-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
                         AUSCERT Security Bulletin

                               ASB-2022.0091
                Oracle Virtualization Critical Patch Update
                               20 April 2022

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

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

Product:          Oracle Secure Global Desktop
                  Oracle VM VirtualBox
Operating System: UNIX variants (UNIX, Linux, OSX)
                  Windows
                  Virtualisation
Resolution:       Patch/Upgrade
CVE Names:        CVE-2022-21491 CVE-2022-21488 CVE-2022-21487
                  CVE-2022-21471 CVE-2022-21465 CVE-2021-40438

Comment: CVSS (Max):  9.0 CVE-2021-40438 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H)
         CVSS Source: NVD
         Calculator:  https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

OVERVIEW

        Multiple vulnerabilities have been identified in :
         o Oracle Secure Global Desktop, version 5.6
         o Oracle VM VirtualBox, versions prior to 6.1.34
        [1]


IMPACT

        The vendor has provided the following information regarding the
        vulnerabilities:
        
        "This Critical Patch Update contains 6 new security patches for
        Oracle Virtualization. 1 of these vulnerabilities may be remotely
        exploitable without authentication, i.e., may be exploited over a
        network without requiring user credentials." [1]
        
        CVE-2021-40438
          9.0 AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
        The supported version that is affected is 5.6. Difficult to exploit
        vulnerability allows unauthenticated attacker with network access via
        HTTP to compromise Oracle Secure Global Desktop. While the
        vulnerability is in Oracle Secure Global Desktop, attacks may
        significantly impact additional products (scope change). Successful
        attacks of this vulnerability can result in takeover of Oracle Secure
        Global Desktop.
         Affects:
         o Oracle Secure Global Desktop 5.6
        
        CVE-2022-21491
          7.8 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
        The supported version that is affected is Prior to 6.1.34. Easily
        exploitable vulnerability allows low privileged attacker with logon
        to the infrastructure where Oracle VM VirtualBox executes to
        compromise Oracle VM VirtualBox. Successful attacks of this
        vulnerability can result in takeover of Oracle VM VirtualBox.
        Note : This vulnerability applies to Windows systems only.
         Affects:
         o Oracle VM VirtualBox Prior to 6.1.34
        
        CVE-2022-21465
          6.7 AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:H
        The supported version that is affected is Prior to 6.1.34. Easily
        exploitable vulnerability allows high privileged attacker with logon
        to the infrastructure where Oracle VM VirtualBox executes to
        compromise Oracle VM VirtualBox. While the vulnerability is in Oracle
        VM VirtualBox, attacks may significantly impact additional products
        (scope change). Successful attacks of this vulnerability can result
        in unauthorized ability to cause a hang or frequently repeatable
        crash (complete DOS) of Oracle VM VirtualBox as well as unauthorized
        update, insert or delete access to some of Oracle VM VirtualBox
        accessible data.
         Affects:
         o Oracle VM VirtualBox Prior to 6.1.34
        
        CVE-2022-21471
          6.5 AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
        The supported version that is affected is Prior to 6.1.34. Easily
        exploitable vulnerability allows low privileged attacker with logon
        to the infrastructure where Oracle VM VirtualBox executes to
        compromise Oracle VM VirtualBox. While the vulnerability is in Oracle
        VM VirtualBox, attacks may significantly impact additional products
        (scope change). Successful attacks of this vulnerability can result
        in unauthorized ability to cause a hang or frequently repeatable
        crash (complete DOS) of Oracle VM VirtualBox.
         Affects:
         o Oracle VM VirtualBox Prior to 6.1.34
        
        CVE-2022-21487
          3.8 AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
        The supported version that is affected is Prior to 6.1.34. Easily
        exploitable vulnerability allows low privileged attacker with logon
        to the infrastructure where Oracle VM VirtualBox executes to
        compromise Oracle VM VirtualBox. While the vulnerability is in Oracle
        VM VirtualBox, attacks may significantly impact additional products
        (scope change). Successful attacks of this vulnerability can result
        in unauthorized read access to a subset of Oracle VM VirtualBox
        accessible data.
         Affects:
         o Oracle VM VirtualBox Prior to 6.1.34
        
        CVE-2022-21488
          3.8 AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N
        The supported version that is affected is Prior to 6.1.34. Easily
        exploitable vulnerability allows low privileged attacker with logon
        to the infrastructure where Oracle VM VirtualBox executes to
        compromise Oracle VM VirtualBox. While the vulnerability is in Oracle
        VM VirtualBox, attacks may significantly impact additional products
        (scope change). Successful attacks of this vulnerability can result
        in unauthorized update, insert or delete access to some of Oracle VM
        VirtualBox accessible data.
         Affects:
         o Oracle VM VirtualBox Prior to 6.1.34


MITIGATION

        Oracle states:
        
        "Due to the threat posed by a successful attack, Oracle strongly
        recommends that customers apply CPU fixes as soon as possible. Until
        you apply the CPU fixes, it may be possible to reduce the risk of
        successful attack by blocking network protocols required by an
        attack. For attacks that require certain privileges or access to
        certain packages, removing the privileges or the ability to access
        the packages from users that do not need the privileges may help
        reduce the risk of successful attack. Both approaches may break
        application functionality, so Oracle strongly recommends that
        customers test changes on non-production systems. Neither approach
        should be considered a long-term solution as neither corrects the
        underlying problem." [1]


REFERENCES

        [1] Oracle Critical Patch Update Advisory - April 2022
            https://www.oracle.com/security-alerts/cpuapr2022.html

        [2] Text Form of Oracle Critical Patch Update - April 2022 Risk
            Matrices
            https://www.oracle.com/security-alerts/cpuapr2022verbose.html

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.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967

iQIVAwUBYl9omONLKJtyKPYoAQgpsg//Tw/QHWFlHq0bbs+omJ+cDOJM4NbP2wdl
0gROzHSjR+biWfWuXioLtyuIpa64eTQeQYr3zt7r+dEnrN0HLavPuJsIYv/lCQ8e
P7LVSa7++S4FJHzUCi2oxYueDbfe7dsvV0nHS/YQHDxqg4SwcvbYqU6vCdqrvHx2
kuOJ9MyPRVlezQhke1WlOMu2YpC4d8B7xJmyewm1jufgw+9LEf5sKvNzpuk8GQ9b
3rHcKMY1A20dccIVnxT6/pMFhExQd2MmbR6uK6S4UdUqGz68kLnuC4s3F13cgRR/
xsSriEu3OuYx6AAcvKE0EQWJ4MeXY1Tf13Qg9e2Uqfb6IDwOCAyVY7B0ek0mLicl
pJU3yYDtYwKu9KXEaNCKRvE7GzAkgnRwv78AX8Kxxe+F0rJmTrDzhEKtLEhtveFG
bks10LCFecLyMBcZHTQ96qPv87kSQXtW5GP4UznhXxXV9FWQj2f5oWBfZj5JnKT+
bBBl6zFJQDXotIfGopyQZesDWAM47xVT/mFAZPDySQeYwnHcs8O2LDlMqYCeCa7U
t5jEeJWbytomndNnu/+zqE7pfON35o64fCaUVvWey6qvTJeciztPp/CzB5oOSdoc
85Np0ZIcN4wakMOFLKuvSvrDaUtD85GpcNd4vAVv5GR6wSrXdIzZwTcT8fUpWjBG
MMh3wKW8bSY=
=D1wv
-----END PGP SIGNATURE-----