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                         AUSCERT Security Bulletin

                               ASB-2021.0139
                  Oracle PeopleSoft Critical Patch Update
                               21 July 2021

===========================================================================

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

Product:          PeopleSoft Enterprise CS Campus Community
                  PeopleSoft Enterprise HCM Candidate Gateway
                  PeopleSoft Enterprise HCM Shared Components
                  PeopleSoft Enterprise PeopleTools
                  PeopleSoft Enterprise PT PeopleTools
Operating System: Windows
                  UNIX variants (UNIX, Linux, OSX)
Impact/Access:    Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                  Modify Arbitrary Files          -- Remote/Unauthenticated
                  Denial of Service               -- Remote/Unauthenticated
                  Access Confidential Data        -- Remote/Unauthenticated
Resolution:       Patch/Upgrade
CVE Names:        CVE-2021-27568 CVE-2021-22884 CVE-2021-21290
                  CVE-2021-3450 CVE-2021-2455 CVE-2021-2421
                  CVE-2021-2408 CVE-2021-2407 CVE-2021-2404
                  CVE-2021-2377 CVE-2020-13956 CVE-2020-8908
                  CVE-2020-7017 CVE-2019-17195 
Reference:        ASB-2021.0135
                  ASB-2021.0134
                  ASB-2021.0133
                  ESB-2021.2416
                  ESB-2021.2408
                  ESB-2021.2357

OVERVIEW

        Multiple vulnerabilities have been identified in :
         o PeopleSoft Enterprise CS Campus Community, versions 9.0, 9.2
         o PeopleSoft Enterprise HCM Candidate Gateway, version 9.2
         o PeopleSoft Enterprise HCM Shared Components, version 9.2
         o PeopleSoft Enterprise PeopleTools, versions 8.57, 8.58,
           8.58.8.59, 8.59
         o PeopleSoft Enterprise PT PeopleTools, versions 8.57, 8.58, 8.59
        [1]


IMPACT

        The vendor has provided the following information regarding the
        vulnerabilities:
        
        "This Critical Patch Update contains 14 new security patches for
        Oracle PeopleSoft. 8 of these vulnerabilities may be remotely
        exploitable without authentication, i.e., may be exploited over a
        network without requiring user credentials." [1]
        
        CVE-2019-17195
          9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
        Supported versions that are affected are 8.58 and 8.59. Easily
        exploitable vulnerability allows unauthenticated attacker with
        network access via HTTP to compromise PeopleSoft Enterprise
        PeopleTools. Successful attacks of this vulnerability can result in
        takeover of PeopleSoft Enterprise PeopleTools.
         Affects:
         o PeopleSoft Enterprise PeopleTools 8.58, 8.59
        
        CVE-2021-27568
          9.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
        Supported versions that are affected are 8.58 and 8.59. Easily
        exploitable vulnerability allows unauthenticated attacker with
        network access via HTTP to compromise PeopleSoft Enterprise
        PeopleTools. Successful attacks of this vulnerability can result in
        unauthorized access to critical data or complete access to all
        PeopleSoft Enterprise PeopleTools accessible data and unauthorized
        ability to cause a hang or frequently repeatable crash (complete DOS)
        of PeopleSoft Enterprise PeopleTools.
         Affects:
         o PeopleSoft Enterprise PeopleTools 8.58, 8.59
        
        CVE-2021-22884
          7.5 AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
        Supported versions that are affected are 8.58 and 8.59. Difficult to
        exploit vulnerability allows unauthenticated attacker with network
        access via HTTP to compromise PeopleSoft Enterprise PeopleTools.
        Successful attacks require human interaction from a person other than
        the attacker. Successful attacks of this vulnerability can result in
        takeover of PeopleSoft Enterprise PeopleTools.
         Affects:
         o PeopleSoft Enterprise PeopleTools 8.58, 8.59
        
        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 8.57 and 8.58. 8.59.
        Difficult to exploit vulnerability allows unauthenticated attacker
        with network access via TLS to compromise PeopleSoft Enterprise
        PeopleTools. Successful attacks of this vulnerability can result in
        unauthorized creation, deletion or modification access to critical
        data or all PeopleSoft Enterprise PeopleTools accessible data as well
        as unauthorized access to critical data or complete access to all
        PeopleSoft Enterprise PeopleTools accessible data.
         Affects:
         o PeopleSoft Enterprise PeopleTools 8.57, 8.58. 8.59
        
        CVE-2020-7017
          6.7 AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:L
        The supported version that is affected is 8.58. Difficult to exploit
        vulnerability allows low privileged attacker with network access via
        HTTP to compromise PeopleSoft Enterprise PeopleTools. 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 PeopleSoft Enterprise PeopleTools accessible data as well
        as unauthorized access to critical data or complete access to all
        PeopleSoft Enterprise PeopleTools accessible data and unauthorized
        ability to cause a partial denial of service (partial DOS) of
        PeopleSoft Enterprise PeopleTools.
         Affects:
         o PeopleSoft Enterprise PeopleTools 8.58
        
