CISA Advisory: Ossur Mobile Logic Application | CISA

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1. EXECUTIVE SUMMARY

• CVSS v4 5.6
• ATTENTION: Low attack complexity
• Vendor: Ossur
• Equipment: Mobile Logic Application
• Vulnerabilities: Exposure of Sensitive System Information to an Unauthorized Control Sphere, Command Injection, Use of Hard-coded Credentials

2. RISK EVALUATION

Successful exploitation of these vulnerabilities could allow an attacker unauthorized access to sensitive information.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following Ossur products are affected:

• Logic Mobile Application: Versions prior to 1.5.5

3.2 Vulnerability Overview

3.2.1 EXPOSURE OF SENSITIVE SYSTEM INFORMATION TO AN UNAUTHORIZED CONTROL SPHERE CWE-497

A valid set of credentials in a .js file and a static token for communication were obtained from the decompiled IPA. An attacker could use the information to disrupt normal use of the application by changing the translation files and thus weaken the integrity of normal use.

CVE-2024-53683 has been assigned to this vulnerability. A CVSS v3.1 base score of 4.4 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N).

A CVSS v4 score has also been calculated for CVE-2024-53683. A base score of 5.6 has been calculated; the CVSS vector string is (CVSS4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N).

3.2.2 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN A COMMAND (‘COMMAND INJECTION’) CWE-77

Multiple bash files were present in the application’s private directory. Bash files can be used on their own, by an attacker that has already full access to the mobile platform to compromise the translations for the application.

CVE-2024-54681 has been assigned to this vulnerability. A CVSS v3.1 base score of 3.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L).

A CVSS v4 score has also been calculated for CVE-2024-54681. A base score of 2.0 has been calculated; the CVSS vector string is (CVSS4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N).

3.2.3 USE OF HARD-CODED CREDENTIALS CWE-798

Hard-coded credentials were included as part of the application binary. These credentials served as part of the application authentication flow and communication with the mobile application. An attacker could access unauthorized information.

CVE-2024-45832 has been assigned to this vulnerability. A CVSS v3.1 base score of 4.3 has been calculated; the CVSS vector string is (AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).

A CVSS v4 score has also been calculated for CVE-2024-45832. A base score of 2.0 has been calculated; the CVSS vector string is (CVSS4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:H/SA:N).

3.3 BACKGROUND

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

3.4 RESEARCHER

Bryan Riggins reported these vulnerabilities to CISA.

4. MITIGATIONS

Ossur recommends users download Version 1.5.5 or later of the mobile application. The latest version of the application can be obtained through the app store on respective mobile devices. No additional action is required by users.

CISA recommends users take defensive measures to minimize the risk of exploitation of 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:

No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time. These vulnerabilities are not exploitable remotely.

5. UPDATE HISTORY

• December 19, 2024: Initial Publication