Executive Summary

CVE-2018-25255 is a local buffer overflow vulnerability in 10-Strike LANState version 8.8. It occurs in the structured exception handling (SEH) mechanism when the application processes specially crafted LSM map files.

An attacker can create a malicious LSM file with a payload in the ObjCaption parameter that overflows a buffer, overwrites the SEH chain, and executes arbitrary code (shellcode) when the file is opened in the application.

This vulnerability allows local attackers to run code on the affected system by exploiting the buffer overflow triggered during file processing.

Useful 0 Not Useful 0

Compliance Impact

The vulnerability in 10-Strike LANState 8.8 allows local attackers to execute arbitrary code, which can lead to unauthorized access, modification, or disruption of data handled by the application.

Such unauthorized code execution and potential data compromise could negatively impact compliance with standards and regulations like GDPR and HIPAA, which require protection of confidentiality, integrity, and availability of sensitive data.

However, the provided information does not explicitly describe the direct effects on compliance or specific regulatory impacts.

Useful 0 Not Useful 0

Impact Analysis

This vulnerability can have severe impacts because it allows local attackers to execute arbitrary code on the affected system without requiring privileges or user interaction.

• Attackers can gain control over the system by running malicious shellcode.
• Confidentiality, integrity, and availability of the system can be compromised.
• It can lead to unauthorized access, data theft, or disruption of services.

Useful 0 Not Useful 0

Detection Guidance

This vulnerability is a local buffer overflow in the 10-Strike LANState application triggered by opening a specially crafted .lsm file. Detection involves identifying if the vulnerable version 8.8 or earlier of LANState is installed on the system.

Since the exploit requires opening a malicious .lsm file locally, network detection is limited. However, monitoring for suspicious .lsm file openings or unusual process behavior related to LANState could help.

No specific detection commands are provided in the resources. As a general approach, you can check the installed version of LANState with commands like:

• On Windows, use PowerShell to check installed software: Get-ItemProperty 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*' | Where-Object { $_.DisplayName -like '*LANState*' } | Select-Object DisplayName, DisplayVersion
• Search for .lsm files on the system that might be suspicious: dir C:\ /s /b *.lsm

Additionally, monitoring process creation events for LANState.exe opening files or unusual behavior could indicate exploitation attempts.

Useful 0 Not Useful 0

Mitigation Strategies

Immediate mitigation steps include:

• Avoid opening any untrusted or suspicious .lsm files in the LANState application.
• If possible, upgrade LANState to a version later than 8.8 where this vulnerability is fixed (no fixed version explicitly mentioned, so check vendor updates).
• Restrict local user access to the LANState application to trusted users only.
• Implement application whitelisting or sandboxing to prevent execution of malicious payloads.

Since the vulnerability requires local file opening, controlling file access and user permissions is critical.

Useful 0 Not Useful 0