VDB-123347 · CVE-2018-3916 · GCVE-0-2018-3916

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

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.5	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Samsung SmartThings Hub STH-ETH-250 0.20.17. It has been rated as critical. This issue affects some unknown processing of the component Video-Core HTTP Server. The manipulation as part of HTTP Request leads to memory corruption. This vulnerability is uniquely identified as CVE-2018-3916. Local access is required to approach this attack. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Samsung SmartThings Hub STH-ETH-250 0.20.17 (Router Operating System). This issue affects an unknown function of the component Video-Core HTTP Server. The manipulation 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. The summary by CVE is:

An exploitable stack-based buffer overflow vulnerability exists in the retrieval of database fields in the video-core HTTP server of the Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17. The strcpy call overflows the destination buffer, which has a size of 136 bytes. An attacker can send an arbitrarily long 'directory' value in order to exploit this vulnerability. An attacker can send an HTTP request to trigger this vulnerability.

The bug was discovered 07/26/2018. The weakness was disclosed 08/28/2018 (Website). It is possible to read the advisory at talosintelligence.com. The identification of this vulnerability is CVE-2018-3916 since 01/01/2018. The exploitation is known to be easy. Attacking locally is a requirement. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 33 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.

The entries VDB-124393, VDB-124394 and VDB-124395 are pretty similar. Statistical analysis made it clear that VulDB provides the best quality 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

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/01/2018 🔍
07/26/2018 +205 days 🔍
08/28/2018 +32 days 🔍
08/28/2018 +0 days 🔍
08/29/2018 +1 days 🔍
03/19/2020 +568 days 🔍

Sourcesinfo

Vendor: samsung.com

Advisory: talosintelligence.com
Status: Not defined

CVE: CVE-2018-3916 (🔍)
GCVE (CVE): GCVE-0-2018-3916
GCVE (VulDB): GCVE-100-123347
See also: 🔍

Entryinfo

Created: 08/29/2018 08:34
Updated: 03/19/2020 08:07
Changes: 08/29/2018 08:34 (59), 03/19/2020 08:07 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.