CVE-2007-1330 in Personal Firewall
Summary
by MITRE
Comodo Firewall Pro (CFP) (formerly Comodo Personal Firewall) 2.4.18.184 and earlier allows local users to bypass driver protections on the HKLM\SYSTEM\Software\Comodo\Personal Firewall registry key by guessing the name of a named pipe under \Device\NamedPipe\OLE and attempting to open it multiple times.
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Analysis
by VulDB Data Team • 10/12/2017
Comodo Firewall Pro version 2.4.18.184 and earlier contains a critical privilege escalation vulnerability that stems from improper access control mechanisms within its kernel driver components. This vulnerability exists in the registry key HKLM\SYSTEM\Software\Comodo\Personal Firewall which is protected by the firewall driver but fails to properly validate access permissions for named pipe communication. The flaw manifests when local users can exploit a predictable naming pattern for named pipes under the \Device\NamedPipe\OLE namespace to guess and access the protected registry key. This vulnerability represents a direct violation of the principle of least privilege and demonstrates a fundamental flaw in the driver's security model.
The technical exploitation of this vulnerability relies on the predictable naming scheme of named pipes within the Windows operating system namespace, specifically within the OLE (Object Linking and Embedding) communication framework. Attackers can enumerate and attempt to connect to named pipes that are not properly secured, allowing them to gain unauthorized access to the Comodo firewall driver's registry key. This approach leverages the fact that the driver does not implement robust access control checks for named pipe connections, enabling local users to bypass the intended protection mechanisms. The vulnerability is classified as a privilege escalation flaw that allows a local attacker to gain elevated privileges within the system's security framework.
The operational impact of this vulnerability is significant as it allows local users to bypass critical firewall protections that are designed to prevent unauthorized modifications to the system's security configuration. Once exploited, attackers can modify firewall rules, disable security features, or gain access to sensitive system information that should only be accessible to authorized administrators. This vulnerability undermines the core security model of the Comodo Personal Firewall by allowing unauthorized modification of its own configuration parameters, creating a potential attack vector that could lead to complete system compromise. The attack requires minimal privileges and can be executed through simple enumeration and connection attempts to the named pipes.
The vulnerability aligns with CWE-284 (Improper Access Control) and represents a classic case of weak access control in kernel-mode drivers. From an ATT&CK framework perspective, this vulnerability maps to privilege escalation techniques and specifically targets the T1068 (Local Privilege Escalation) and T1562.001 (Impair Defenses) tactics. The attack pattern demonstrates how insufficient access controls in system-level components can be exploited to undermine the integrity of security software itself. Organizations should implement immediate mitigations including updating to patched versions of Comodo Firewall Pro, implementing proper access control policies for named pipes, and monitoring for unauthorized access attempts to system registry keys. Additionally, system administrators should conduct security audits to identify and remediate similar access control vulnerabilities in other security software components.