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

Summaryinfo

A vulnerability, which was classified as critical, was found in Samsung SmartThings Hub STH-ETH-250 0.20.17. Affected is an unknown function of the component Video-Core Process. Such manipulation of the argument URL as part of HTTP Request leads to memory corruption. This vulnerability is listed as CVE-2018-3902. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in Samsung SmartThings Hub STH-ETH-250 0.20.17 (Router Operating System) and classified as critical. Affected by this issue is some unknown functionality of the component Video-Core Process. The manipulation of the argument URL as part of a HTTP Request leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

An exploitable buffer overflow vulnerability exists in the camera "replace" feature of video-core's HTTP server of Samsung SmartThings Hub STH-ETH-250 devices with firmware version 0.20.17. The video-core process incorrectly extracts the URL field 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 presented 08/23/2018 (Website). The advisory is shared for download at talosintelligence.com. This vulnerability is handled as CVE-2018-3902 since 01/01/2018. The exploitation is known to be easy. The attack may be launched remotely. A simple authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 28 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

See VDB-123192, VDB-123190, VDB-123189 and VDB-123187 for similar entries. 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/

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Once again VulDB remains the best source for vulnerability data.

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