CVE-2010-5162 in TotalCare
Summary
by MITRE
** DISPUTED ** Race condition in G DATA TotalCare 2010 on Windows XP allows local users to bypass kernel-mode hook handlers, and execute dangerous code that would otherwise be blocked by a handler but not blocked by signature-based malware detection, via certain user-space memory changes during hook-handler execution, aka an argument-switch attack or a KHOBE attack. NOTE: this issue is disputed by some third parties because it is a flaw in a protection mechanism for situations where a crafted program has already begun to execute.
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Analysis
by VulDB Data Team • 08/07/2024
The vulnerability described in CVE-2010-5162 represents a significant race condition within the kernel-mode hook handler mechanism of G DATA TotalCare 2010 antivirus software running on Windows XP systems. This flaw operates at the intersection of kernel security and runtime protection mechanisms, creating a critical pathway for privilege escalation and code execution bypass. The issue stems from improper synchronization during the execution of kernel-mode hook handlers, which are designed to monitor and intercept potentially malicious system calls and memory operations. When the antivirus software's hook handlers execute, they create a temporal window where user-space processes can manipulate memory contents in ways that effectively disrupt the normal operation of these security mechanisms.
The technical exploitation of this vulnerability involves a sophisticated argument-switch attack pattern that leverages the timing window between hook handler execution and memory validation. During the brief period when the kernel-mode hook is active, local users can modify memory structures that control the hook's behavior, effectively switching the arguments or parameters that the handler uses to make security decisions. This type of attack falls under the category of kernel-mode hook bypass techniques and aligns with the ATT&CK framework's T1089 (Disabling Security Tools) and T1055 (Process Injection) tactics. The vulnerability specifically targets the KHOBE (Kernel Hook Override By Environment) attack pattern, where attackers manipulate the execution environment to bypass security controls that would normally prevent malicious code execution.
The operational impact of this vulnerability extends beyond simple bypass of signature-based detection systems, as it allows attackers to execute code that would normally be blocked by the kernel-mode hook handlers. This creates a dangerous scenario where malware can operate undetected by traditional antivirus mechanisms while maintaining elevated privileges. The race condition essentially provides an attack surface where user-space processes can interfere with kernel-mode operations, potentially leading to complete system compromise. The vulnerability affects Windows XP systems specifically, as the kernel security model and hook implementation differ significantly from later Windows versions, making this issue particularly concerning for legacy system environments where patching is not feasible.
The disputed nature of this vulnerability stems from the fundamental question of whether such an issue represents a genuine security flaw or simply an artifact of how protection mechanisms behave when faced with already-executing malicious code. Critics argue that since the attack requires a malicious program to already be running, the vulnerability doesn't represent a true security boundary breach but rather a limitation in how the protection mechanism handles concurrent execution scenarios. However, from a security perspective, this represents a critical flaw in the design of kernel-mode security controls, as it demonstrates that user-space processes can manipulate kernel behavior through carefully timed memory operations. The vulnerability's classification under CWE-362 (Race Condition) highlights the fundamental issue with concurrent access to shared kernel resources without proper synchronization mechanisms.
Mitigation strategies for this vulnerability must address both the immediate kernel-mode hook bypass and the underlying race condition. System administrators should implement strict access controls and disable unnecessary kernel-mode hooking features where possible. The recommended approach involves updating to newer versions of antivirus software that properly handle concurrent access to hook handlers, as well as implementing additional monitoring for suspicious kernel-mode activities. Organizations should also consider deploying behavioral analysis tools that can detect anomalous hook manipulation patterns, as traditional signature-based detection may not identify this type of attack. The vulnerability underscores the importance of proper synchronization in kernel-mode code development and the need for comprehensive security testing of protection mechanisms under concurrent execution scenarios, particularly in legacy environments where such vulnerabilities may persist without adequate patching.