On Samsung SmartThings Hub STH-ETH-250 devices with firmware version 0.20.17, the video-core process incorrectly extracts fields from a use…

Published 8 y ago 2018-08-23 · modified 4 mo ago 2026-06-17 · JSON

CVSS

9.9

v3.0 · CNA

CISA KEV

not known exploited

EPSS

1.7%

percentile 78%

Public exploits

none known

On Samsung SmartThings Hub STH-ETH-250 devices with 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. An attacker can send an HTTP request to trigger this vulnerability. A strcpy overflows the destination buffer, which has a size of 40 bytes. An attacker can send an arbitrarily long "user" value in order to exploit this vulnerability.

Exploit prediction (EPSS)

1.74% probability of exploitation in the next 30 days, higher than 78% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
CNA	3.0	9.9	`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`
NVD	3.1	9.9	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`
CNA	3.0	9.9	`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`
NVD	2.0	9.0	`AV:N/AC:L/Au:S/C:C/I:C/A:C`

Affected products

Samsung SmartThings Hub STH-ETH-250

Classification

Weakness

CWE-787 Out-of-bounds Write

References

talosintelligence.com /vulnerability_reports/TALOS-2018-0548 · x_refsource_MISC, x_transferred

Sources

CVE List: CVE-2018-3863
NVD: CVE-2018-3863

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.