CVE-2006-6959 in Spy_sweeper
Summary
by MITRE
WebRoot Spy Sweeper 4.5.9 and earlier allows local users to bypass the "Startup-Shield" security restrictions by modifying certain registry keys.
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Analysis
by VulDB Data Team • 08/18/2018
The vulnerability identified as CVE-2006-6959 affects WebRoot Spy Sweeper version 4.5.9 and earlier, representing a significant security flaw that undermines the software's intended protection mechanisms. This issue specifically targets the application's "Startup-Shield" feature, which is designed to prevent malicious software from automatically launching at system startup. The vulnerability arises from insufficient validation of registry modifications, allowing local attackers with basic system access to circumvent critical security controls. The flaw demonstrates a fundamental weakness in the application's privilege escalation and access control implementation.
The technical nature of this vulnerability stems from the application's failure to properly validate registry key modifications that are critical for maintaining security restrictions. When WebRoot Spy Sweeper implements its Startup-Shield functionality, it relies on specific registry entries to control which programs can execute automatically at system boot. However, the software does not adequately verify that these registry modifications originate from legitimate sources or that they maintain the expected security properties. This oversight creates an attack vector where local users can directly manipulate these registry entries to disable or bypass the protection mechanisms entirely, effectively removing the security controls that were meant to safeguard the system against persistent threats.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it fundamentally compromises the integrity of the security monitoring system. Local users who exploit this vulnerability can effectively neutralize the software's ability to prevent malicious programs from establishing persistence on the system. This creates a dangerous scenario where attackers can maintain unauthorized access while evading detection by the very security software designed to prevent such activities. The vulnerability undermines the core principle of defense in depth, as it allows attackers to bypass a critical layer of protection that should operate independently of user privileges and system access controls.
From a cybersecurity perspective, this vulnerability aligns with common weaknesses categorized under CWE-284, which addresses improper access control mechanisms. The flaw represents a classic case of insufficient privilege checking during registry modifications, enabling local users to manipulate security-critical system components. The attack pattern associated with this vulnerability maps to techniques described in the MITRE ATT&CK framework under T1064, which covers the creation of persistence mechanisms through registry modifications. Security professionals should recognize this as a critical issue that requires immediate remediation, as it provides attackers with a straightforward method to undermine security controls without requiring elevated privileges or complex exploitation techniques.
The recommended mitigations for this vulnerability include immediate patching of the WebRoot Spy Sweeper application to version 4.6.0 or later, which contains the necessary security fixes. Organizations should also implement comprehensive monitoring of registry modifications related to startup programs, as this will help detect unauthorized changes to security-critical entries. System administrators should consider implementing additional access controls and privilege management measures to limit local user access to registry keys that control security functionality. Furthermore, security teams should conduct regular audits of system configurations to ensure that security software maintains its intended protection capabilities and that no unauthorized modifications have been made to critical system components.