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AUSCERT Security Bulletin
ASB-2021.0138
Oracle MySQL Critical Patch Update
21 July 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: MySQL Cluster
MySQL Connectors
MySQL Enterprise Monitor
MySQL Server
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Modify Arbitrary Files -- Existing Account
Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-25122 CVE-2021-22901 CVE-2021-22884
CVE-2021-3450 CVE-2021-2444 CVE-2021-2441
CVE-2021-2440 CVE-2021-2437 CVE-2021-2429
CVE-2021-2427 CVE-2021-2426 CVE-2021-2425
CVE-2021-2424 CVE-2021-2422 CVE-2021-2418
CVE-2021-2417 CVE-2021-2412 CVE-2021-2411
CVE-2021-2410 CVE-2021-2402 CVE-2021-2399
CVE-2021-2390 CVE-2021-2389 CVE-2021-2387
CVE-2021-2385 CVE-2021-2384 CVE-2021-2383
CVE-2021-2374 CVE-2021-2372 CVE-2021-2370
CVE-2021-2367 CVE-2021-2357 CVE-2021-2356
CVE-2021-2354 CVE-2021-2352 CVE-2021-2342
CVE-2021-2340 CVE-2021-2339 CVE-2019-17543
Reference: ASB-2021.0135
ASB-2021.0076
ESB-2021.2408
ESB-2021.2381
ESB-2021.2380
OVERVIEW
Multiple vulnerabilities have been identified in :
o MySQL Cluster, versions 8.0.25 and prior
o MySQL Connectors, versions 8.0.23 and prior
o MySQL Enterprise Monitor, versions 8.0.23 and prior
o MySQL Server, versions 5.7.34 and prior, 8.0.25 and prior
[1]
IMPACT
The vendor has provided the following information regarding the
vulnerabilities:
"This Critical Patch Update contains 41 new security patches for
Oracle MySQL. 10 of these vulnerabilities may be remotely exploitable
without authentication, i.e., may be exploited over a network without
requiring user credentials." [1]
CVE-2021-22884
8.8 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Supported versions that are affected are 8.0.25 and prior. Easily
exploitable vulnerability allows unauthenticated attacker with
network access via multiple protocols to compromise MySQL Cluster.
Successful attacks require human interaction from a person other than
the attacker. Successful attacks of this vulnerability can result in
takeover of MySQL Cluster.
Affects:
o MySQL Cluster 8.0.25 and prior
CVE-2021-22901
8.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Supported versions that are affected are 5.7.34 and prior and 8.0.25
and prior. Difficult to exploit vulnerability allows unauthenticated
attacker with network access via multiple protocols to compromise
MySQL Server. Successful attacks of this vulnerability can result in
takeover of MySQL Server.
Affects:
o MySQL Server 5.7.34 and prior, 8.0.25 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 8.0.23 and prior. Easily
exploitable vulnerability allows unauthenticated attacker with
network access via HTTPS/2 to compromise MySQL Enterprise Monitor.
Successful attacks of this vulnerability can result in unauthorized
access to critical data or complete access to all MySQL Enterprise
Monitor accessible data.
Affects:
o MySQL Enterprise Monitor 8.0.23 and prior
CVE-2019-17543
7.5 AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Supported versions that are affected are 5.7.34 and prior and 8.0.25
and prior. Difficult to exploit vulnerability allows low privileged
attacker with network access via multiple protocols to compromise
MySQL Server. Successful attacks of this vulnerability can result in
takeover of MySQL Server.
Affects:
o MySQL Server 5.7.34 and prior, 8.0.25 and prior
[WARNING] Found details of CVE vary depending upon products
CVE-2021-3450
7.4 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Supported versions that are affected are 8.0.23 and prior. Difficult
to exploit vulnerability allows unauthenticated attacker with network
access via multiple protocols to compromise MySQL Connectors.
Successful attacks of this vulnerability can result in unauthorized
creation, deletion or modification access to critical data or all
MySQL Connectors accessible data as well as unauthorized access to
critical data or complete access to all MySQL Connectors accessible
data.
