CVE-2024-44132 in macOS
Summary
by MITRE • 09/17/2024
This issue was addressed with improved handling of symlinks. This issue is fixed in macOS Sequoia 15. An app may be able to break out of its sandbox.
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Analysis
by VulDB Data Team • 09/18/2024
The vulnerability identified as CVE-2024-44132 represents a sandbox escape flaw in macOS Sequoia 15 that stems from inadequate handling of symbolic links within the operating system's security framework. This issue specifically affects applications that operate within the sandboxed environment, which is designed to limit their access to system resources and user data. The improper symlink handling creates a pathway for malicious applications to bypass these security restrictions and gain unauthorized access to areas of the system they should not be able to reach.
The technical root cause of this vulnerability lies in how the system processes symbolic links when evaluating file access permissions within sandboxed applications. When an application attempts to traverse or access files through symbolic links, the system fails to properly validate the target paths, allowing attackers to craft malicious symlink structures that can lead to unintended file system access. This flaw operates at the kernel level where file system operations are processed, making it particularly dangerous as it can be exploited by applications that have already been granted sandboxed privileges.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it fundamentally undermines the security model that protects user data and system integrity. An attacker who successfully exploits this vulnerability could potentially access sensitive files, read confidential information, or even modify system components that should remain protected. The implications are particularly severe in environments where multiple applications run with varying levels of trust, as this flaw could enable a low-privilege application to access resources typically restricted to system-level processes. This vulnerability aligns with CWE-274, which addresses improper handling of symbolic links during privilege checking operations.
Security professionals should consider this vulnerability in the context of the ATT&CK framework, specifically under the techniques related to privilege escalation and sandbox evasion. The exploitability of this issue means that attackers could leverage it as part of a broader attack chain, potentially using it to establish persistence or move laterally within a compromised system. The vulnerability's presence in macOS Sequoia 15 indicates that it was introduced in a specific version update and has been addressed through improved symlink handling mechanisms that now properly validate symbolic link targets before granting access. Organizations should prioritize patching systems running affected versions of macOS to prevent exploitation attempts and ensure that all applications continue to operate within their intended sandboxed environments.
The mitigation strategy for this vulnerability requires immediate deployment of the macOS Sequoia 15 update that contains the fixed symlink handling mechanisms. System administrators should also implement monitoring solutions that can detect unusual file system access patterns that might indicate exploitation attempts. Additionally, organizations should conduct security reviews of applications running in sandboxed environments to ensure they are not creating or relying on potentially malicious symlink structures. The fix implemented addresses the core issue by strengthening the validation process for symbolic link operations within the sandbox, ensuring that applications cannot traverse to unauthorized locations through crafted symlink paths. This remediation approach aligns with industry best practices for preventing privilege escalation vulnerabilities and maintaining the integrity of operating system security boundaries.