CVE-2023-35863 in HTTP Debugger
Summary
by MITRE • 07/05/2023
In MADEFORNET HTTP Debugger through 9.12, the Windows service does not set the seclevel registry key before launching the driver. Thus, it is possible for an unprivileged application to obtain a handle to the NetFilterSDK wrapper before the service obtains exclusive access.
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Analysis
by VulDB Data Team • 01/11/2026
The vulnerability identified as CVE-2023-35863 affects MADEFORNET HTTP Debugger version 9.12 and earlier, presenting a critical privilege escalation risk within the Windows service architecture. This flaw resides in the service initialization process where the security level registry key is not properly configured before the driver is launched, creating a temporal window where unprivileged applications can seize control of the NetFilterSDK wrapper component. The issue stems from inadequate service initialization sequencing and missing security configuration steps that should occur during the service startup routine.
The technical implementation of this vulnerability involves a race condition scenario where the Windows service fails to establish proper security context before exposing the NetFilterSDK wrapper to the system. The NetFilterSDK wrapper acts as a critical interface point for network filtering operations, and when the seclevel registry key is not set, the system defaults to less restrictive access controls. This creates an opportunity for local unprivileged users to exploit the timing gap between service initialization and security context establishment, allowing them to obtain handles to the wrapper component before the service can secure exclusive access.
From an operational impact perspective, this vulnerability enables local privilege escalation attacks where malicious applications can manipulate network filtering operations through the compromised NetFilterSDK wrapper. The attacker gains the ability to intercept, modify, or redirect network traffic that would normally be controlled by the legitimate HTTP debugger service. This represents a significant security compromise as it allows unauthorized modification of network traffic flows and potentially exposes sensitive data to interception or manipulation. The vulnerability affects systems where the MADEFORNET HTTP Debugger service is running with elevated privileges, making it particularly dangerous in enterprise environments where network monitoring and filtering are critical security functions.
The root cause of this vulnerability aligns with CWE-362, which describes a race condition flaw where two or more threads or processes access shared resources concurrently, leading to unpredictable behavior or security issues. This particular implementation also maps to ATT&CK technique T1068, which covers the exploitation of local privilege escalation vulnerabilities. The lack of proper service initialization and security context establishment creates a window of opportunity that attackers can leverage to gain elevated privileges and access to network filtering capabilities that should remain restricted to authorized service processes.
Mitigation strategies should focus on implementing proper service initialization sequences that ensure all security registry keys are set before any driver components are launched. System administrators should immediately update to the latest version of MADEFORNET HTTP Debugger where this race condition has been addressed through proper service initialization routines. Additionally, monitoring for unauthorized access attempts to the NetFilterSDK wrapper component should be implemented, along with regular security audits to verify that service initialization processes are completing successfully without leaving security gaps. The recommended approach includes configuring appropriate access control lists on registry keys and ensuring that service startup routines enforce proper security context establishment before any network filtering components are exposed to the system.