CVE-2018-3903 — CRITICAL (9.9)

Vulnerability Description

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. The memcpy call overflows the destination buffer, which has a size of 512 bytes. An attacker can send an arbitrarily long "url" value in order to overwrite the saved-PC with 0x42424242.

CVSS Score

9.9

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Samsung	Sth-Eth-250 Firmware	0.20.17
Samsung	Sth-Eth-250	-

Related Weaknesses (CWE)

CWE-787

References

https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0574ExploitThird Party Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0574ExploitThird Party Advisory

FAQ

What is CVE-2018-3903?

CVE-2018-3903 is a vulnerability with a CVSS score of 9.9 (CRITICAL). 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 th...

How severe is CVE-2018-3903?

CVE-2018-3903 has been rated CRITICAL with a CVSS base score of 9.9/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2018-3903?

Check the references section above for vendor advisories and patch information. Affected products include: Samsung Sth-Eth-250 Firmware, Samsung Sth-Eth-250.