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AUSCERT Security Bulletin
ASB-2021.0021
Oracle GraalVM Critical Patch Update
21 January 2021
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AusCERT Security Bulletin Summary
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Product: Oracle GraalVM Enterprise Edition
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2020-14803 CVE-2020-8277
Member content until: Saturday, February 20 2021
Reference: ASB-2020.0175
ASB-2020.0174
ESB-2021.0112
ESB-2021.0061
OVERVIEW
Multiple vulnerabilities have been identified in :
o Oracle GraalVM Enterprise Edition, versions 19.3.4, 20.3.0
[1]
IMPACT
The vendor has provided the following information regarding the
vulnerabilities:
"This Critical Patch Update contains 2 new security patches for
Oracle GraalVM. Both of these vulnerabilities may be remotely
exploitable without authentication, i.e., may be exploited over a
network without requiring user credentials." [1]
CVE-2020-8277
7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 19.3.4 and 20.3.0. Easily
exploitable vulnerability allows unauthenticated attacker with
network access via HTTP to compromise Oracle GraalVM Enterprise
Edition. Successful attacks of this vulnerability can result in
unauthorized ability to cause a hang or frequently repeatable crash
(complete DOS) of Oracle GraalVM Enterprise Edition.
Affects:
o Oracle GraalVM Enterprise Edition 19.3.4, 20.3.0
CVE-2020-14803
5.3 AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
Supported versions that are affected are 19.3.4 and 20.3.0. Difficult
to exploit vulnerability allows unauthenticated attacker with network
access via multiple protocols to compromise Oracle GraalVM Enterprise
Edition. Successful attacks require human interaction from a person
other than the attacker. Successful attacks of this vulnerability can
result in unauthorized creation, deletion or modification access to
critical data or all Oracle GraalVM Enterprise Edition accessible
data.
Affects:
o Oracle GraalVM Enterprise Edition 19.3.4, 20.3.0
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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