CVE-2022-23714 in Endpoint Security
Summary
by MITRE • 07/06/2022
A local privilege escalation (LPE) issue was discovered in the ransomware canaries features of Elastic Endpoint Security for Windows, which could allow unprivileged users to elevate their privileges to those of the LocalSystem account.
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Analysis
by VulDB Data Team • 07/19/2022
The vulnerability identified as CVE-2022-23714 represents a critical local privilege escalation flaw within Elastic Endpoint Security for Windows, specifically affecting the ransomware canaries functionality. This issue resides in the Windows operating system environment and exploits a weakness in how the security solution handles certain privileged operations. The flaw allows attackers with standard user privileges to escalate their access rights to the highest possible level, known as the LocalSystem account, which possesses unrestricted access to all system resources and data. This type of vulnerability directly undermines the fundamental security model of Windows systems where user privileges should remain strictly separated from system-level access. The vulnerability stems from improper privilege management within the Elastic Endpoint Security implementation, creating an attack surface that malicious actors can exploit to gain unauthorized administrative control over affected systems.
The technical implementation of this vulnerability involves a specific flaw in the ransomware canaries feature of Elastic Endpoint Security, which is designed to detect and respond to ransomware attacks by monitoring for suspicious file access patterns. The flaw occurs when the system processes certain privileged operations that should only be executable by the LocalSystem account, but due to inadequate access control mechanisms, unprivileged users can trigger these operations through carefully crafted inputs or system interactions. This represents a classic case of insufficient privilege separation where the security boundary between user and system contexts has been compromised. The vulnerability is particularly concerning because it allows for complete system compromise without requiring any specialized exploitation tools or advanced knowledge of system internals, making it highly accessible to threat actors with minimal technical expertise.
From an operational standpoint, this vulnerability creates a severe risk to organizations relying on Elastic Endpoint Security for Windows, as it provides a pathway for attackers to bypass endpoint protection mechanisms entirely. The LocalSystem account has unrestricted access to all system components, including the ability to modify system files, install malicious software, access encrypted data, and potentially exfiltrate sensitive information. This privilege escalation allows threat actors to maintain persistence, escalate their operations, and avoid detection by standard security monitoring tools that may not be designed to detect such internal privilege abuse. The impact extends beyond individual system compromise to potentially enable lateral movement within network environments, as attackers with LocalSystem access can leverage this elevated privilege to access other systems and resources. Organizations using Elastic Endpoint Security may find their security investments undermined by this vulnerability, as attackers can effectively bypass the very protection mechanisms designed to prevent such attacks.
Mitigation strategies for CVE-2022-23714 should focus on immediate patching of affected Elastic Endpoint Security versions, as this represents the most effective defense against exploitation. Organizations should also implement additional monitoring for suspicious privilege escalation attempts and ensure that the affected systems are isolated from critical network segments until patches are applied. The vulnerability aligns with CWE-276, which describes inadequate privilege management, and maps to ATT&CK technique T1068, which covers local privilege escalation. Security teams should conduct thorough assessments of their Elastic Endpoint Security configurations to identify any other potential privilege escalation vectors and implement principle of least privilege controls. Additionally, organizations should consider deploying additional security controls such as application whitelisting and enhanced monitoring of system calls to detect anomalous behavior that might indicate exploitation attempts. Regular vulnerability assessments and penetration testing should be performed to identify similar privilege escalation vulnerabilities in other security solutions and system components, ensuring comprehensive protection against similar threats that may exist in the broader attack surface.