CVE-2018-3903 Information

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 Vector

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

Reference

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

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.9