CVE-2020-8092 in BitDefender
Summary
by MITRE
A privilege escalation vulnerability in BDLDaemon as used in Bitdefender Antivirus for Mac allows a local attacker to obtain authentication tokens for requests submitted to the Bitdefender Cloud. This issue affects: Bitdefender Bitdefender Antivirus for Mac versions prior to 8.0.0.
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Analysis
by VulDB Data Team • 03/27/2024
The vulnerability CVE-2020-8092 represents a critical privilege escalation flaw within BDLDaemon, a component of Bitdefender Antivirus for Mac that operates with elevated privileges on the system. This daemon serves as a bridge between the antivirus software and the Bitdefender Cloud services, handling authentication and communication processes that require elevated system permissions. The flaw exists in versions prior to 8.0.0, indicating that Bitdefender had not yet addressed this security weakness in their client software. The vulnerability specifically targets the daemon's handling of authentication tokens, which are essential for maintaining secure communication with Bitdefender's cloud infrastructure and for performing administrative functions within the antivirus system.
The technical implementation of this privilege escalation vulnerability stems from improper access controls and insufficient validation within the BDLDaemon service. When local attackers exploit this flaw, they can manipulate the daemon to generate or obtain authentication tokens that would normally be restricted to authorized system processes. This occurs because the daemon fails to properly verify the identity and privileges of processes attempting to access its authentication mechanisms. The vulnerability enables attackers to escalate their privileges from standard user level to that of the daemon, which operates with system-level permissions, thereby gaining unauthorized access to cloud communication channels. This issue is classified as a privilege escalation vulnerability under CWE-269, which specifically addresses insufficient privileges in software systems. The weakness manifests when the daemon improperly handles token generation requests, allowing unauthorized processes to obtain valid authentication credentials.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it provides attackers with the ability to interact with Bitdefender's cloud services using legitimate authentication tokens. This means that malicious actors could potentially access cloud-based antivirus services, submit false reports, or even manipulate threat detection and response mechanisms. The implications are particularly severe because Bitdefender's cloud infrastructure provides centralized threat intelligence and management capabilities that are crucial for maintaining security across multiple endpoints. Attackers could leverage these tokens to bypass cloud-based security controls, potentially leading to data exfiltration, false positive reporting, or even the ability to remotely control or manipulate the antivirus system's cloud configuration. This vulnerability creates a significant attack surface that could be exploited to undermine the entire Bitdefender security ecosystem, as the cloud communications represent a critical component of the antivirus solution's functionality.
Mitigation strategies for CVE-2020-8092 require immediate action to upgrade to Bitdefender Antivirus for Mac version 8.0.0 or later, which contains the necessary patches to address the privilege escalation flaw. System administrators should implement comprehensive monitoring of the BDLDaemon process to detect any unusual authentication token requests or access patterns that might indicate exploitation attempts. The vulnerability aligns with ATT&CK technique T1068, which covers privilege escalation through local exploitation, and T1566, which addresses credential harvesting through exploitation of software vulnerabilities. Organizations should also consider implementing additional security controls such as process monitoring, file integrity checking, and network traffic analysis to detect potential exploitation attempts. The patch for this vulnerability specifically addresses the improper access control mechanisms within BDLDaemon, ensuring that authentication token generation and access controls properly validate process privileges. Security teams should conduct thorough assessments of systems running vulnerable versions to identify any potential compromise and implement layered defenses to protect against similar vulnerabilities in other system components.