Affects:
o MySQL Connectors 8.0.23 and prior
o MySQL Connectors 8.0.23 and prior
o MySQL Enterprise Monitor 8.0.23 and prior
CVE-2021-2417
6.0 AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:H
Supported versions that are affected are 8.0.25 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of MySQL Server as well as unauthorized update, insert or delete
access to some of MySQL Server accessible data and unauthorized read
access to a subset of MySQL Server accessible data.
Affects:
o MySQL Server 8.0.25 and prior
CVE-2021-2389
5.9 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 5.7.34 and prior and 8.0.25
and prior. Difficult to exploit vulnerability allows unauthenticated
attacker with network access via multiple protocols to compromise
MySQL Server. Successful attacks of this vulnerability can result in
unauthorized ability to cause a hang or frequently repeatable crash
(complete DOS) of MySQL Server.
Affects:
o MySQL Server 5.7.34 and prior, 8.0.25 and prior
CVE-2021-2390
5.9 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 5.7.34 and prior and 8.0.25
and prior. Difficult to exploit vulnerability allows unauthenticated
attacker with network access via multiple protocols to compromise
MySQL Server. Successful attacks of this vulnerability can result in
unauthorized ability to cause a hang or frequently repeatable crash
(complete DOS) of MySQL Server.
Affects:
o MySQL Server 5.7.34 and prior, 8.0.25 and prior
CVE-2021-2429
5.9 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 8.0.25 and prior. Difficult
to exploit vulnerability allows unauthenticated attacker with network
access via multiple protocols to compromise MySQL Server. Successful
attacks of this vulnerability can result in unauthorized ability to
cause a hang or frequently repeatable crash (complete DOS) of MySQL
Server.
Affects:
o MySQL Server 8.0.25 and prior
CVE-2021-2356
5.9 AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H
Supported versions that are affected are 5.7.34 and prior and 8.0.25
and prior. Difficult to exploit vulnerability allows low privileged
attacker with network access via multiple protocols to compromise
MySQL Server. Successful attacks of this vulnerability can result in
unauthorized ability to cause a hang or frequently repeatable crash
(complete DOS) of MySQL Server as well as unauthorized update, insert
or delete access to some of MySQL Server accessible data.
Affects:
o MySQL Server 5.7.34 and prior, 8.0.25 and prior
CVE-2021-2385
5.0 AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H
Supported versions that are affected are 5.7.34 and prior and 8.0.25
and prior. Difficult to exploit vulnerability allows high privileged
attacker with network access via multiple protocols to compromise
MySQL Server. Successful attacks of this vulnerability can result in
unauthorized ability to cause a hang or frequently repeatable crash
(complete DOS) of MySQL Server as well as unauthorized update, insert
or delete access to some of MySQL Server accessible data.
Affects:
o MySQL Server 5.7.34 and prior, 8.0.25 and prior
CVE-2021-2339
4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 8.0.25 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of MySQL Server.
Affects:
o MySQL Server 8.0.25 and prior
CVE-2021-2352
4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 8.0.25 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of MySQL Server.
Affects:
o MySQL Server 8.0.25 and prior
CVE-2021-2399
4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 8.0.25 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of MySQL Server.
Affects:
o MySQL Server 8.0.25 and prior
CVE-2021-2370
4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 8.0.25 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of MySQL Server.
Affects:
o MySQL Server 8.0.25 and prior
CVE-2021-2440
4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 8.0.25 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of MySQL Server.
Affects:
o MySQL Server 8.0.25 and prior
CVE-2021-2354
4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 8.0.25 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of MySQL Server.
Affects:
o MySQL Server 8.0.25 and prior
CVE-2021-2402
4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 8.0.25 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of MySQL Server.
Affects:
o MySQL Server 8.0.25 and prior
CVE-2021-2342
4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 5.7.34 and prior and 8.0.25
and prior. Easily exploitable vulnerability allows high privileged
attacker with network access via multiple protocols to compromise
MySQL Server. Successful attacks of this vulnerability can result in
unauthorized ability to cause a hang or frequently repeatable crash
(complete DOS) of MySQL Server.
