Executive Summary

This vulnerability is a local privilege escalation issue in ANSSI's DFIR-ORC tool, versions 10.2.7 and earlier. An attacker who already has some access to the system can place a malicious DLL file in the shared temporary directory C:\Windows\Temp. When DFIR-ORC is executed from this location with administrative privileges, it automatically loads the malicious DLL. This allows the attacker to gain administrator-level privileges on the affected machine.

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Impact Analysis

The impact of this vulnerability is that an attacker with prior access to the system can escalate their privileges to administrator level by exploiting the way DFIR-ORC loads DLLs from a shared temporary directory. This means the attacker can gain full control over the affected machine, potentially allowing them to execute arbitrary code, modify system settings, access sensitive data, or disrupt system operations.

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Detection Guidance

This vulnerability can be detected by checking if the DFIR-ORC application is being executed from the C:\Windows\Temp directory, which is a shared temporary directory with potentially insecure permissions.

You can also look for the presence of suspicious or unexpected DLL files in the C:\Windows\Temp directory that could be loaded by DFIR-ORC.

Suggested commands to help detect this vulnerability include:

• On Windows, use PowerShell to list DLL files in the Temp directory: Get-ChildItem -Path C:\Windows\Temp -Filter *.dll
• Check the execution path of DFIR-ORC processes: Get-Process -Name dfir-orc | Select-Object Path
• Use auditing or monitoring tools to detect execution of DFIR-ORC from the Temp directory.

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Mitigation Strategies

Immediate mitigation steps include upgrading DFIR-ORC to version 10.2.8 or later, as these versions have addressed the vulnerability.

If upgrading is not immediately possible, avoid executing DFIR-ORC from the C:\Windows\Temp directory or any other overly permissive shared temporary directories.

Alternatively, configure the temporary directory used by DFIR-ORC to a secure location with restricted permissions to prevent attackers from placing malicious DLLs.

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Compliance Impact

This vulnerability allows an attacker with prior system access to escalate privileges to administrator level by exploiting DLL loading from a shared temporary directory. Such unauthorized privilege escalation can lead to unauthorized access to sensitive data or system controls.

While the provided information does not explicitly mention compliance with standards like GDPR or HIPAA, the ability for an attacker to gain administrative privileges could potentially lead to breaches of confidentiality, integrity, and availability of data, which are core concerns of these regulations.

Therefore, if exploited, this vulnerability could negatively impact an organization's compliance posture by increasing the risk of data breaches or unauthorized data access, which are regulated under standards such as GDPR and HIPAA.

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