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             AUSCERT External Security Bulletin Redistribution

              Critical Vulnerability in SAP NetWeaver AS Java
                               16 July 2020


        AusCERT Security Bulletin Summary

Product:           SAP NetWeaver AS Java
Publisher:         CISA
Operating System:  Windows
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
                   Access Confidential Data        -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-6287  

Original Bulletin: 

Revision History:  July 16 2020: Proof of Concept Exploit code for CVE-2020-6287, 
                                 CVE-2020-6286 (SAP RECON vulnerability) is 
                                 publicly available. AusCERT suggests to patch 
                                 now if not already done so.
                   July 14 2020: Initial Release

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Alert (AA20-195A)

Critical Vulnerability in SAP NetWeaver AS Java

Original release date: July 13, 2020


On July 13, 2020 EST, SAP released a security update to address a critical
vulnerability, CVE-2020-6287, affecting the SAP NetWeaver Application Server
(AS) Java component LM Configuration Wizard. An unauthenticated attacker can
exploit this vulnerability through the Hypertext Transfer Protocol (HTTP) to
take control of trusted SAP applications.

Due to the criticality of this vulnerability, the attack surface this
vulnerability represents, and the importance of SAP's business applications,
the Cybersecurity and Infrastructure Security Agency (CISA) strongly recommends
organizations immediately apply patches. CISA recommends organizations
prioritize patching internet-facing systems, and then internal systems.

Organizations that are unable to immediately patch should mitigate the
vulnerability by disabling the LM Configuration Wizard service (see SAP
Security Note #2939665). Should these options be unavailable or if the actions
will take more than 24 hours to complete, CISA strongly recommends closely
monitoring your SAP NetWeaver AS for anomalous activity.

CISA is unaware of any active exploitation of these vulnerabilities at the time
of this report. However, because patches have been publicly released, the
underlying vulnerabilities could be reverse-engineered to create exploits that
target unpatched systems.

Technical Details

Affected Systems

This vulnerability is present by default in SAP applications running on top of
SAP NetWeaver AS Java 7.3 and any newer versions (up to SAP NetWeaver 7.5).
Potentially vulnerable SAP business solutions include any SAP Java-based
solutions such as (but not limited to):

  o SAP Enterprise Resource Planning,
  o SAP Product Lifecycle Management,
  o SAP Customer Relationship Management,
  o SAP Supply Chain Management,
  o SAP Supplier Relationship Management,
  o SAP NetWeaver Business Warehouse,
  o SAP Business Intelligence,
  o SAP NetWeaver Mobile Infrastructure,
  o SAP Enterprise Portal,
  o SAP Process Orchestration/Process Integration),
  o SAP Solution Manager,
  o SAP NetWeaver Development Infrastructure,
  o SAP Central Process Scheduling,
  o SAP NetWeaver Composition Environment, and
  o SAP Landscape Manager.

Attack Surface

The vulnerability was identified in a component that is part of the SAP
NetWeaver AS Java. This technology stack is part of the SAP Solution Manager,
which is a support and system management suite.

The SAP NetWeaver AS for Java technology supports the SAP Portal component,
which may therefore be affected by this vulnerability and is typically exposed
to the internet. Passive analysis of internet-facing applications indicates
that a number of such applications are connected to the internet and could be
affected by this vulnerability.


On July 13, 2020 EST, SAP released the patch for a critical vulnerability,
CVE-2020-6287, affecting its NetWeaver AS for Java component. This
vulnerability can lead to compromise of vulnerable SAP installations, including
the modification or extraction of highly sensitive information, as well as the
disruption of critical business processes. A remote, unauthenticated attacker
can exploit this vulnerability through an HTTP interface, which is typically
exposed to end users and, in many cases, exposed to the internet.

The vulnerability is introduced due to the lack of authentication in a web
component of the SAP NetWeaver AS for Java allowing for several high-privileged
activities on the SAP system.


If successfully exploited, a remote, unauthenticated attacker can obtain
unrestricted access to SAP systems through the creation of high-privileged
users and the execution of arbitrary operating system commands with the
privileges of the SAP service user account (<sid>adm), which has unrestricted
access to the SAP database and is able to perform application maintenance
activities, such as shutting down federated SAP applications. The
confidentiality, integrity, and availability of the data and processes hosted
by the SAP application are at risk by this vulnerability.


CISA strongly recommends organizations review SAP Security Note #2934135 for
more information and apply critical patches as soon as possible. CISA
recommends prioritizing patching over application of individual mitigations.
When patching, external facing systems should be urgently addressed, followed
by internal systems.

Patched versions of the affected components are available at the SAP One
Support Launchpad.

Additional Recommendations

CISA encourages users and administrators of SAP products to:

  o Scan SAP systems for all known vulnerabilities, such as missing security
    patches, dangerous system configurations, and vulnerabilities in SAP custom
  o Apply missing security patches immediately and institutionalize security
    patching as part of a periodic process
  o Ensure secure configuration of your SAP landscape
  o Identify and analyze the security settings of SAP interfaces between
    systems and applications to understand risks posed by these trust
  o Analyze systems for malicious or excessive user authorizations.
  o Monitor systems for indicators of compromise resulting from the
    exploitation of vulnerabilities.
  o Monitor systems for suspicious user behavior, including both privileged and
    non-privileged users.
  o Apply threat intelligence on new vulnerabilities to improve the security
    posture against advanced targeted attacks.
  o Define comprehensive security baselines for systems and continuously
    monitor for compliance violations and remediate detected deviations.

These recommendations apply to SAP systems in public, private, and hybrid cloud

See the Onapsis report on the "RECON" SAP Vulnerability for more information.


SAP and Onapsis contributed to this Alert.


[1] Onapsis Threat Report
[2] CVE-2020-6287
[3] SAP Security Note
[4] SAP Trust Center
[5] SAP Monthly Security Patch Day Blog


July, 13 2020: Initial Version

This product is provided subject to this Notification and this Privacy & Use

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