Overview
The cybersecurity landscape is under continuous evolution, with new vulnerabilities surfacing regularly. One such critical vulnerability, assigned the identifier CVE-2025-43359, has recently been uncovered, affecting multiple Apple operating systems. The significance of this vulnerability lies in its potential to enable attackers to compromise a system or leak sensitive data.
The vulnerability is linked to a logic issue with state management in Apple’s operating systems, such as tvOS, MacOS, iOS, and iPadOS. The flaw can potentially transform a seemingly benign local interface into a wide-open gateway for cyber attackers. The vulnerability is highly critical, with a Common Vulnerability Scoring System (CVSS) Severity Score of 9.8, indicative of its immense impact on affected systems.
Vulnerability Summary
CVE ID: CVE-2025-43359
Severity: Critical; CVSS score: 9.8
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise or data leakage potentially resulting from a successful exploit
Affected Products
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Product | Affected Versions
tvOS | 26
macOS Sonoma | 14.8
macOS Sequoia | 15.7
iOS | 18.7, 26
iPadOS | 18.7, 26
visionOS | 26
watchOS | 26
macOS Tahoe | 26
How the Exploit Works
The vulnerability stems from a logic flaw in the state management of Apple’s operating systems. Specifically, when a UDP server socket is bound to a local interface, it may inadvertently become bound to all interfaces. This enables an attacker to exploit the flaw by sending malicious packets to the UDP server, potentially compromising the system or causing data leakage.
Conceptual Example Code
Here is a conceptual example of how this vulnerability might be exploited. An attacker could send a malicious payload using UDP packets to the server. Please note that this is a simplified illustration and not a real exploit code.
# Attacker's machine
echo -n "malicious_payload" > /dev/udp/target.example.com/1234In this example, “target.example.com” represents the vulnerable server, and “1234” is the UDP port number. The “malicious_payload” is the data that the attacker wants to send to exploit the vulnerability.
