CVE-2020-37195: BlueAuditor DoS Vulnerability

CVE-2020-37195 Overview

CVE-2020-37195 is a buffer overflow vulnerability affecting BlueAuditor version 1.7.2.0, a Bluetooth device auditing tool. The vulnerability exists in the registration name input field and allows attackers to crash the application by supplying an oversized input buffer. Specifically, attackers can generate a 1000-character payload and paste it into the 'Name' field during registration to trigger a denial of service condition.

Critical Impact

Local attackers can crash the BlueAuditor application through a buffer overflow in the registration name field, causing denial of service and potential loss of audit data.

Affected Products

• BlueAuditor 1.7.2.0

Discovery Timeline

• 2026-02-11 - CVE CVE-2020-37195 published to NVD
• 2026-02-12 - Last updated in NVD database

Technical Details for CVE-2020-37195

Vulnerability Analysis

This vulnerability is classified as CWE-120 (Buffer Copy without Checking Size of Input), commonly known as a classic buffer overflow. The flaw occurs when the BlueAuditor application fails to properly validate the length of user-supplied input in the registration name field before copying it to a fixed-size buffer.

The attack requires local access to the system where BlueAuditor is installed. User interaction is necessary as the victim must process the malicious input, either by entering it themselves or through a pre-configured payload. While the vulnerability does not impact confidentiality or integrity, it directly affects the availability of the application.

Root Cause

The root cause of CVE-2020-37195 is improper input validation in the registration name handling routine. The application allocates a fixed-size buffer for the registration name but does not implement boundary checking when copying user-supplied data into this buffer. When a 1000-character string is provided, it exceeds the allocated buffer space, causing memory corruption and resulting in an application crash.

Attack Vector

The attack is performed locally on a system running the vulnerable BlueAuditor software. An attacker must have access to the application's registration interface, either through direct interaction or by crafting a malicious configuration that the user imports.

The exploitation process involves:

1. Launching the BlueAuditor application on the target system
2. Navigating to the registration dialog
3. Pasting a crafted 1000-character buffer payload into the 'Name' input field
4. Submitting the registration form, which triggers the buffer overflow and crashes the application

Technical details and proof-of-concept information can be found in the Exploit-DB #47857 entry and the VulnCheck Advisory.

Detection Methods for CVE-2020-37195

Indicators of Compromise

• Unexpected crashes of the BlueAuditor application, particularly during registration or configuration
• Windows Error Reporting (WER) logs showing BlueAuditor.exe crash events with access violation exceptions
• Presence of unusually long strings (>500 characters) in BlueAuditor configuration or log files
• Application crash dumps indicating buffer overflow in registration-related functions

Detection Strategies

• Monitor for repeated application crashes of BlueAuditor through Windows Event Log monitoring
• Implement application whitelisting and version control to detect unauthorized BlueAuditor installations running vulnerable version 1.7.2.0
• Use endpoint detection and response (EDR) solutions to identify buffer overflow exploit patterns targeting the application
• Configure crash dump analysis tools to alert on BlueAuditor-related memory access violations

Monitoring Recommendations

• Enable Windows Error Reporting logging and monitor for BlueAuditor crash events
• Configure SIEM rules to alert on multiple application termination events from BlueAuditor within a short timeframe
• Monitor file system access patterns for suspicious BlueAuditor configuration modifications

How to Mitigate CVE-2020-37195

Immediate Actions Required

• Upgrade BlueAuditor to a patched version if one is available from NSAuditor
• Restrict local access to systems running BlueAuditor to authorized personnel only
• Implement application-level monitoring to detect and respond to crash events
• Consider using alternative Bluetooth auditing tools if a patched version is not available

Patch Information

Review the NSAuditor website for the latest version of BlueAuditor that addresses this vulnerability. Users should upgrade to the newest available version that includes proper input validation for the registration name field.

Workarounds

• Limit physical and remote access to systems running BlueAuditor to trusted users only
• Avoid entering or importing untrusted registration data into the application
• Run BlueAuditor in a sandboxed or virtualized environment to contain potential crashes
• Implement regular backups of audit data to mitigate data loss from unexpected application crashes

# Configuration example - Restrict BlueAuditor execution to authorized users
# Windows: Set file permissions on BlueAuditor executable
icacls "C:\Program Files\NSAuditor\BlueAuditor.exe" /inheritance:r
icacls "C:\Program Files\NSAuditor\BlueAuditor.exe" /grant:r Administrators:(RX)
icacls "C:\Program Files\NSAuditor\BlueAuditor.exe" /grant:r "Security Team":(RX)