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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.2172
  ICS Advisory (ICSA-21-168-01) - Schneider Electric Enerlin'X Com X 510
                               18 June 2021

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

Product:           Schneider Electric Enerlin'X Com X 510
Publisher:         ICS-CERT
Operating System:  Network Appliance
Impact/Access:     Increased Privileges     -- Existing Account
                   Access Confidential Data -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-22769  

Original Bulletin: 
   https://us-cert.cisa.gov/ics/advisories/icsa-21-168-01

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ICS Advisory (ICSA-21-168-01)

Schneider Electric Enerlin'X Com X 510

Original release date: June 17, 2021

1. EXECUTIVE SUMMARY

  * CVSS v3 8.5
  * ATTENTION: Exploitable remotely/low attack complexity
  * Vendor: Schneider Electric
  * Equipment: Enerlin'X Com X 510
  * Vulnerability: Improper Privilege Management

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow elevation of
privileges, which could result in unintended disclosure of device configuration
information to any authenticated user.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of Enerlin'X Com X 510 energy servers are affected:

  * Enerlin'X Com X 510: All versions prior to v6.8.4

3.2 VULNERABILITY OVERVIEW

3.2.1    IMPROPER PRIVILEGE MANAGEMENT CWE-269

This vulnerability may allow disclosure of device configuration information to
any authenticated user when a specially crafted request is sent to the device.

CVE-2021-22769 has been assigned to this vulnerability. A CVSS v3 base score of
8.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:C/C:H
/I:L/A:N).

3.3 BACKGROUND

  * CRITICAL INFRASTRUCTURE SECTORS: Energy
  * COUNTRIES/AREAS DEPLOYED: Worldwide
  * COMPANY HEADQUARTERS LOCATION: France

3.4 RESEARCHER

Maxim Rupp reported this vulnerability to CISA.

4. MITIGATIONS

Schneider Electric recommends the following:

 1. If the Guest account password on the device remains set to the default
    value, users should immediately change the account password to one that is
    unique and has a strong value.
 2. Users who have configured their Com X 510 device to access remote SMTP,
    FTP, or HTTPS services should immediately change access passwords on the
    affected services and update the Com X configuration.

To further reduce the risk, apply v6.8.4 or later of the Enerlin'X Com X 510
firmware.

For additional information on this vulnerability, see Schneider Electrics
security notification SEVD-2021-159-06

CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:

  * Minimize network exposure for all control system devices and/or systems,
    and ensure that they are not accessible from the Internet.
  * Locate control system networks and remote devices behind firewalls, and
    isolate them from the business network.
  * When remote access is required, use secure methods, such as Virtual Private
    Networks (VPNs), recognizing VPNs may have vulnerabilities and should be
    updated to the most current version available. Also recognize VPN is only
    as secure as its connected devices.

CISA reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.

CISA also provides a section for control systems security recommended practices
on the ICS webpage on us-cert.cisa.gov. Several recommended practices are
available for reading and download, including Improving Industrial Control
Systems Cybersecurity with Defense-in-Depth Strategies.

Additional mitigation guidance and recommended practices are publicly available
on the ICS webpage on us-cert.cisa.gov in the Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies.

Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to CISA for tracking
and correlation against other incidents.

No known public exploits specifically target this vulnerability.


Contact Information

For any questions related to this report, please contact the CISA at:

Email: CISAservicedesk@cisa.dhs.gov
Toll Free: 1-888-282-0870

For industrial control systems cybersecurity information:  https://
us-cert.cisa.gov/ics 
or incident reporting:  https://us-cert.cisa.gov/report

CISA continuously strives to improve its products and services. You can help by
choosing one of the links below to provide feedback about this product.

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

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