CVE-2024-8885 in Intercept X
Summary
by MITRE • 10/02/2024
A local privilege escalation vulnerability in the Device Encryption component of Sophos Intercept X for Windows older than version 2024.3 allows writing of arbitrary files.
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Analysis
by VulDB Data Team • 10/05/2024
The vulnerability CVE-2024-8885 represents a critical local privilege escalation flaw within Sophos Intercept X for Windows software, specifically affecting versions prior to 2024.3. This issue resides within the device encryption component of the security solution, which is designed to protect endpoints through full disk encryption and other security measures. The vulnerability stems from insufficient access controls and file system permissions within the encryption service, creating an exploitable condition that adversaries can leverage to elevate their privileges from standard user level to system level. The device encryption functionality typically operates with elevated privileges to manage encryption keys and protect system data, but this particular flaw allows unauthorized modification of critical system files through arbitrary write operations.
The technical exploitation of this vulnerability occurs through a flaw in the file handling mechanisms of the device encryption service. Attackers can leverage this weakness to write arbitrary files to protected system directories, potentially including system binaries, configuration files, or encryption key management components. This arbitrary file writing capability enables adversaries to inject malicious code or modify existing security components, effectively bypassing the intended security controls of the Intercept X solution. The vulnerability manifests when the encryption service processes file operations without proper validation of the write destination, allowing a local attacker to specify paths that would normally be restricted to system processes. This type of flaw aligns with CWE-276, which describes improper permissions for a resource, and represents a classic case of insufficient access control that permits unauthorized modification of system-critical components.
The operational impact of CVE-2024-8885 extends beyond simple privilege escalation, as it fundamentally undermines the security posture of systems running affected versions of Sophos Intercept X. Once an attacker achieves system-level privileges through this vulnerability, they can manipulate the encryption service itself, potentially disabling or bypassing encryption protections entirely. This creates a dangerous scenario where the very security tool designed to protect the system becomes a vector for further compromise. The vulnerability enables attackers to modify the device encryption service configuration, inject malicious code into the encryption process, or even create backdoors that persist across system reboots. From an adversarial perspective, this vulnerability fits well within the ATT&CK framework under the privilege escalation tactic, specifically leveraging techniques such as exploitation for privilege escalation and persistence mechanisms. The impact is particularly severe in enterprise environments where Sophos Intercept X is widely deployed, as a single compromised endpoint could provide attackers with elevated access to multiple system resources.
Organizations affected by CVE-2024-8885 should implement immediate mitigation strategies while planning for comprehensive remediation. The primary and most effective mitigation involves upgrading to Sophos Intercept X version 2024.3 or later, which includes patched file handling mechanisms and strengthened access controls for the device encryption component. Security administrators should also conduct thorough inventory assessments to identify all systems running vulnerable versions of the software and prioritize their remediation. Additional defensive measures include implementing strict file system permissions, monitoring for unauthorized file modifications in system directories, and reviewing access control policies for encryption services. Network segmentation and principle of least privilege should be enforced to limit the potential blast radius of exploitation. From a monitoring perspective, security teams should establish alerts for suspicious file write operations to protected system directories, particularly those related to encryption services. The vulnerability demonstrates the critical importance of maintaining up-to-date security software and highlights the risks associated with running legacy versions of endpoint protection platforms that may contain unpatched security flaws.