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CVE-2018-3905: An exploitable buffer overflow vulnerability exists in the camera "create" feature of video-core's HTTP ser...

An exploitable buffer overflow vulnerability exists in the camera "create" 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 "state" 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.

HighCVSS 8.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This issue affects Samsung SmartThings Hub STH-ETH-250 devices running firmware 0.20.17. A flaw in the hub’s video-core HTTP server can let an authenticated network attacker trigger a stack buffer overflow through the camera creation feature, risking device compromise and loss of confidentiality, integrity, and availability.

Executive priority

Prioritize remediation where affected hubs exist in business or sensitive network environments. The score is high and impact is broad, but sources require low privileges and do not confirm active exploitation.

Technical view

The vulnerability is a stack-based buffer overflow in video-core’s HTTP server. The process incorrectly extracts the user-controlled JSON "state" field during camera creation. CVSS 3.0 rates it 8.5 with network attack vector, high complexity, low privileges, no user interaction, changed scope, and high C/I/A impact.

Likely exposure

Exposure is limited to Samsung SmartThings Hub STH-ETH-250 devices on firmware 0.20.17 where the vulnerable video-core HTTP server functionality is reachable by a low-privileged attacker.

Exploitation context

The provided sources describe exploitability via an HTTP request, but they do not show KEV listing or cite active exploitation. Treat it as a serious authenticated network attack surface, not as confirmed in-the-wild exploitation.

Researcher notes

Focus validation on exact model and firmware match, reachability of video-core HTTP server paths, and privilege requirements. Do not assume other SmartThings models or firmware versions are affected unless separately confirmed by vendor or CVE evidence.

Mitigation direction

  • Inventory Samsung SmartThings Hub STH-ETH-250 devices and confirm firmware versions.
  • Check Samsung SmartThings and Talos guidance for available firmware updates or mitigations.
  • Restrict access to hub HTTP services to trusted networks and users.
  • Segment affected hubs from sensitive systems until vendor guidance is applied.
  • Retire or isolate firmware 0.20.17 devices if no supported update is available.

Validation and detection

  • Confirm whether any STH-ETH-250 hubs are running firmware version 0.20.17.
  • Verify vulnerable video-core HTTP functionality is not reachable from untrusted networks.
  • Review access controls for users able to interact with the hub’s HTTP services.
  • Check vendor advisories or device management interfaces for update status.
  • Monitor logs for unusual camera creation or hub HTTP activity.
Prepared
Confidence
medium
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-2018-3905 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
8.5 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AV:N/AC:H/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
8.5CVSS 3.0HighCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H1.86Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

8.5High
CVSS 3.0 vector shape for CVE-2018-3905Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:N/AC:H/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.