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AUSCERT Security Bulletin
ASB-2020.0074
Oracle Database Sever
15 April 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Oracle Application Express
Oracle Database Server
Operating System: UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Modify Arbitrary Files -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Read-only Data Access -- Remote with User Interaction
Access Confidential Data -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2020-2737 CVE-2020-2735 CVE-2020-2734
CVE-2020-2514 CVE-2019-17563 CVE-2019-2853
CVE-2016-10251 CVE-2016-7103
Member content until: Friday, May 15 2020
Reference: ASB-2020.0073
ESB-2020.0294
ASB-2019.0289
ASB-2019.0117
ESB-2019.4714
OVERVIEW
Multiple vulnerabilities have been identified in :
o Oracle Application Express, versions prior to 19.2
o Oracle Database Server, versions 11.2.0.4, 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 8 new security patches for the
Oracle Database Server. 2 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-2020-2735
8.0 AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H ( legend ) [ Advisory
Supported versions that are affected are 11.2.0.4, 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 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 takeover of the affected
system.
Affects:
o Java VM 11.2.0.4, 12.1.0.2, 12.2.0.1, 18c, 19c
CVE-2016-10251
8.0 AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H ( legend ) [ Advisory
The supported version that is affected is 12.1.0.2. Easily
exploitable vulnerability allows low privileged attacker having
Create Session privilege 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 takeover of the affected system.
Affects:
o Oracle Multimedia 12.1.0.2
CVE-2019-17563
7.5 AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H ( legend ) [ Advisory
Supported versions that are affected are 12.2.0.1, 18c and 19c.
Difficult to exploit vulnerability allows unauthenticated attacker
with network access via HTTPS 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
takeover of the affected system.
Affects:
o WLM (Apache Tomcat) 12.2.0.1, 18c, 19c
CVE-2020-2737
6.4 AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H ( legend ) [ Advisory
Supported versions that are affected are 11.2.0.4, 12.1.0.2,
12.2.0.1, 18c and 19c. Difficult to exploit vulnerability allows high
privileged attacker having Create Session, Execute Catalog Role
privilege 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 takeover of the affected system.
Affects:
o Core RDBMS 11.2.0.4, 12.1.0.2, 12.2.0.1, 18c, 19c
CVE-2019-2853
6.3 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L ( legend ) [ Advisory
Supported versions that are affected are 11.2.0.4, 12.1.0.2,
12.2.0.1, 18c and 19c. Easily exploitable vulnerability allows low
privileged attacker having Create Session privilege with network
access via OracleNet 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 as well as unauthorized read access to a subset of the affected
system's accessible data and unauthorized ability to cause a partial
denial of service (partial DOS) of the affected system.
Affects:
o Oracle Text 11.2.0.4, 12.1.0.2, 12.2.0.1, 18c, 19c
CVE-2016-7103
6.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N ( legend ) [ Advisory
The supported version that is affected is Prior to 19.1. Easily
exploitable vulnerability allows unauthenticated attacker with
network access via HTTPS 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 Prior to 19.1
CVE-2020-2514
4.6 AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L ( legend ) [ Advisory
The supported version that is affected is Prior to 19.2. Easily
exploitable vulnerability allows low privileged attacker having End
User Role privilege with network access via HTTPS 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 update, insert or delete
access to some of the affected system's accessible data and
unauthorized ability to cause a partial denial of service (partial
DOS) of the affected system.
Affects:
o Oracle Application Express Prior to 19.2
CVE-2020-2734
2.4 AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:N ( legend ) [ Advisory
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 Execute on DBMS_SQLTUNE privilege 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
read access to a subset of the affected system's accessible data.
Affects:
o RDBMS/Optimizer 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 2020
https://www.oracle.com/security-alerts/cpuapr2020.html
[2] Text Form of Oracle Critical Patch Update - April 2020 Risk
Matrices
https://www.oracle.com/security-alerts/cpuapr2020verbose.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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