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AUSCERT Security Bulletin
ASB-2019.0282
Multiple vulnerabilities have been identified in Oracle Database Server
16 October 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Oracle Database Server
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Modify Arbitrary Files -- Remote/Unauthenticated
Denial of Service -- Remote with User Interaction
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-2956 CVE-2019-2955 CVE-2019-2954
CVE-2019-2940 CVE-2019-2939 CVE-2019-2913
CVE-2019-2909 CVE-2019-2734 CVE-2018-11784
CVE-2018-2875
Member content until: Friday, November 15 2019
Reference: ASB-2019.0213
ASB-2019.0204
ESB-2019.2181
ESB-2019.1843
OVERVIEW
Multiple vulnerabilities have been identified in :
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 10 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-2019-2909
6.8 AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N
Difficult to exploit vulnerability allows unauthenticated attacker
with network access via multiple protocols 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 creation, deletion or
modification access to critical data or all the affected system's
accessible data.
Affects:
o Java VM 11.2.0.4, 12.1.0.2, 12.2.0.1, 18c, 19c
CVE-2019-2956
5.7 AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
Easily exploitable vulnerability allows low privileged attacker
having Create Session privilege with network access via multiple
protocols 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
ability to cause a hang or frequently repeatable crash (complete DOS)
of the affected system.
Affects:
o Core RDBMS (jackson-databind) 12.1.0.2, 12.2.0.1, 18c, 19c
CVE-2019-2913
5.0 AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
Easily exploitable vulnerability allows low privileged attacker
having Create Session privilege with network access via OracleNet 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 Core RDBMS 12.2.0.1, 18c, 19c
CVE-2019-2939
5.0 AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
Easily exploitable vulnerability allows low privileged attacker
having Create Session privilege with network access via OracleNet 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 Core RDBMS 12.2.0.1, 18c, 19c
CVE-2018-2875
5.0 AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
Easily exploitable vulnerability allows low privileged attacker
having Create Session privilege with network access via OracleNet 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 Core RDBMS 12.2.0.1, 18c, 19c
CVE-2019-2734
4.3 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Easily exploitable vulnerability allows low privileged attacker
having Create Session, Execute on DBMS_ADVISOR 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.
Affects:
o Core RDBMS 12.2.0.1, 18c, 19c
CVE-2018-11784
4.3 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
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. 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 WLM (Apache Tomcat) 12.2.0.1, 18c, 19c
CVE-2019-2954
3.9 AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L
Easily exploitable vulnerability allows low privileged attacker
having Create Session, Create Procedure privilege with logon to the
infrastructure where the affected system executes 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 Core RDBMS 11.2.0.4, 12.1.0.2, 12.2.0.1, 18c, 19c
CVE-2019-2955
3.9 AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L
Easily exploitable vulnerability allows low privileged attacker
having Local Logon privilege with logon to the infrastructure where
the affected system executes 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 Core RDBMS 11.2.0.4, 12.1.0.2, 12.2.0.1, 18c, 19c
CVE-2019-2940
2.3 AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Easily exploitable vulnerability allows high privileged attacker
having Create Session 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 Core RDBMS 12.1.0.2, 12.2.0.1, 18c" [2]
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 - October 2019
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
[2] Text Form of Oracle Critical Patch Update - October 2019 Risk
Matrices
https://www.oracle.com/technetwork/security-advisory/cpuoct2019verbose-5072833.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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