Oracle Systems Products: Multiple Vulnerabilities

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                         ZMCIRT Vulnerability Bulletin

                             ZMC-2021.04.21.0400
               Oracle Systems Products: Multiple Vulnerabilities
                               21st April 2021

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Product:          Oracle Solaris
                  Oracle ZFS Storage Appliance Kit
Operating System: Windows
                  UNIX variants (UNIX, Linux, OSX)
Impact/Access:    Root Compromise                 -- Remote/Unauthenticated
                  Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                  Modify Arbitrary Files          -- Existing Account      
                  Denial of Service               -- Existing Account      
                  Access Confidential Data        -- Existing Account      
Resolution:       Patch/Upgrade
CVE Names:        CVE-2021-2192 CVE-2021-2167 CVE-2021-2149
                  CVE-2021-2147 CVE-2020-1472 
Reference:        ASB-2020.0140
                  ESB-2020.3239

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 5 new security patches for
        Oracle Systems. 1 of these vulnerabilities may be remotely
        exploitable without authentication, i.e., may be exploited over a
        network without requiring user credentials." [1]
        
        CVE-2021-2167
          7.8 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
        The supported version that is affected is 10. 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
        takeover of Oracle Solaris.
         Affects:
         o Oracle Solaris 10
        
        CVE-2021-2192
          6.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/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 as well as unauthorized update,
        insert or delete access to some of Oracle Solaris accessible data.
        Note : This vulnerability applies to Oracle Solaris on SPARC systems
        only.
         Affects:
         o Oracle Solaris 11
        
        CVE-2021-2149
          2.5 AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
        The supported version that is affected is 8.8. Difficult to exploit
        vulnerability allows low 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.
         Affects:
         o Oracle ZFS Storage Appliance Kit 8.8
        
        CVE-2020-1472
          10.0 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
        The supported version that is affected is 8.8. Easily exploitable
        vulnerability allows unauthenticated attacker with network access via
        multiple protocols to compromise Oracle ZFS Storage Appliance Kit.
        While the vulnerability is in Oracle ZFS Storage Appliance Kit,
        attacks may significantly impact additional products. 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-2021-2147
          1.8 AV:L/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:N
        The supported version that is affected is 8.8. Difficult to exploit
        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
        require human interaction from a person other than the attacker.
        Successful attacks of this vulnerability can result in unauthorized
        update, insert or delete access to some of Oracle ZFS Storage
        Appliance Kit accessible data.
         Affects:
         o Oracle ZFS Storage Appliance Kit 8.8


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 - April 2021
            https://www.oracle.com/security-alerts/cpuapr2021.html

        [2] Text Form of Oracle Critical Patch Update - April 2021 Risk
            Matrices
            https://www.oracle.com/security-alerts/cpuapr2021verbose.html


 
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