Samsung SmartThings Hub STH-ETH-250 0.20.17 Video-Core Process HTTP Request memory corruption

Summaryinfo

A vulnerability categorized as critical has been discovered in Samsung SmartThings Hub STH-ETH-250 0.20.17. This issue affects some unknown processing of the component Video-Core Process. Executing a manipulation as part of HTTP Request can lead to memory corruption. This vulnerability is tracked as CVE-2018-3904. The attack can be launched remotely. No exploit exists. The application of restrictive firewalling is recommended.

Detailsinfo

A vulnerability classified as critical was found in Samsung SmartThings Hub STH-ETH-250 0.20.17 (Router Operating System). This vulnerability affects an unknown functionality of the component Video-Core Process. The manipulation as part of a HTTP Request leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

An exploitable buffer overflow vulnerability exists in the camera 'update' feature 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. An attacker can send an HTTP request to trigger this vulnerability.

The bug was discovered 07/26/2018. The weakness was disclosed 08/27/2018 (Website). The advisory is shared for download at talosintelligence.com. This vulnerability was named CVE-2018-3904 since 01/01/2018. The exploitation appears to be easy. The attack can be initiated remotely. The successful exploitation needs a single authentication. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 32 days. During that time the estimated underground price was around $0-$5k.

Proper firewalling of is able to address this issue.

The entries VDB-123294, VDB-123291 and VDB-123293 are pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• Samsung

Name

• SmartThings Hub STH-ETH-250

Version

• 0.20.17

License

• open-source

Website

• Vendor: https://www.samsung.com/

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Once again VulDB remains the best source for vulnerability data.

Discussion