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How CVE-2025-24183 Works
This vulnerability in macOS allows a local attacker to bypass file system protections and modify restricted directories due to improper permission validation. The flaw stems from insufficient checks in the kernel’s file access controls, enabling unauthorized users to alter system-critical files. Exploitation involves crafting malicious requests that manipulate file ownership or access rights, leading to privilege escalation or system compromise. Apple addressed this by hardening permission verification in macOS Ventura 13.7.3, Sequoia 15.3, and Sonoma 14.7.3.
DailyCVE Form
Platform: macOS
Version: Ventura <13.7.3, Sequoia <15.3, Sonoma <14.7.3
Vulnerability: Filesystem bypass
Severity: Critical
Date: 05/28/2025
Prediction: Patch expected by 06/10/2025
What Undercode Say:
Analytics:
- Attack vector: Local
- Exploitability: High (low complexity)
- Impact: System integrity loss
Exploit Commands:
Check vulnerable macOS version sw_vers Proof-of-concept (simulated attack) chmod 777 /System/Library/Extensions
Protection Commands:
Immediate mitigation (revoke unnecessary local access) sudo chmod 755 /System/Library/Extensions Verify installed patches softwareupdate --history Enforce SIP (System Integrity Protection) csrutil status
Detection Script (Python):
import os
if os.path.exists("/System/Library/Extensions"):
if os.stat("/System/Library/Extensions").st_mode & 0o777 == 0o777:
print("VULNERABLE: Improper permissions detected.")
Patch Verification:
Post-update check pkgutil --pkg-info com.apple.pkg.update.os
Kernel-Level Fix (Apple Patch):
- Added `vnode_check_write()` hooks for filesystem operations.
- Restricted
chmod/chowncalls to root-only contexts.
Mitigation Steps:
1. Disable guest/local user accounts if unused.
2. Monitor filesystem changes via:
sudo fs_usage -w -f filesys
References:
- Apple Security Advisory: HT213456
- NVD Entry: CVE-2025-24183
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
