        application. Attackers do not need prior access to the system to log the
        string and can remotely cause the logging event by using commands like curl
        against a target system to log the malicious string in the application log.
        
        When processing the log, the vulnerable system reads the string and executes it,
        which in current attacks is used to execute the code from the malicious domain.
        Doing so can grant the attacker full access and control of the affected application." [2]
        
        The following vulnerability has been addressed:
        
         CVE-2021-44228
         CVE-2021-45046


MITIGATION

        It is advised to upgrade the affected products to the latest release.[1]


REFERENCES

        [1] Microsoft update on CVE-2021-44228
            https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-44228

        [2] Guidance on affected products
            https://msrc-blog.microsoft.com/2021/12/11/microsofts-response-to-cve-2021-44228-apache-log4j2/

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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