        CVE-2021-2421
          6.5 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
        Supported versions that are affected are 9.0 and 9.2. Easily
        exploitable vulnerability allows low privileged attacker with network
        access via HTTP to compromise PeopleSoft Enterprise CS Campus
        Community. Successful attacks of this vulnerability can result in
        unauthorized access to critical data or complete access to all
        PeopleSoft Enterprise CS Campus Community accessible data.
         Affects:
         o PeopleSoft Enterprise CS Campus Community 9.0, 9.2
        
        CVE-2021-2404
          6.5 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
        The supported version that is affected is 9.2. Easily exploitable
        vulnerability allows unauthenticated attacker with network access via
        HTTP to compromise PeopleSoft Enterprise HCM Candidate Gateway.
        Successful attacks of this vulnerability can result in unauthorized
        update, insert or delete access to some of PeopleSoft Enterprise HCM
        Candidate Gateway accessible data as well as unauthorized read access
        to a subset of PeopleSoft Enterprise HCM Candidate Gateway accessible
        data.
         Affects:
         o PeopleSoft Enterprise HCM Candidate Gateway 9.2
        
        CVE-2021-2455
          6.5 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
        The supported version that is affected is 9.2. Easily exploitable
        vulnerability allows high privileged attacker with network access via
        HTTP to compromise PeopleSoft Enterprise HCM Shared Components.
        Successful attacks of this vulnerability can result in unauthorized
        creation, deletion or modification access to critical data or all
        PeopleSoft Enterprise HCM Shared Components accessible data as well
        as unauthorized access to critical data or complete access to all
        PeopleSoft Enterprise HCM Shared Components accessible data.
         Affects:
         o PeopleSoft Enterprise HCM Shared Components 9.2
        
        CVE-2021-2408
          6.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
        The supported version that is affected is 8.59. Easily exploitable
        vulnerability allows unauthenticated attacker with network access via
        HTTP to compromise PeopleSoft Enterprise PT PeopleTools. Successful
        attacks require human interaction from a person other than the
        attacker and while the vulnerability is in PeopleSoft Enterprise PT
        PeopleTools, attacks may significantly impact additional products.
        Successful attacks of this vulnerability can result in unauthorized
        update, insert or delete access to some of PeopleSoft Enterprise PT
        PeopleTools accessible data as well as unauthorized read access to a
        subset of PeopleSoft Enterprise PT PeopleTools accessible data.
         Affects:
         o PeopleSoft Enterprise PT PeopleTools 8.59
        
        CVE-2021-21290
          5.5 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
        Supported versions that are affected are 8.57, 8.58 and 8.59. Easily
        exploitable vulnerability allows low privileged attacker with logon
        to the infrastructure where PeopleSoft Enterprise PeopleTools
        executes to compromise PeopleSoft Enterprise PeopleTools. Successful
        attacks of this vulnerability can result in unauthorized access to
        critical data or complete access to all PeopleSoft Enterprise
        PeopleTools accessible data.
         Affects:
         o PeopleSoft Enterprise PeopleTools 8.57, 8.58, 8.59
        
        CVE-2021-2407
          5.3 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
        Supported versions that are affected are 8.57, 8.58 and 8.59. Easily
        exploitable vulnerability allows unauthenticated attacker with
        network access via HTTP to compromise PeopleSoft Enterprise
        PeopleTools. Successful attacks of this vulnerability can result in
        unauthorized read access to a subset of PeopleSoft Enterprise
        PeopleTools accessible data.
         Affects:
         o PeopleSoft Enterprise PeopleTools 8.57, 8.58, 8.59
        
        CVE-2020-13956
          5.3 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
        Supported versions that are affected are 8.57, 8.58 and 8.59. Easily
        exploitable vulnerability allows unauthenticated attacker with
        network access via HTTP to compromise PeopleSoft Enterprise PT
        PeopleTools. Successful attacks of this vulnerability can result in
        unauthorized update, insert or delete access to some of PeopleSoft
        Enterprise PT PeopleTools accessible data.
         Affects:
         o PeopleSoft Enterprise PT PeopleTools 8.57, 8.58, 8.59
        
        CVE-2021-2377
          4.3 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
        Supported versions that are affected are 8.57, 8.58 and 8.59. Easily
        exploitable vulnerability allows low privileged attacker with network
        access via HTTP to compromise PeopleSoft Enterprise PeopleTools.
        Successful attacks of this vulnerability can result in unauthorized
        read access to a subset of PeopleSoft Enterprise PeopleTools
        accessible data.
         Affects:
         o PeopleSoft Enterprise PeopleTools 8.57, 8.58, 8.59
        
        CVE-2020-8908
          3.3 AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
        Supported versions that are affected are 8.57, 8.58 and 8.59. Easily
        exploitable vulnerability allows low privileged attacker with logon
        to the infrastructure where PeopleSoft Enterprise PeopleTools
        executes to compromise PeopleSoft Enterprise PeopleTools. Successful
        attacks of this vulnerability can result in unauthorized read access
        to a subset of PeopleSoft Enterprise PeopleTools accessible data.
         Affects:
         o PeopleSoft Enterprise PeopleTools 8.57, 8.58, 8.59


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)
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                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
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