CVE-2022-3369 in Engines
Summary
by MITRE • 11/01/2022
An Improper Access Control vulnerability in the bdservicehost.exe component, as used in Bitdefender Engines for Windows, allows an attacker to delete privileged registry keys by pointing a Registry symlink to a privileged key. This issue affects: Bitdefender Engines versions prior to 7.92659. It also affects Bitdefender Antivirus Free, Bitdefender Antivirus Plus, Bitdefender Internet Security, Bitdefender Total Security, as well as Bitdefender Endpoint Security Tools for Windows with engine versions prior to 7.92659.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 09/17/2024
The CVE-2022-3369 vulnerability represents a critical improper access control flaw within Bitdefender's Windows security infrastructure, specifically targeting the bdservicehost.exe component that serves as the core engine service for Bitdefender's antivirus solutions. This vulnerability stems from insufficient validation of registry symlink operations, creating a path traversal condition that allows unauthorized privilege escalation. The flaw specifically affects Bitdefender's engine versions prior to 7.92659 and impacts multiple consumer and enterprise security products including Bitdefender Antivirus Free, Plus, Internet Security, Total Security, and Endpoint Security Tools for Windows. The vulnerability operates through a sophisticated attack vector that exploits the service's handling of registry operations, where an attacker can manipulate symlink targets to gain access to privileged registry keys that should normally be restricted to system-level processes.
The technical implementation of this vulnerability involves the exploitation of weak symlink validation within the bdservicehost.exe process, which operates with elevated privileges due to its role in system-level security operations. When the service processes registry operations, it fails to properly validate whether symlink targets point to privileged registry locations, allowing an attacker to create malicious symlinks that redirect operations to sensitive system registry keys. This creates a privilege escalation pathway where unprivileged users can effectively manipulate system registry entries that contain critical security configurations, policy settings, and other privileged data structures. The vulnerability aligns with CWE-284, which addresses improper access control, and specifically demonstrates how insufficient access control checks can lead to unauthorized modification of system-critical components. The attack requires an attacker to have local access to the system and the ability to create registry symlinks, but the impact is severe due to the elevated privileges of the bdservicehost.exe process.
The operational impact of CVE-2022-3369 extends beyond simple privilege escalation to potentially compromise the entire security posture of affected systems. An attacker who successfully exploits this vulnerability can delete or modify privileged registry keys that contain critical security policies, endpoint protection configurations, and other system-level settings that govern how Bitdefender operates. This could result in complete bypass of security controls, disabling of critical protection mechanisms, or modification of security policies that would allow further malicious activity to go undetected. The vulnerability affects both consumer and enterprise security products, meaning that organizations using Bitdefender's endpoint security solutions could experience significant security degradation, potentially allowing attackers to establish persistent footholds or disable security monitoring capabilities. From an ATT&CK framework perspective, this vulnerability maps to privilege escalation techniques and can enable further lateral movement or persistence within compromised environments, as the attacker gains access to registry keys that may contain security configuration data or authentication tokens.
Mitigation strategies for CVE-2022-3369 focus on immediate patching of affected Bitdefender engine versions to 7.92659 or later, which addresses the improper access control validation in bdservicehost.exe. Organizations should also implement additional monitoring of registry operations, particularly around privileged key locations, to detect potential exploitation attempts. System administrators should review and harden registry permissions for critical security keys, ensuring that only authorized processes can modify sensitive registry entries. Network segmentation and principle of least privilege should be enforced to limit the potential impact of successful exploitation, while endpoint detection and response solutions should be configured to alert on suspicious registry symlink creation activities. The vulnerability highlights the importance of proper access control validation in privileged system services and demonstrates how seemingly minor implementation flaws can lead to significant security implications. Security teams should also consider conducting comprehensive vulnerability assessments of other security software components to identify similar access control weaknesses that could be exploited in similar ways. Regular security updates and patch management processes become critical in preventing exploitation of such vulnerabilities, as the window for exploitation exists only until the affected components are updated to versions that properly validate registry operations and prevent symlink-based privilege escalation attacks.