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AUSCERT Security Bulletin
ASB-2021.0094
Oracle Database Server Critical Patch Updates
21 April 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Oracle Application Express
Oracle Database Server
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Modify Arbitrary Files -- Remote with User Interaction
Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-2245 CVE-2021-2234 CVE-2021-2207
CVE-2021-2175 CVE-2021-2173 CVE-2020-17527
CVE-2020-11023 CVE-2020-7760 CVE-2020-5360
CVE-2019-3740
Reference: ASB-2021.0091
ASB-2021.0086
ASB-2021.0083
ASB-2021.0080
OVERVIEW
Multiple vulnerabilities have been identified in :
o Oracle Application Express, versions prior to 20.2
o Oracle Database Server, versions 12.1.0.2, 12.2.0.1, 18c, 19c
[1]
IMPACT
The vendor has provided the following information regarding the
vulnerabilities:
"This Critical Patch Update contains 10 new security patches plus
additional third party patches noted below for Oracle Database
Products. 4 of these vulnerabilities may be remotely exploitable
without authentication, i.e., may be exploited over a network without
requiring user credentials. None of these patches are applicable to
client-only installations, i.e., installations that do not have the
Oracle Database Server installed." [1]
CVE-2020-5360
7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 12.1.0.2, 12.2.0.1, 18c and
19c. Easily exploitable vulnerability allows unauthenticated attacker
with network access via multiple protocols to compromise the affected
system. Successful attacks of this vulnerability can result in
unauthorized ability to cause a hang or frequently repeatable crash
(complete DOS) of the affected system.
Affects:
o Oracle Database - Enterprise Edition Security (Dell BSAFE Micro
Edition Suite) 12.1.0.2, 12.2.0.1, 18c, 19c
CVE-2020-17527
7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Supported versions that are affected are 18c and 19c. Easily
exploitable vulnerability allows unauthenticated attacker with
network access via HTTP to compromise the affected system. Successful
attacks of this vulnerability can result in unauthorized access to
critical data or complete access to all the affected system's
accessible data.
Affects:
o Workload Manager (Apache Tomcat) 18c, 19c
CVE-2019-3740
6.5 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Supported versions that are affected are 12.1.0.2, 12.2.0.1, 18c and
19c. Easily exploitable vulnerability allows unauthenticated attacker
with network access via Oracle Net to compromise the affected system.
Successful attacks require human interaction from a person other than
the attacker. Successful attacks of this vulnerability can result in
unauthorized access to critical data or complete access to all the
affected system's accessible data.
Affects:
o Oracle Database - Enterprise Edition (Dell BSAFE Crypto-J)
12.1.0.2, 12.2.0.1, 18c, 19c
CVE-2020-11023
6.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
The supported version that is affected is Prior to 20.2. Easily
exploitable vulnerability allows unauthenticated attacker with
network access via HTTP to compromise the affected system. Successful
attacks require human interaction from a person other than the
attacker and while the vulnerability is in the affected system,
attacks may significantly impact additional products. Successful
attacks of this vulnerability can result in unauthorized update,
insert or delete access to some of the affected system's accessible
data as well as unauthorized read access to a subset of the affected
system's accessible data.
Affects:
o Oracle Application Express (jQuery) Prior to 20.2
CVE-2021-2234
5.3 AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
Supported versions that are affected are 12.1.0.2, 12.2.0.1, 18c and
19c. Difficult to exploit vulnerability allows low privileged
attacker having Create Session privilege with network access via
Oracle Net to compromise the affected system. Successful attacks of
this vulnerability can result in unauthorized creation, deletion or
modification access to critical data or all the affected system's
accessible data.
Affects:
o Java VM 12.1.0.2, 12.2.0.1, 18c, 19c
CVE-2020-7760
4.3 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
The supported version that is affected is Prior to 20.2. Easily
exploitable vulnerability allows low privileged attacker having Valid
User Account privilege with network access via HTTP to compromise the
affected system. Successful attacks of this vulnerability can result
in unauthorized ability to cause a partial denial of service (partial
DOS) of the affected system.
Affects:
o Oracle Application Express (CodeMirror) Prior to 20.2
CVE-2021-2173
4.1 AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N
Supported versions that are affected are 12.1.0.2, 12.2.0.1, 18c and
19c. Easily exploitable vulnerability allows high privileged attacker
having DBA Level Account privilege with network access via Oracle Net
to compromise the affected system. While the vulnerability is in the
affected system, attacks may significantly impact additional
products. Successful attacks of this vulnerability can result in
unauthorized read access to a subset of the affected system's
accessible data.
Affects:
o Recovery 12.1.0.2, 12.2.0.1, 18c, 19c
CVE-2021-2175
2.7 AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
Supported versions that are affected are 12.1.0.2, 12.2.0.1, 18c and
19c. Easily exploitable vulnerability allows high privileged attacker
having Create Any View, Select Any View privilege with network access
via Oracle Net to compromise the affected system. Successful attacks
of this vulnerability can result in unauthorized read access to a
subset of the affected system's accessible data.
Affects:
o Database Vault 12.1.0.2, 12.2.0.1, 18c, 19c
CVE-2021-2245
2.7 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Supported versions that are affected are 18c and 19c. Easily
exploitable vulnerability allows high privileged attacker having
Create Audit Policy privilege with network access via Oracle Net to
compromise the affected system. Successful attacks of this
vulnerability can result in unauthorized update, insert or delete
access to some of the affected system's accessible data.
Affects:
o Oracle Database - Enterprise Edition Unified Audit 18c,19c
CVE-2021-2207
2.3 AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Supported versions that are affected are 12.1.0.2, 12.2.0.1, 18c and
19c. Easily exploitable vulnerability allows high privileged attacker
having RMAN executable privilege with logon to the infrastructure
where the affected system executes to compromise the affected system.
Successful attacks of this vulnerability can result in unauthorized
update, insert or delete access to some of the affected system's
accessible data.
Affects:
o Oracle Database - Enterprise Edition 12.1.0.2, 12.2.0.1, 18c,
19c
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.
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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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