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1. EXECUTIVE SUMMARY
- CVSS v3 9.8
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Delta Electronics
- Equipment: InfraSuite Device Master
- Vulnerabilities: Deserialization of Untrusted Data, Path Traversal, Missing Authentication for Critical Function
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an unauthenticated attacker to remotely execute code, cause a denial-of-service condition by remotely deleting files or changing group privileges, or remotely read and write files, all with local administrator privileges.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of InfraSuite Device Master, a real-time device monitoring software, are affected:
- Version 00.00.01a and prior
3.2 VULNERABILITY OVERVIEW
Delta Electronics InfraSuite Device Master versions 00.00.01a and prior deserialize user-supplied data provided through the Device-DataCollect service port without proper verification. An attacker could provide malicious serialized objects to execute arbitrary code upon deserialization.
Delta Electronics InfraSuite Device Master versions 00.00.01a and prior deserialize user-supplied data provided through the Device-Gateway service port without proper verification. An attacker could provide malicious serialized objects to execute arbitrary code upon deserialization.
Delta Electronics InfraSuite Device Master versions 00.00.01a and prior deserialize network packets without proper verification. If the device connects to an attacker-controlled server, the attacker could send maliciously crafted packets that would be deserialized and executed, leading to remote code execution.
Delta Electronics InfraSuite Device Master Versions 00.00.01a and prior allow attacker provided data already serialized into memory to be used in file operation application programmable interfaces (APIs). This could create arbitrary files, which could be used in API operations and could ultimately result in remote code execution.
Delta Electronics InfraSuite Device Master Versions 00.00.01a and prior mishandle .ZIP archives containing characters used in path traversal. This path traversal could result in remote code execution.
The database backup function in Delta Electronics InfraSuite Device Master Versions 00.00.01a and prior lacks proper authentication. An attacker could provide malicious serialized objects which, when deserialized, could activate an opcode for a backup scheduling function without authentication. This function allows the user to designate all function arguments and the file to be executed. This could allow the attacker to start any new process and achieve remote code execution.
Delta Electronics InfraSuite Device Master versions 00.00.01a and prior lack proper authentication for functions that create and modify user groups. An attacker could provide malicious serialized objects that could run these functions without authentication to create a new user and add them to the administrator group.
Delta Electronics InfraSuite Device Master versions 00.00.01a and prior lacks authentication for a function that changes group privileges. An attacker could use this to create a denial-of-service state or escalate their own privileges.
Delta Electronics InfraSuite Device Master versions 00.00.01a and prior allow unauthenticated users to trigger the WriteConfiguration method, which could allow an attacker to provide new values for user configuration files such as UserListInfo.xml. This could lead to the changing of administrative passwords.
Delta Electronics InfraSuite Device Master versions 00.00.01a and prior allow unauthenticated users to access the aprunning endpoint, which could allow an attacker to retrieve any file from the “RunningConfigs” directory. The attacker could then view and modify configuration files such as UserListInfo.xml, which would allow them to see existing administrative passwords.
- CRITICAL INFRASTRUCTURE SECTORS: Energy
- COUNTRIES/AREAS DEPLOYED: Worldwide
- COMPANY HEADQUARTERS LOCATION: Taiwan
kimiya, working with Trend Micro Zero Day Initiative, reported these vulnerabilities to CISA.
Delta Electronics recommends users uninstall old versions of InfraSuite Device Master and reinstall the updated version 00.00.02a using the installer.
Delta Electronics also recommends users follow CISA’s security recommendations.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability these vulnerabilities. Specifically, users should:
- Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the Internet.
- Locate control system networks and remote devices behind firewalls and isolate them from business networks.
- When remote access is required, use 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 its 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 at 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.
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.
No known public exploits specifically target these vulnerabilities.
For any questions related to this report, please contact the CISA at:
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