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AUSCERT Security Bulletin
ASB-2021.0025
Oracle Java SE Critical Patch Update
21 January 2021
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AusCERT Security Bulletin Summary
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Product: Oracle Java SE
Oracle Java SE Embedded
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Read-only Data Access -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-14803
Member content until: Saturday, February 20 2021
Reference: ASB-2021.0021
ASB-2020.0175
ASB-2020.0174
ESB-2021.0061
ESB-2020.4526
ESB-2020.3772.2
OVERVIEW
Multiple vulnerabilities have been identified in :
o Oracle Java SE, versions 7u281, 8u271
o Oracle Java SE Embedded, version 8u271
[1]
IMPACT
The vendor has provided the following information regarding the
vulnerabilities:
"This Critical Patch Update contains 1 new security patch for Oracle
Java SE. This vulnerability is remotely exploitable without
authentication, i.e., may be exploited over a network without
requiring user credentials." [1]
CVE-2020-14803
5.3 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Supported versions that are affected are Java SE: 7u281 and 8u271;
Java SE Embedded: 8u271. Easily exploitable vulnerability allows
unauthenticated attacker with network access via multiple protocols
to compromise Java SE, Java SE Embedded. Successful attacks of this
vulnerability can result in unauthorized read access to a subset of
Java SE, Java SE Embedded accessible data.
Note : This vulnerability applies to Java deployments that load and
run untrusted code (e.g., code that comes from the internet) and rely
on the Java sandbox for security.
Affects:
o Java SE, Java SE Embedded Java SE: 7u281, 8u271; Java SE
Embedded: 8u271
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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