Operating System:

[Win]

Published:

08 November 2019

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.4211
        Advisory (icsma-19-311-02) Medtronic Valleylab FT10 and FX8
                              8 November 2019

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

Product:           Medtronic Valleylab FT10 and FX8
Publisher:         ICS-CERT
Operating System:  Windows
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account      
                   Access Confidential Data        -- Remote/Unauthenticated
                   Reduced Security                -- Existing Account      
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-13543 CVE-2019-13539 CVE-2019-3464
                   CVE-2019-3463  

Reference:         ESB-2019.1253
                   ESB-2019.0306

Original Bulletin: 
   https://www.us-cert.gov/ics/advisories/icsma-19-311-02

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ICS Medical Advisory (ICSMA-19-311-02)

Medtronic Valleylab FT10 and FX8

Original release date: November 07, 2019

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1. EXECUTIVE SUMMARY

  o CVSS v3 9.8
  o ATTENTION: Exploitable remotely/low skill level to exploit
  o Vendor: Medtronic
  o Equipment: Valleylab FT10, Valleylab FX8
  o Vulnerabilities: Use of Hard-coded Credentials, Reversible One-way Hash,
    Improper Input Validation

2. RISK EVALUATION

Successful exploitation of these vulnerabilities may allow an attacker to
overwrite files or remotely execute code, resulting in a remote, non-root shell
on the affected products. By default, the network connections on these devices
are disabled. Additionally, the Ethernet port is disabled upon reboot. However,
it is known that network connectivity is often enabled.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following Medtronic Valleylab products, are affected:

  o Valleylab Exchange Client, Version 3.4 and below
  o Valleylab FT10 Energy Platform (VLFT10GEN) software Version 4.0.0 and below
  o Valleylab FX8 Energy Platform (VLFX8GEN) software Version 1.1.0 and below

3.2 VULNERABILITY OVERVIEW

3.2.1 USE OF HARD-CODED CREDENTIALS CWE-798

The affected products use multiple sets of hard-coded credentials. If
discovered, they can be used to read files on the device.

CVE-2019-13543 has been assigned to this vulnerability. A CVSS v3 base score of
5.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:C/
C:L/I:N/A:N ).

3.2.2 REVERSIBLE ONE-WAY HASH CWE-328

The affected products use the descrypt algorithm for OS password hashing. While
interactive, network-based logons are disabled, and attackers can use the other
vulnerabilities within this report to obtain local shell access and access
these hashes.

CVE-2019-13539 has been assigned to this vulnerability. A CVSS v3 base score of
7.0 has been calculated; the CVSS vector string is ( AV:L/AC:H/PR:L/UI:N/S:U/
C:H/I:H/A:H ).

3.2.3 IMPROPER INPUT VALIDATION CWE-20

The affected products use a vulnerable version of the rssh utility in order to
facilitate file uploads. This could provide an attacker with administrative
access to files or the ability to execute arbitrary code.

CVE-2019-3464 , and CVE-2019-3463 have been assigned to this vulnerability. A
CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is ( AV:N
/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H ).

3.3 BACKGROUND

  o CRITICAL INFRASTRUCTURE SECTORS: Healthcare and Public Health
  o COUNTRIES/AREAS DEPLOYED: Worldwide
  o COMPANY HEADQUARTERS LOCATION: Ireland

3.4 RESEARCHER

Medtronic reported these vulnerabilities to CISA.

4. MITIGATIONS

Software patches are currently available for the FT10 platform and will be
available in early 2020 for the FX8 platform. Until these updates can be
applied, Medtronic recommends to either disconnect affected products from IP
networks or to segregate those networks, such that the devices are not
accessible from an untrusted network (e.g., Internet). Patches can be
downloaded at the following location:

https://www.medtronic.com/covidien/en-us/support/software.html

Medtronic has released additional patient focused information, at the following
location:

https://www.medtronic.com/security

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

  o Minimize network exposure for all medical devices and/or systems.
  o Locate medical devices behind firewalls and isolate them where possible.
  o Restrict system access to authorized personnel only and follow a least
    privilege approach.
  o Apply defense-in-depth strategies.
  o Disable any unnecessary accounts, protocols and services.
  o Where additional information is needed, refer to existing cybersecurity in
    medical device guidance issued by the FDA at the following location: https:
    //www.fda.gov/medical-devices/digital-health/cybersecurity

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.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.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 these vulnerabilities.

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