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 1. Home
 2. News & Events
 3. Cybersecurity Advisories
 4. ICS Medical Advisory

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ICS Medical Advisory


MICRODICOM DICOM VIEWER

Release Date
June 11, 2024
Alert Code
ICSMA-24-163-01


View CSAF(link is external)


1. EXECUTIVE SUMMARY

 * CVSS v4 8.7
 * ATTENTION: Exploitable remotely/low attack complexity
 * Vendor: MicroDicom
 * Equipment: DICOM Viewer
 * Vulnerabilities: Improper Authorization in Handler for Custom URL Scheme,
   Stack-based Buffer Overflow


2. RISK EVALUATION

Successful exploitation of these vulnerabilities could allow an attacker to both
retrieve and plant medical image files on a victim's system and cause a
stack-based buffer overflow, which could result in sensitive information
disclosure and arbitrary code execution.


3. TECHNICAL DETAILS


3.1 AFFECTED PRODUCTS

The following versions of MicroDicom DICOM Viewer, a medical image viewer, are
affected:

 * DICOM Viewer: Versions prior to 2024.2


3.2 VULNERABILITY OVERVIEW

3.2.1 IMPROPER AUTHORIZATION IN HANDLER FOR CUSTOM URL SCHEME CWE-939(LINK IS
EXTERNAL)

An attacker could retrieve sensitive files (medical images) as well as plant new
medical images or overwrite existing medical images on a victim's system. User
interaction is required to exploit this vulnerability.

CVE-2024-33606 has been assigned to this vulnerability. A CVSS v3.1 base score
of 8.8 has been calculated; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H(link is external)).

A CVSS v4 score has also been calculated for CVE-2024-33606. A base score of 8.6
has been calculated; the CVSS vector string is
(CVSS4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N(link is
external)).

3.2.2 STACK-BASED BUFFER OVERFLOW CWE-121(LINK IS EXTERNAL)

The affected product is vulnerable to a stack-based buffer overflow, which may
allow an attacker to execute arbitrary code on affected installations of DICOM
Viewer. User interaction is required to exploit this vulnerability.

CVE-2024-28877 has been assigned to this vulnerability. A CVSS v3.1 base score
of 8.8 has been calculated; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H(link is external)).

A CVSS v4 score has also been calculated for CVE-2024-28877. A base score of 8.7
has been calculated; the CVSS vector string is
(CVSS4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N(link is
external)).


3.3 BACKGROUND

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


3.4 RESEARCHER

Michael Heinzl reported these vulnerabilities to CISA.


4. MITIGATIONS

MicroDicom recommends users upgrade to DICOM Viewer version 2024.2(link is
external).

CISA recommends users take defensive measures to minimize the risk of
exploitation of this these vulnerabilities, such as:

 * Minimize network exposure for all control system devices and/or systems,
   ensuring they are not accessible from the internet.
 * Locate control system networks and remote devices behind firewalls and
   isolating them from business networks.
 * When remote access is required, use more 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 the 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 cisa.gov/ics. Several CISA products detailing cyber
defense best practices are available for reading and download, including
Improving Industrial Control Systems Cybersecurity with Defense-in-Depth
Strategies.

CISA encourages organizations to implement recommended cybersecurity strategies
for proactive defense of ICS assets.

Additional mitigation guidance and recommended practices are publicly available
on the ICS webpage at cisa.gov/ics in the technical information paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies.

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

CISA also recommends users take the following measures to protect themselves
from social engineering attacks:

 * Do not click web links or open attachments in unsolicited email messages.
 * Refer to Recognizing and Avoiding Email Scams for more information on
   avoiding email scams.
 * Refer to Avoiding Social Engineering and Phishing Attacks for more
   information on social engineering attacks.

No known public exploitation specifically targeting these vulnerabilities has
been reported to CISA at this time.


5. UPDATE HISTORY

 * June 11, 2024: Initial Publication

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


PLEASE SHARE YOUR THOUGHTS

We recently updated our anonymous product survey; we’d welcome your feedback.


RELATED ADVISORIES

May 30, 2024
ICS Medical Advisory | ICSMA-24-151-01


BAXTER WELCH ALLYN CONFIGURATION TOOL

May 30, 2024
ICS Medical Advisory | ICSMA-24-151-02


BAXTER WELCH ALLYN CONNEX SPOT MONITOR

Mar 05, 2024
ICS Medical Advisory | ICSMA-24-065-01


SANTESOFT SANTE FFT IMAGING

Feb 29, 2024
ICS Medical Advisory | ICSMA-24-060-01


MICRODICOM DICOM VIEWER

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