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AUSCERT Security Bulletin
ASB-2021.0214
Oracle Siebel CRM Critical Patch Update
20 October 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Oracle Siebel Applications
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-28165 CVE-2021-26272 CVE-2021-25122
CVE-2020-9488 CVE-2020-9484 CVE-2016-2183
Reference: ASB-2021.0211
ASB-2021.0208
ASB-2021.0204
ASB-2021.0203
ASB-2021.0200
ESB-2021.0742
ESB-2020.2046
OVERVIEW
Multiple vulnerabilities have been identified in :
o Siebel Applications, versions 21.9 and prior
[1]
IMPACT
The vendor has provided the following information regarding the
vulnerabilities:
"This Critical Patch Update contains 6 new security patches for
Oracle Siebel CRM. 5 of these vulnerabilities may be remotely
exploitable without authentication, i.e., may be exploited over a
network without requiring user credentials." [1]
CVE-2021-28165
7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 21.9 and prior. Easily
exploitable vulnerability allows unauthenticated attacker with
network access via TLS to compromise Siebel Core - Automation.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of Siebel Core - Automation.
Affects:
o Siebel Core - Automation 21.9 and prior
CVE-2021-25122
7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Supported versions that are affected are 21.9 and prior. Easily
exploitable vulnerability allows unauthenticated attacker with
network access via HTTP to compromise Siebel UI Framework. Successful
attacks of this vulnerability can result in unauthorized access to
critical data or complete access to all Siebel UI Framework
accessible data.
Affects:
o Siebel UI Framework 21.9 and prior
CVE-2016-2183
7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Supported versions that are affected are 21.9 and prior. Easily
exploitable vulnerability allows unauthenticated attacker with
network access via TLS to compromise Siebel UI Framework. Successful
attacks of this vulnerability can result in unauthorized access to
critical data or complete access to all Siebel UI Framework
accessible data.
Affects:
o Siebel UI Framework 21.9 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 21.9 and prior. Difficult to
exploit vulnerability allows low privileged attacker with logon to
the infrastructure where Siebel Apps - Marketing executes to
compromise Siebel Apps - Marketing. Successful attacks of this
vulnerability can result in takeover of Siebel Apps - Marketing.
Affects:
o Siebel Apps - Marketing 21.9 and prior
CVE-2021-26272
6.5 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Supported versions that are affected are 21.9 and prior. Easily
exploitable vulnerability allows unauthenticated attacker with
network access via HTTP to compromise Siebel UI Framework. 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 Siebel UI Framework.
Affects:
o Siebel UI Framework 21.9 and prior
CVE-2020-9488
3.7 AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Supported versions that are affected are 21.9 and prior. Difficult to
exploit vulnerability allows unauthenticated attacker with network
access via HTTP to compromise Siebel Apps - Marketing. Successful
attacks of this vulnerability can result in unauthorized read access
to a subset of Siebel Apps - Marketing accessible data.
Affects:
o Siebel Apps - Marketing 21.9 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 - October 2021
https://www.oracle.com/security-alerts/cpuoct2021.html
[2] Text Form of Oracle Critical Patch Update - October 2021 Risk
Matrices
https://www.oracle.com/security-alerts/cpuoct2021verbose.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.
===========================================================================
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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