ESB-2017.2268 - [Win] i-SENS Inc. SmartLog Diabetes Management Software: Execute arbitrary code/commands - Remote with user interaction 2017-09-08

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.2268
        A vulnerability has been identified in i-SENS Inc. SmartLog
                       Diabetes Management Software
                             8 September 2017

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

Product:           i-SENS Inc. SmartLog Diabetes Management Software
Publisher:         ICS-CERT
Operating System:  Windows
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-13993  

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSMA-17-250-01

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Advisory (ICSMA-17-250-01)

i-SENS Inc. SmartLog Diabetes Management Software

Original release date: September 07, 2017

Legal Notice

All information products included in http://ics-cert.us-cert.gov are provided
"as is" for informational purposes only. The Department of Homeland Security 
(DHS) does not provide any warranties of any kind regarding any information 
contained within. DHS does not endorse any commercial product or service, 
referenced in this product or otherwise. Further dissemination of this product
is governed by the Traffic Light Protocol (TLP) marking in the header. For 
more information about TLP, see http://www.us-cert.gov/tlp/.

OVERVIEW

Independent researcher Mark Cross has identified an uncontrolled search path 
element vulnerability in i-SENS Inc. SmartLog Diabetes Management Software. 
i-SENS has produced an update that mitigates this vulnerability. Mark Cross 
has tested the update to validate that it resolves the vulnerability.

AFFECTED PRODUCTS

The following SmartLog Diabetes Management Software versions are affected:

SmartLog Diabetes Management Software, Version 2.4.0 and prior versions.

IMPACT

Exploitation of this vulnerability could allow an authorized local attacker to
execute arbitrary code on the target system.

BACKGROUND

i-SENS Inc. is a South Korea-based company that maintains offices in several 
countries around the world, including the United States, China, Germany, Peru,
India, and Chile.

The affected product, SmartLog Diabetes Management Software, is software for 
patients to track and monitor personal blood glucose levels by connecting 
their blood glucose meters via USB to a computer. According to i-SENS Inc., 
SmartLog Diabetes Management Software is deployed across the Healthcare and 
Public Health sector. i-SENS estimates that these products are distributed and
used worldwide.

VULNERABILITY CHARACTERIZATION

VULNERABILITY OVERVIEW

UNCONTROLLED SEARCH PATH OR ELEMENTa

An uncontrolled search path element vulnerability has been identified which 
could be exploited by placing a specially crafted DLL file in the search path.
If the malicious DLL is loaded prior to the valid DLL, an attacker could 
execute arbitrary code on the system. This vulnerability does not affect the 
connected blood glucose monitor and would not impact delivery of therapy to 
the patient.

CVE-2017-13993b has been assigned to this vulnerability. A CVSS v3 base score
of 7.3 has been assigned; the CVSS vector string is 
(AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H).c

VULNERABILITY DETAILS

EXPLOITABILITY

This vulnerability is not exploitable remotely and cannot be exploited without
user interaction. The exploit is only triggered when a local user runs the 
vulnerable application and loads the specially crafted, malicious DLL file.

EXISTENCE OF EXPLOIT

No known public exploits specifically target this vulnerability.

DIFFICULTY

An attacker with a low skill level could exploit this vulnerability.

MITIGATION

i-SENS produced an update for the SmartLog Diabetes Management Software, 
Version 2.4.1, which was released to the i-SENS website on September 1, 2017.
It can be found at the following location:

http://push.i-sens.com/smartlog2/2.4.1/Install_SmartLog_2.4.1.exe

NCCIC/ICS-CERT recommends that users take the following measures to protect 
themselves from social engineering attacks:

1.Do not click web links or open unsolicited attachments in email messages.

2.Refer to Recognizing and Avoiding Email Scamsd for more information on 
avoiding email scams.

3.Refer to Avoiding Social Engineering and Phishing Attackse for more 
information on social engineering attacks

ICS-CERT also provides a section for security recommended practices on the 
ICS-CERT web page at 
http://ics-cert.us-cert.gov/content/recommended-practices. ICS-CERT reminds 
organizations to perform proper impact analysis and risk assessment prior to 
deploying defensive measures.

Additional mitigation guidance and recommended practices are publicly 
available in the ICS-CERT Technical Information Paper, 
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation 
Strategies, that is available for download from the ICS-CERT web site 
(http://ics-cert.us-cert.gov/).

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

a. CWE-428: Uncontrolled Search Path or Element, 
http://cwe.mitre.org/data/definitions/428.html, web site last accessed 
September 7, 2017.

b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-13993, NIST 
uses this advisory to create the CVE web site report. This web site will be 
active sometime after publication of this advisory.

c. CVSS Calculator, 
https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S..., 
web site last accessed September 7, 2017.

d. Recognizing and Avoiding Email Scams, 
http://www.us-cert.gov/reading_room/emailscams_0905.pdf, web site last 
accessed September 7, 2017.

e. National Cyber Alert System Cyber Security Tip ST04-014, 
http://www.us-cert.gov/cas/tips/ST04-014.html, web site last accessed 
September 7, 2017.

Contact Information

For any questions related to this report, please contact ICS-CERT at:

Email: ics-cert@hq.dhs.gov

Toll Free: 1-877-776-7585

International Callers: (208) 526-0900

For industrial control systems security information and incident reporting: 
http://ics-cert.us-cert.gov

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

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