ESB-2018.1590 - [Appliance] BeaconMedaes TotalAlert Scroll Medical Air Systems: Multiple vulnerabilities 2018-05-25

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1590
         Advisory (ICSMA-18-144-01) BeaconMedaes TotalAlert Scroll
                            Medical Air Systems
                                25 May 2018

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

Product:           BeaconMedaes TotalAlert Scroll Medical Air Systems
Publisher:         ICS-CERT
Operating System:  Network Appliance
Impact/Access:     Access Privileged Data -- Remote/Unauthenticated
                   Unauthorised Access    -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-7526 CVE-2018-7518 CVE-2018-7515

Reference:         ESB-2018.0749

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSMA-18-144-01

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Advisory (ICSMA-18-144-01) BeaconMedaes TotalAlert Scroll Medical Air Systems

Original release date: May 24, 2018

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1. EXECUTIVE SUMMARY

    CVSS v3 7.5
    ATTENTION: Exploitable remotely/low skill level to exploit
    Vendor: BeaconMedaes
    Equipment: TotalAlert Scroll Medical Air Systems web application
    Vulnerabilities: Improper Access Control, Insufficiently Protected 
                     Credentials, Unprotected Storage of Credentials

2. RISK EVALUATION

Successful exploitation of these vulnerabilities could allow an attacker to 
view and potentially modify some device information and web application setup
information, which does not include access to patient health information. 
Additionally, BeaconMedaes has stated that a successful attacker would not be
able to affect the ability of the device to operate as designed for the 
purpose of delivering medical air in compliance with the NFPA 99 standard for
healthcare facilities.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following TotalAlert Scroll Medical Air Systems web applications are 
affected:

 o TotalAlert Scroll Medical Air Systems running software Versions 
4107600010.23 and prior.

3.2 VULNERABILITY OVERVIEW

3.2.1 IMPROPER ACCESS CONTROL CWE-284

By accessing a specific uniform resource locator (URL) on the webserver, a 
malicious user may be able to access information in the application without 
authenticating.

CVE-2018-7526 has been assigned to this vulnerability. A CVSS v3 base score of
5.3 has been calculated; the CVSS vector string is 
(AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).

3.2.2 INSUFFICIENTLY PROTECTED CREDENTIALS CWE-522

An attacker with network access to the integrated web server could retrieve 
default or user defined credentials stored and transmitted in an insecure 
manner.

CVE-2018-7518 has been assigned to this vulnerability. A CVSS v3 base score of
7.5 has been calculated; the CVSS vector string is 
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

3.2.3 UNPROTECTED STORAGE OF CREDENTIALS CWE-256

Passwords are presented in plaintext in a file that is accessible without 
authentication.

CVE-2018-7515 has been assigned to this vulnerability. A CVSS v3 base score of
7.5 has been calculated; the CVSS vector string is 
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

3.3 BACKGROUND

 o Critical Infrastructure Sectors: Healthcare and Public Health
 o Countries/Areas Deployed: Worldwide
 o Company Headquarters Location: U.S.

3.4 RESEARCHER

Maxim Rupp reported these vulnerabilities to NCCIC.

4. MITIGATIONS

BeaconMedaes has stated that the vulnerabilities do not compromise either 
patient health information or compliance with the NFPA 99 standard for 
healthcare facilities. To address these vulnerabilities, BeaconMedaes has 
created update 4107600010.24 and recommends that users of the TotalAlert 
Scroll Medical Air Systems update to this version or the latest release. 
BeaconMedaes recommends that affected users reach out to BeaconMedaes directly
at 1-888-4MEDGAS (463-3427) to obtain this update.

NCCIC recommends users take defensive measures to minimize the risk of 
exploitation of these vulnerabilities. Specifically, users should:

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

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

NCCIC also provides a section for control systems security recommended 
practices on the ICS-CERT web page. 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-CERT website 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 NCCIC for 
tracking and correlation against other incidents.

No known public exploits specifically target these vulnerabilities.

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