How the CVE Works:
CVE-2025-31203 is an integer overflow vulnerability in Apple’s macOS, iOS, and related operating systems. The flaw occurs due to insufficient input validation when processing network packets. An attacker on the same local network can send specially crafted packets, triggering an integer overflow in the affected component. This overflow leads to incorrect memory allocation, potentially causing a denial-of-service (DoS) condition by crashing the system or degrading performance. The vulnerability is mitigated in updated versions of macOS Sequoia, iOS, and other Apple OS releases.
DailyCVE Form:
Platform: Apple OS Family
Version: Pre-Sequoia 15.4, Pre-Sonoma 14.7.5
Vulnerability: Integer Overflow
Severity: Medium
Date: 05/05/2025
What Undercode Say:
Exploitation:
- Craft malicious network packets with oversized integer values.
- Send packets to target device on the same local network.
- Trigger memory corruption via integer wrap-around.
Protection:
- Apply Apple security updates (macOS 15.4+, iOS 18.4+).
- Restrict local network access via firewall rules.
Analytics:
- CVSS:4.0 Vector: `CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`
– Exploitability: Low (requires local network access).
Commands:
- Check macOS version:
sw_vers -productVersion
- Block suspicious LAN traffic (macOS):
sudo pfctl -e echo "block in from any to any" | sudo pfctl -f -
Code Snippet (Detection):
include <stdint.h>
void validate_input(uint32_t input) {
if (input > UINT32_MAX - 1024) {
printf("Integer overflow attempt detected.\n");
exit(1);
}
}
Mitigation:
- Disable unnecessary network services:
sudo launchctl unload -w /System/Library/LaunchDaemons/<service>.plist
- Monitor logs for DoS attempts:
log show --predicate 'eventMessage contains "network"' --last 24h
(End of Report)
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
