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AUSCERT Security Bulletin
ASB-2019.0011
Multiple vulnerabilities have been identified in Oracle Database Server
16 January 2019
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AusCERT Security Bulletin Summary
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Product: Oracle Database Server
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2019-2547 CVE-2019-2444 CVE-2019-2406
Member content until: Friday, February 15 2019
OVERVIEW
Multiple vulnerabilities have been identified in :
Oracle Database Server, versions 11.2.0.4, 12.1.0.2, 12.2.0.1,
18c
[1]
IMPACT
The vendor has provided the following information regarding the
vulnerabilities:
"This Critical Patch Update contains 3 new security fixes for the
Oracle Database Server. None of these vulnerabilities may be
remotely exploitable without authentication, i.e., none may be
exploited over a network without requiring user credentials. None
of these fixes are applicable to client-only installations, i.e.,
installations that do not have the Oracle Database Server installed."
[1]
AppendixDB
"CVE-2019-2444
8.2
AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Easily exploitable vulnerability allows low privileged attacker
having Local Logon privilege with logon to the infrastructure where
Core RDBMS executes to compromise Core RDBMS. Successful attacks
require human interaction from a person other than the attacker and
while the vulnerability is in Core RDBMS, attacks may significantly
impact additional products. Successful attacks of this vulnerability
can result in takeover of Core RDBMS.
CVE-2019-2406
7.2
AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Easily exploitable vulnerability allows high privileged attacker
having Create Session, Execute Catalog Role privilege with network
access via Oracle Net to compromise Core RDBMS. Successful attacks
of this vulnerability can result in takeover of Core RDBMS.
CVE-2019-2547
3.5
AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
Easily exploitable vulnerability allows low privileged attacker
having Create Session, Create Procedure privilege with network access
via multiple protocols to compromise Java VM. 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 partial denial of service (partial DOS) of Java
VM." [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 - January 2019
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
[2] Text Form of Oracle Critical Patch Update - January 2019 Risk
Matrices
https://www.oracle.com/technetwork/security-advisory/cpujan2019verbose-5072807.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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