Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT Security Bulletin
ASB-2021.0067
Oracle Systems Critical Patch Update
21 April 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Oracle Solaris
Oracle ZFS Storage Appliance Kit
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Root Compromise -- Remote/Unauthenticated
Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Modify Arbitrary Files -- Existing Account
Denial of Service -- Existing Account
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-2192 CVE-2021-2167 CVE-2021-2149
CVE-2021-2147 CVE-2020-1472
Reference: ASB-2020.0140
ESB-2020.3239
OVERVIEW
Multiple vulnerabilities have been identified in :
o Oracle Solaris, versions 10, 11
o Oracle ZFS Storage Appliance Kit, version 8.8
[1]
IMPACT
The vendor has provided the following information regarding the
vulnerabilities:
"This Critical Patch Update contains 5 new security patches for
Oracle Systems. 1 of these vulnerabilities may be remotely
exploitable without authentication, i.e., may be exploited over a
network without requiring user credentials." [1]
CVE-2021-2167
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 10. Easily exploitable
vulnerability allows low privileged attacker with logon to the
infrastructure where Oracle Solaris executes to compromise Oracle
Solaris. Successful attacks of this vulnerability can result in
takeover of Oracle Solaris.
Affects:
o Oracle Solaris 10
CVE-2021-2192
6.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
The supported version that is affected is 11. Easily exploitable
vulnerability allows low privileged attacker with logon to the
infrastructure where Oracle Solaris executes to compromise Oracle
Solaris. Successful attacks of this vulnerability can result in
unauthorized ability to cause a hang or frequently repeatable crash
(complete DOS) of Oracle Solaris as well as unauthorized update,
insert or delete access to some of Oracle Solaris accessible data.
Note : This vulnerability applies to Oracle Solaris on SPARC systems
only.
Affects:
o Oracle Solaris 11
CVE-2021-2149
2.5 AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
The supported version that is affected is 8.8. Difficult to exploit
vulnerability allows low privileged attacker with logon to the
infrastructure where Oracle ZFS Storage Appliance Kit executes to
compromise Oracle ZFS Storage Appliance Kit. Successful attacks of
this vulnerability can result in unauthorized update, insert or
delete access to some of Oracle ZFS Storage Appliance Kit accessible
data.
Affects:
o Oracle ZFS Storage Appliance Kit 8.8
CVE-2020-1472
10.0 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
The supported version that is affected is 8.8. Easily exploitable
vulnerability allows unauthenticated attacker with network access via
multiple protocols to compromise Oracle ZFS Storage Appliance Kit.
While the vulnerability is in Oracle ZFS Storage Appliance Kit,
attacks may significantly impact additional products. Successful
attacks of this vulnerability can result in takeover of Oracle ZFS
Storage Appliance Kit.
Affects:
o Oracle ZFS Storage Appliance Kit 8.8
CVE-2021-2147
1.8 AV:L/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:N
The supported version that is affected is 8.8. Difficult to exploit
vulnerability allows high privileged attacker with logon to the
infrastructure where Oracle ZFS Storage Appliance Kit executes to
compromise Oracle ZFS Storage Appliance Kit. Successful attacks
require human interaction from a person other than the attacker.
Successful attacks of this vulnerability can result in unauthorized
update, insert or delete access to some of Oracle ZFS Storage
Appliance Kit accessible data.
Affects:
o Oracle ZFS Storage Appliance Kit 8.8
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 2021
https://www.oracle.com/security-alerts/cpuapr2021.html
[2] Text Form of Oracle Critical Patch Update - April 2021 Risk
Matrices
https://www.oracle.com/security-alerts/cpuapr2021verbose.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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=zExQ
-----END PGP SIGNATURE-----