How the CVE Works
CVE-2025-24266 is a critical buffer overflow vulnerability in macOS Ventura, Sequoia, and Sonoma. The flaw occurs due to insufficient bounds checking in a system component, allowing an app to overwrite adjacent memory regions. When exploited, this can lead to arbitrary code execution or system crashes (unexpected termination). Attackers craft malicious input that exceeds allocated buffer limits, corrupting memory structures and potentially hijacking control flow. Apple patched this in versions 13.7.5, 14.7.5, and 15.4 by implementing stricter bounds validation.
DailyCVE Form
Platform: macOS
Version: Ventura/Sequoia/Sonoma
Vulnerability: Buffer Overflow
Severity: Critical
Date: 04/04/2025
What Undercode Say:
Exploitation:
1. Craft a payload exceeding the buffer limit.
2. Trigger the vulnerable function via malicious app.
3. Overwrite return addresses for RCE.
Protection:
1. Update to macOS 13.7.5/14.7.5/15.4.
2. Enable SIP (System Integrity Protection).
3. Audit third-party apps.
Analytics:
- CVSS 4.0 Score: 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
- Exploitability: High (PoC likely).
Commands:
- Check macOS version:
sw_vers -productVersion
- Verify SIP status:
csrutil status
Code Snippet (Crash Trigger):
include <stdio.h>
include <string.h>
void vulnerable_func(char input) {
char buffer[bash];
strcpy(buffer, input); // No bounds check
}
int main() {
char exploit[bash];
memset(exploit, 'A', 127);
exploit[bash] = '\0';
vulnerable_func(exploit);
return 0;
}
Mitigation Code (Bounds Check):
void fixed_func(char input) {
char buffer[bash];
strncpy(buffer, input, sizeof(buffer) - 1);
buffer[bash] = '\0';
}
References:
References:
Reported By: https://nvd.nist.gov/vuln/detail/CVE-2025-24266
Extra Source Hub:
Undercode
