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CVE Record

CVE-2018-3867: An exploitable stack-based buffer overflow vulnerability exists in the samsungWifiScan callback notificatio...

An exploitable stack-based buffer overflow vulnerability exists in the samsungWifiScan callback notification 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 handles the answer received from a smart camera, leading to a buffer overflow on the stack. An attacker can send a series of HTTP requests to trigger this vulnerability.

CriticalCVSS 9.9Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

CVE-2018-3867 is a critical flaw in Samsung SmartThings Hub STH-ETH-250 firmware 0.20.17. A network attacker with low privileges could trigger a stack buffer overflow in the hub's video-core HTTP server, potentially compromising the device's confidentiality, integrity, and availability.

Executive priority

Treat this as urgent for environments using the affected hub and firmware. The impact rating is critical, but business priority depends on whether these consumer IoT devices are present and reachable in the environment.

Technical view

The flaw is in the samsungWifiScan callback notification path. The video-core process incorrectly handles a smart camera response, causing a stack-based buffer overflow. The CVSS 3.0 score is 9.9, with network access, low complexity, low privileges, no user interaction, and high impact across CIA.

Likely exposure

Exposure is limited to Samsung SmartThings Hub STH-ETH-250 devices running firmware 0.20.17, based on the provided sources. Organizations should verify deployed hub models and firmware versions before assuming exposure.

Exploitation context

Talos describes the vulnerability as exploitable and triggerable through a series of HTTP requests. The provided data does not show CISA KEV listing or active exploitation evidence, so active exploitation should not be assumed.

Researcher notes

The source bundle names one affected product and firmware version. It does not provide CWE mapping, patch details, or active exploitation evidence. Avoid broadening scope beyond STH-ETH-250 firmware 0.20.17 without additional vendor confirmation.

Mitigation direction

  • Identify any Samsung SmartThings Hub STH-ETH-250 devices in use.
  • Confirm whether devices are running firmware version 0.20.17.
  • Check Samsung or Talos guidance for fixed firmware or vendor remediation.
  • Restrict hub management and device network access to trusted networks.
  • Segment IoT hubs from sensitive corporate or home-office systems.

Validation and detection

  • Inventory SmartThings hubs by model and firmware version.
  • Review network exposure of the hub's HTTP-accessible services.
  • Check whether untrusted users or devices can reach the hub network.
  • Confirm remediation status against Samsung or Talos advisory details.
  • Document any compensating controls if firmware remediation is unavailable.
Prepared
Confidence
high
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2018-3867 mapping review

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Vulnerability profileCVE Program record
Severity
Critical
CVSS
9.9 (3.0)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
9.9CVSS 3.0CriticalCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H3.16Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

9.9Critical
CVSS 3.0 vector shape for CVE-2018-3867Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
SamsungSmartThings Hub STH-ETH-250Firmware version 0.20.17Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.