Oracle Food and Beverage Applications Products: Multiple vulnerabilities

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                         AUSCERT Security Bulletin

                               ASB-2021.0088
        Oracle Food and Beverage Applications Critical Patch Update
                               21 April 2021

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

Product:          Oracle Hospitality Inventory Management
                  Oracle Hospitality RES 3700
Operating System: Windows
                  UNIX variants (UNIX, Linux, OSX)
Impact/Access:    Root Compromise          -- Remote/Unauthenticated
                  Denial of Service        -- Remote/Unauthenticated
                  Access Confidential Data -- Existing Account      
Resolution:       Patch/Upgrade
CVE Names:        CVE-2021-2311 CVE-2018-20843 
Reference:        ASB-2020.0072
                  ESB-2021.1207
                  ESB-2020.3862
                  ESB-2019.2366

OVERVIEW

        Multiple vulnerabilities have been identified in :
         o Oracle Hospitality Inventory Management, version 9.1.0
         o Oracle Hospitality RES 3700, versions 5.7.0-5.7.6
        [1]


IMPACT

        The vendor has provided the following information regarding the
        vulnerabilities:
        
        "This Critical Patch Update contains 2 new security patches for
        Oracle Food and Beverage Applications. 1 of these vulnerabilities may
        be remotely exploitable without authentication, i.e., may be
        exploited over a network without requiring user credentials." [1]
        
        CVE-2018-20843
          7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
        Supported versions that are affected are 5.7.0-5.7.6. Easily
        exploitable vulnerability allows unauthenticated attacker with
        network access via HTTP to compromise Oracle Hospitality RES 3700.
        Successful attacks of this vulnerability can result in unauthorized
        ability to cause a hang or frequently repeatable crash (complete DOS)
        of Oracle Hospitality RES 3700.
         Affects:
         o Oracle Hospitality RES 3700 5.7.0-5.7.6
        
        CVE-2021-2311
          6.5 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
        The supported version that is affected is 9.1.0. Easily exploitable
        vulnerability allows low privileged attacker with network access via
        HTTP to compromise Oracle Hospitality Inventory Management.
        Successful attacks of this vulnerability can result in unauthorized
        access to critical data or complete access to all Oracle Hospitality
        Inventory Management accessible data.
         Affects:
         o Oracle Hospitality Inventory Management 9.1.0


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 - 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

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)
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                On call after hours for member emergencies only.
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