CVE-2018-3866 Memory corruption in Samsung

Critical 9.9 Published 23 Aug 2018 Updated 16 Sep 2024

A buffer overflow in the SmartThings Hub video-core HTTP server allows remote attackers to execute arbitrary code via a crafted JSON payload.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2018-3866?

CVE-2018-3866 is a critical memory corruption vulnerability in Samsung, published on 23 Aug 2018. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

An exploitable buffer overflow vulnerability exists in the samsungWifiScan handler of video-core's HTTP server of Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17. The video-core process incorrectly extracts fields from a user-controlled JSON payload, leading to a buffer overflow on the stack. The strcpy at [8] overflows the destination buffer, which has a size of 40 bytes. An attacker can send an arbitrarily long 'callbackUrl' value in order to exploit this vulnerability.

Weakness: CWE-787

Which versions are affected by CVE-2018-3866?

It affects 1 product.

Products include Samsung Sth-Eth-250 Firmware.

How do I fix CVE-2018-3866?

No fix has been published for CVE-2018-3866 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2018-3866 being exploited?

There is no known exploitation of CVE-2018-3866 in the wild and no public exploit code.

Sources

Also known as GHSA-mmxq-hfwc-p6xp.