Arbitrary File Overwrite in UXGROUP Voice Recorder Enables Code Execution

Executive Summary

The vulnerability in UXGROUP LLC Voice Recorder v10.0 is an arbitrary file overwrite issue occurring during the file import process. Attackers exploit insufficient security validation to perform path traversal attacks, allowing them to overwrite critical internal files within the app.

This flaw exists in the component com.kyungeun.timer.activities.overloads.PlayRecordingActivity and can lead to severe consequences such as arbitrary code execution, denial of service, and exposure of sensitive information.

Additionally, there is an arbitrary file read vulnerability that allows attackers, after user login, to access sensitive internal files including authentication and session data. Together, these vulnerabilities can cause account hijacking, configuration tampering, persistent compromise, and app malfunction.

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Compliance Impact

The vulnerability in UXGROUP LLC Voice Recorder v10.0 allows attackers to overwrite critical internal files and read sensitive internal files, including authentication state and session-related data. This can lead to information exposure, account hijacking, and data leakage.

Such unauthorized access and exposure of sensitive user data can negatively impact compliance with common standards and regulations like GDPR and HIPAA, which require protection of personal and sensitive information against unauthorized access and breaches.

Specifically, the exposure of user login information and potential persistent compromise of the application could result in violations of data protection requirements, increasing the risk of regulatory penalties.

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Impact Analysis

This vulnerability can have multiple serious impacts on users and systems running the affected Voice Recorder app.

• Arbitrary code execution, allowing attackers to run malicious code within the app context.
• Denial of service or app malfunction, potentially causing the app to fail to launch or operate correctly.
• Exposure of sensitive information, including authentication states and session-related data.
• Account hijacking due to leaked user login information.
• Configuration tampering and persistent application compromise.
• Data leakage through manipulation of the app to write sensitive files to shared storage.

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Detection Guidance

Detection of this vulnerability involves monitoring the file import process in the UXGROUP LLC Voice Recorder app version 10.0 for suspicious activity, especially attempts to perform path traversal attacks that overwrite critical internal files.

Since the vulnerability exploits improper validation during file import, you can look for unusual file operations or unexpected modifications to internal app files.

Specific commands are not provided in the available resources, but general approaches include:

• Monitoring file system changes in the app's internal storage directories.
• Using Android debugging tools (e.g., adb) to check for unexpected files or modifications.
• Reviewing app logs for errors or unusual file import activity.

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Mitigation Strategies

Immediate mitigation steps include restricting or disabling the file import functionality in the UXGROUP LLC Voice Recorder app version 10.0 until a patch is available.

Additionally, avoid opening or importing files from untrusted sources to prevent exploitation via path traversal attacks.

Monitoring and restricting app permissions related to file system access can also reduce risk.

Ultimately, applying an official security update or patch from the vendor once available is critical to fully resolve the vulnerability.

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