CVE-2021-1751: 
macOS vulnerability analysis and mitigation

CVE-2021-1751 is a security vulnerability affecting macOS operating systems that was discovered and patched in early 2021. The vulnerability was identified in the NetFSFramework component and affects macOS Big Sur 11.0.1, macOS Catalina 10.15.7, and macOS Mojave 10.14.6. The issue was reported by Mikko Kenttälä (@Turmio_) of SensorFu (Apple Security).

The vulnerability is characterized as a logic issue in the NetFSFramework component of macOS. The security flaw stems from improper state management when handling Samba network shares. The vulnerability has been assigned a CVSS v3.1 Base Score of 7.8 (HIGH) with the vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (NVD).

When exploited, this vulnerability could allow an attacker to execute arbitrary code on the target system through a maliciously crafted Samba network share. This could potentially lead to unauthorized access and compromise of the affected system (Apple Security).

Apple addressed this vulnerability by improving state management in the affected component. The fix was released as part of macOS Big Sur 11.2, Security Update 2021-001 Catalina, and Security Update 2021-001 Mojave. Users are advised to update their systems to these versions or later to protect against this vulnerability (Apple Security).