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                         AUSCERT Security Bulletin

                               ASB-2022.0148
                   Oracle Systems Critical Patch Update
                               20 July 2022

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:          Oracle Solaris
                  Oracle ZFS Storage Appliance Kit
Operating System: UNIX variants (UNIX, Linux, OSX)
                  Solaris
                  Network Appliance
Resolution:       Patch/Upgrade
CVE Names:        CVE-2022-24801 CVE-2022-21563 CVE-2022-21533
                  CVE-2022-21524 CVE-2022-21514 CVE-2022-21513
                  CVE-2022-21439  

Comment: CVSS (Max):  8.2* CVE-2022-21513 (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H)
         CVSS Source: Oracle, [NVD]
         Calculator:  https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
         * Not all CVSS available when published

OVERVIEW

        Multiple vulnerabilities have been identified in :
         o Oracle Solaris, versions 10, 11
         o Oracle ZFS Storage Appliance Kit, version 8.8
        [1]


IMPACT

        The vendor has provided the following information regarding the
        vulnerabilities:
        
        "This Critical Patch Update contains 7 new security patches for
        Oracle Systems. 2 of these vulnerabilities may be remotely
        exploitable without authentication, i.e., may be exploited over a
        network without requiring user credentials." [1]
        
        "CVE-2022-21513
          8.2 AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
        The supported version that is affected is 8.8. Easily exploitable
        vulnerability allows high privileged attacker with logon to the
        infrastructure where Oracle ZFS Storage Appliance Kit executes to
        compromise Oracle ZFS Storage Appliance Kit. While the vulnerability
        is in Oracle ZFS Storage Appliance Kit, attacks may significantly
        impact additional products (scope change). Successful attacks of this
        vulnerability can result in takeover of Oracle ZFS Storage Appliance
        Kit.
         Affects:
         o Oracle ZFS Storage Appliance Kit 8.8
        
        CVE-2022-24801
          8.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
        The supported version that is affected is 8.8. Difficult to exploit
        vulnerability allows unauthenticated attacker with network access via
        multiple protocols to compromise Oracle ZFS Storage Appliance Kit.
        Successful attacks of this vulnerability can result in takeover of
        Oracle ZFS Storage Appliance Kit.
         Affects:
         o Oracle ZFS Storage Appliance Kit 8.8
        
        CVE-2022-21524
          7.6 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
        The supported version that is affected is 11. Easily exploitable
        vulnerability allows low privileged attacker with network access via
        SMB to compromise Oracle Solaris. Successful attacks of this
        vulnerability can result in unauthorized ability to cause a hang or
        frequently repeatable crash (complete DOS) of Oracle Solaris as well
        as unauthorized update, insert or delete access to some of Oracle
        Solaris accessible data and unauthorized read access to a subset of
        Oracle Solaris accessible data.
         Affects:
         o Oracle Solaris 11
        
        CVE-2022-21514
          7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
        The supported version that is affected is 11. Easily exploitable
        vulnerability allows unauthenticated attacker with network access via
        multiple protocols to compromise Oracle Solaris. Successful attacks
        of this vulnerability can result in unauthorized ability to cause a
        hang or frequently repeatable crash (complete DOS) of Oracle Solaris.
         Affects:
         o Oracle Solaris 11
        
        CVE-2022-21533
          5.5 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
        The supported version that is affected is 11. Easily exploitable
        vulnerability allows low privileged attacker with logon to the
        infrastructure where Oracle Solaris executes to compromise Oracle
        Solaris. Successful attacks of this vulnerability can result in
        unauthorized ability to cause a hang or frequently repeatable crash
        (complete DOS) of Oracle Solaris.
         Affects:
         o Oracle Solaris 11
        
        CVE-2022-21439
          4.2 AV:L/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:H
        Supported versions that are affected are 10 and 11. Easily
        exploitable vulnerability allows high privileged attacker with logon
        to the infrastructure where Oracle Solaris executes to compromise
        Oracle Solaris. 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 Oracle Solaris.
         Affects:
         o Oracle Solaris 10, 11
        
        CVE-2022-21563
          3.4 AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L
        The supported version that is affected is 8.8. Easily exploitable
        vulnerability allows high privileged attacker with logon to the
        infrastructure where Oracle ZFS Storage Appliance Kit executes to
        compromise Oracle ZFS Storage Appliance Kit. Successful attacks of
        this vulnerability can result in unauthorized update, insert or
        delete access to some of Oracle ZFS Storage Appliance Kit accessible
        data and unauthorized ability to cause a partial denial of service
        (partial DOS) of Oracle ZFS Storage Appliance Kit.
         Affects:
         o Oracle ZFS Storage Appliance Kit 8.8" [2]


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 2022
            https://www.oracle.com/security-alerts/cpujul2022.html

        [2] Text Form of Oracle Critical Patch Update - July 2022 Risk Matrices
            https://www.oracle.com/security-alerts/cpujul2022verbose.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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