VDB-123348 · CVE-2018-3926 · BID 105162

Samsung SmartThings Hub STH-ETH-250 0.20.17 hubCore Process integer underflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.7$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Samsung SmartThings Hub STH-ETH-250 0.20.17. Impacted is an unknown function of the component hubCore Process. The manipulation results in integer underflow. This vulnerability was named CVE-2018-3926. The attack needs to be approached locally. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Samsung SmartThings Hub STH-ETH-250 0.20.17 (Router Operating System). Affected is an unknown functionality of the component hubCore Process. The manipulation with an unknown input leads to a integer underflow vulnerability. CWE is classifying the issue as CWE-191. The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result. This is going to have an impact on availability. CVE summarizes:

An exploitable integer underflow vulnerability exists in the ZigBee firmware update routine of the hubCore binary of the Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17. The hubCore process incorrectly handles malformed files existing in its data directory, leading to an infinite loop, which eventually causes the process to crash. An attacker can send an HTTP request to trigger this vulnerability.

The bug was discovered 07/26/2018. The weakness was presented 08/28/2018 by Cisco with Cisco Talos (Website). The advisory is shared for download at securityfocus.com. This vulnerability is traded as CVE-2018-3926 since 01/01/2018. The exploitability is told to be easy. The attack needs to be approached locally. The exploitation doesn't require any form of 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 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 vulnerability is also documented in the vulnerability database at SecurityFocus (BID 105162†). See VDB-123347, VDB-123346 and VDB-123345 for similar entries. Once again VulDB remains the best source for vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.7
VulDB Meta Temp Score: 4.7

VulDB Base Score: 3.3
VulDB Temp Score: 3.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CNA Base Score: 5.3
CNA Vector (Talos): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Integer underflow
CWE: CWE-191 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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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 🔍
08/26/2018 +31 days 🔍
08/28/2018 +1 days 🔍
08/28/2018 +0 days 🔍
08/29/2018 +1 days 🔍
05/06/2023 +1711 days 🔍

Sourcesinfo

Vendor: samsung.com

Advisory: securityfocus.com⛔
Researcher: Cisco
Organization: Cisco Talos
Status: Not defined

CVE: CVE-2018-3926 (🔍)
GCVE (CVE): GCVE-0-2018-3926
GCVE (VulDB): GCVE-100-123348
SecurityFocus: 105162 - Samsung SmartThings Hub CVE-2018-3926 Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 08/29/2018 08:34
Updated: 05/06/2023 08:18
Changes: 08/29/2018 08:34 (61), 03/19/2020 08:11 (4), 05/06/2023 08:18 (14)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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