Affects:
o MySQL Server 5.7.34 and prior, 8.0.25 and prior
CVE-2021-2357
4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 8.0.25 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of MySQL Server.
Affects:
o MySQL Server 8.0.25 and prior
CVE-2021-2367
4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 8.0.25 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of MySQL Server.
Affects:
o MySQL Server 8.0.25 and prior
CVE-2021-2412
4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 8.0.21 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of MySQL Server.
Affects:
o MySQL Server 8.0.21 and prior
CVE-2021-2383
4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 8.0.25 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of MySQL Server.
Affects:
o MySQL Server 8.0.25 and prior
CVE-2021-2384
4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 8.0.25 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of MySQL Server.
Affects:
o MySQL Server 8.0.25 and prior
CVE-2021-2387
4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 8.0.25 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of MySQL Server.
Affects:
o MySQL Server 8.0.25 and prior
CVE-2021-2444
4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 8.0.23 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of MySQL Server.
Affects:
o MySQL Server 8.0.23 and prior
CVE-2021-2410
4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 8.0.25 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of MySQL Server.
Affects:
o MySQL Server 8.0.25 and prior
CVE-2021-2418
4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 8.0.25 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of MySQL Server.
Affects:
o MySQL Server 8.0.25 and prior
CVE-2021-2425
4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 8.0.25 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of MySQL Server.
Affects:
o MySQL Server 8.0.25 and prior
CVE-2021-2426
4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 8.0.25 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of MySQL Server.
Affects:
o MySQL Server 8.0.25 and prior
CVE-2021-2427
4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 8.0.25 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of MySQL Server.
Affects:
o MySQL Server 8.0.25 and prior
CVE-2021-2437
4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 8.0.25 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of MySQL Server.
Affects:
o MySQL Server 8.0.25 and prior
CVE-2021-2441
4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 8.0.25 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of MySQL Server.
Affects:
o MySQL Server 8.0.25 and prior
CVE-2021-2422
4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 8.0.25 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of MySQL Server.
Affects:
o MySQL Server 8.0.25 and prior
CVE-2021-2424
4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 8.0.25 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a hang or frequently repeatable crash (complete DOS)
of MySQL Server.
Affects:
o MySQL Server 8.0.25 and prior
CVE-2021-2372
4.4 AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
Supported versions that are affected are 5.7.34 and prior and 8.0.25
and prior. Difficult to exploit vulnerability allows high privileged
attacker with network access via multiple protocols to compromise
MySQL Server. Successful attacks of this vulnerability can result in
unauthorized ability to cause a hang or frequently repeatable crash
(complete DOS) of MySQL Server.
Affects:
o MySQL Server 5.7.34 and prior, 8.0.25 and prior
CVE-2021-2374
4.1 AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N
Supported versions that are affected are 8.0.25 and prior. Difficult
to exploit vulnerability allows high privileged attacker with logon
to the infrastructure where MySQL Server executes to compromise MySQL
Server. Successful attacks of this vulnerability can result in
unauthorized access to critical data or complete access to all MySQL
Server accessible data.
Affects:
o MySQL Server 8.0.25 and prior
CVE-2021-2411
3.7 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Supported versions that are affected are 8.0.25 and prior. Difficult
to exploit vulnerability allows unauthenticated attacker with network
access via multiple protocols to compromise MySQL Cluster. Successful
attacks of this vulnerability can result in unauthorized ability to
cause a partial denial of service (partial DOS) of MySQL Cluster.
Affects:
o MySQL Cluster 8.0.25 and prior
CVE-2021-2340
2.7 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L
Supported versions that are affected are 8.0.25 and prior. Easily
exploitable vulnerability allows high privileged attacker with
network access via multiple protocols to compromise MySQL Server.
Successful attacks of this vulnerability can result in unauthorized
ability to cause a partial denial of service (partial DOS) of MySQL
Server.
Affects:
o MySQL Server 8.0.25 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 - July 2021
https://www.oracle.com/security-alerts/cpujul2021.html
[2] Text Form of Oracle Critical Patch Update - July 2021 Risk Matrices
https://www.oracle.com/security-alerts/cpujul2021verbose.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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