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                         AUSCERT Security Bulletin

                               ASB-2019.0216
                             Oracle Siebel CRM
                               17 July 2019

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

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

Product:              Siebel Applications
Operating System:     Windows
                      UNIX variants (UNIX, Linux, OSX)
Impact/Access:        Modify Arbitrary Files   -- Remote with User Interaction
                      Access Confidential Data -- Remote with User Interaction
Resolution:           Patch/Upgrade
CVE Names:            CVE-2019-2857 CVE-2019-2779 CVE-2019-2777
Member content until: Friday, August 16 2019

OVERVIEW

        Multiple vulnerabilities have been identified in :
         o Siebel Applications, versions 19.0 and prior
        [1]


IMPACT

        The vendor has provided the following information regarding the
        vulnerabilities:
        
        "This Critical Patch Update contains 3 new security fixes for Oracle
        Siebel CRM. 1 of these vulnerabilities may be remotely exploitable
        without authentication, i.e., may be exploited over a network without
        requiring user credentials." [1]
        
        CVE-2019-2777
          6.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
        Easily exploitable vulnerability allows unauthenticated attacker with
        network access via HTTP to compromise the affected system. Successful
        attacks require human interaction from a person other than the
        attacker and while the vulnerability is in the affected system,
        attacks may significantly impact additional products. Successful
        attacks of this vulnerability can result in unauthorized update,
        insert or delete access to some of the affected system's accessible
        data as well as unauthorized read access to a subset of the affected
        system's accessible data.
         Affects:
         o Siebel Core - Server Framework 19.0 and prior
        
        CVE-2019-2857
          5.4 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
        Easily exploitable vulnerability allows low privileged attacker with
        network access via HTTP to compromise the affected system. Successful
        attacks require human interaction from a person other than the
        attacker and while the vulnerability is in the affected system,
        attacks may significantly impact additional products. Successful
        attacks of this vulnerability can result in unauthorized update,
        insert or delete access to some of the affected system's accessible
        data as well as unauthorized read access to a subset of the affected
        system's accessible data.
         Affects:
         o Siebel UI Framework 19.0 and prior
        
        CVE-2019-2779
          4.2 AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N
        Difficult to exploit vulnerability allows high privileged attacker
        with network access via HTTP to compromise the affected system.
        Successful attacks require human interaction from a person other than
        the attacker. Successful attacks of this vulnerability can result in
        unauthorized access to critical data or complete access to all the
        affected system's accessible data.
         Affects:
         o Siebel Core - Common Components 19.0 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 2019
            https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html

        [2] Text Form of Oracle Critical Patch Update - July 2019 Risk Matrices
            https://www.oracle.com/technetwork/security-advisory/cpujul2019verbose-5072838.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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