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AUSCERT Security Bulletin
ASB-2021.0141
Oracle Virtualization Critical Patch Update
21 July 2021
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AusCERT Security Bulletin Summary
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Product: Oracle Secure Global Desktop
Oracle VM VirtualBox
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Modify Arbitrary Files -- Existing Account
Denial of Service -- Existing Account
Read-only Data Access -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-2454 CVE-2021-2447 CVE-2021-2446
CVE-2021-2443 CVE-2021-2442 CVE-2021-2409
Reference: ASB-2021.0051
ASB-2021.0047
OVERVIEW
Multiple vulnerabilities have been identified in :
o Oracle Secure Global Desktop, version 5.6
o Oracle VM VirtualBox, versions prior to 6.1.24
[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-2021-2447
9.9 AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
The supported version that is affected is 5.6. Easily exploitable
vulnerability allows low privileged attacker with network access via
multiple protocols to compromise Oracle Secure Global Desktop. While
the vulnerability is in Oracle Secure Global Desktop, attacks may
significantly impact additional products. Successful attacks of this
vulnerability can result in takeover of Oracle Secure Global Desktop.
Affects:
o Oracle Secure Global Desktop 5.6
CVE-2021-2446
9.6 AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
The supported version that is affected is 5.6. Easily exploitable
vulnerability allows unauthenticated attacker with network access via
multiple protocols to compromise Oracle Secure Global Desktop.
Successful attacks require human interaction from a person other than
the attacker and while the vulnerability is in Oracle Secure Global
Desktop, attacks may significantly impact additional products.
Successful attacks of this vulnerability can result in takeover of
Oracle Secure Global Desktop.
Affects:
o Oracle Secure Global Desktop 5.6
CVE-2021-2409
8.2 AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
The supported version that is affected is Prior to 6.1.24. 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.
Successful attacks of this vulnerability can result in takeover of
Oracle VM VirtualBox.
Affects:
o Oracle VM VirtualBox Prior to 6.1.24
CVE-2021-2443
7.3 AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:H
The supported version that is affected is Prior to 6.1.24. 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.
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 and
unauthorized read access to a subset of Oracle VM VirtualBox
accessible data.
Note : This vulnerability applies to Solaris x86 and Linux systems
only.
Affects:
o Oracle VM VirtualBox Prior to 6.1.24
CVE-2021-2454
7.0 AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
The supported version that is affected is Prior to 6.1.24. Difficult
to exploit 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.
Affects:
o Oracle VM VirtualBox Prior to 6.1.24
CVE-2021-2442
6.0 AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
The supported version that is affected is Prior to 6.1.24. 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.
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 6.1.24
MITIGATION
"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 - July 2021
https://www.oracle.com/security-alerts/cpujul2021.html
[2] Text Form of Oracle Critical Patch Update - July 2021 Risk Matrices
https://www.oracle.com/security-alerts/cpujul2021verbose.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.
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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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