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AUSCERT Security Bulletin
ASB-2021.0030
Oracle Siebel CRM Critical Patch Update
21 January 2021
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AusCERT Security Bulletin Summary
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Product: Siebel Applications
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Modify Arbitrary Files -- Remote with User Interaction
Access Confidential Data -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2021-2039 CVE-2021-2004 CVE-2020-11022
CVE-2020-9484
Member content until: Saturday, February 20 2021
Reference: ASB-2021.0023
ASB-2021.0020
ASB-2021.0017
ESB-2020.4248
ESB-2020.1793
OVERVIEW
Multiple vulnerabilities have been identified in :
o Siebel Applications, versions 20.12 and prior
[1]
IMPACT
The vendor has provided the following information regarding the
vulnerabilities:
"This Critical Patch Update contains 4 new security patches for
Oracle Siebel CRM. 1 of these vulnerabilities may be remotely
exploitable without authentication, i.e., may be exploited over a
network without requiring user credentials." [1]
CVE-2021-2039
7.6 AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
Supported versions that are affected are 20.12 and prior. Easily
exploitable vulnerability allows low privileged attacker with network
access via HTTP to compromise Siebel Core - Server Framework.
Successful attacks require human interaction from a person other than
the attacker and while the vulnerability is in Siebel Core - Server
Framework, attacks may significantly impact additional products.
Successful attacks of this vulnerability can result in unauthorized
access to critical data or complete access to all Siebel Core -
Server Framework accessible data as well as unauthorized update,
insert or delete access to some of Siebel Core - Server Framework
accessible data.
Affects:
o Siebel Core - Server Framework 20.12 and prior
CVE-2020-9484
7.0 AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Supported versions that are affected are 20.12 and prior. Difficult
to exploit vulnerability allows low privileged attacker with logon to
the infrastructure where Siebel UI Framework executes to compromise
Siebel UI Framework. Successful attacks of this vulnerability can
result in takeover of Siebel UI Framework.
Affects:
o Siebel UI Framework 20.12 and prior
CVE-2020-11022
6.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Supported versions that are affected are 20.12 and prior. Easily
exploitable vulnerability allows unauthenticated attacker with
network access via HTTP to compromise Siebel Mobile App. Successful
attacks require human interaction from a person other than the
attacker and while the vulnerability is in Siebel Mobile App, attacks
may significantly impact additional products. Successful attacks of
this vulnerability can result in unauthorized update, insert or
delete access to some of Siebel Mobile App accessible data as well as
unauthorized read access to a subset of Siebel Mobile App accessible
data.
Affects:
o Siebel Mobile App 20.12 and prior
CVE-2021-2004
4.3 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Supported versions that are affected are 20.12 and prior. Easily
exploitable vulnerability allows low privileged attacker with network
access via HTTP to compromise Siebel Core - Server BizLogic Script.
Successful attacks of this vulnerability can result in unauthorized
read access to a subset of Siebel Core - Server BizLogic Script
accessible data.
Affects:
o Siebel Core - Server BizLogic Script 20.12 and prior
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 2021
https://www.oracle.com/security-alerts/cpujan2021.html
[2] Text Form of Oracle Critical Patch Update - January 2021 Risk
Matrices
https://www.oracle.com/security-alerts/cpujan2021verbose.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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