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CVE Record

CVE-2018-3895: An exploitable buffer overflow vulnerability exists in the /cameras/XXXX/clips handler of video-core's HTTP...

An exploitable buffer overflow vulnerability exists in the /cameras/XXXX/clips handler of video-core's HTTP server of Samsung SmartThings Hub STH-ETH-250 Firmware version 0.20.17. The strncpy call overflows the destination buffer, which has a size of 52 bytes. An attacker can send an arbitrarily long 'endTime' value in order to exploit this vulnerability. An attacker can send an HTTP request 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

This CVE affects Samsung SmartThings Hub STH-ETH-250 firmware 0.20.17. A flaw in a camera clips HTTP handler can corrupt memory when it receives an overly long endTime value. The published severity is critical because a network attacker with low privileges could potentially compromise confidentiality, integrity, and availability.

Executive priority

Treat this as urgent for environments still using the affected hub firmware. The business risk is high-impact device compromise, but prioritization should focus on confirmed deployed devices and reachable services.

Technical view

The issue is a buffer overflow in video-core's HTTP server, specifically the /cameras/XXXX/clips handler. A strncpy call can overflow a 52-byte destination buffer when processing endTime. CVSS 3.0 is 9.9 with network attack vector, low complexity, low privileges required, no user interaction, and scope changed.

Likely exposure

Exposure is limited to Samsung SmartThings Hub STH-ETH-250 devices running firmware 0.20.17, especially where the relevant HTTP service is reachable from untrusted or broad internal networks.

Exploitation context

The CVE record says an attacker can trigger the issue with an HTTP request. The provided data does not show CISA KEV listing or confirmed active exploitation, so active exploitation should not be assumed.

Researcher notes

Evidence identifies the vulnerable handler, parameter, buffer size, affected firmware, and CVSS vector. The source bundle does not provide a confirmed patch version, exploit-in-the-wild evidence, or broader affected product range.

Mitigation direction

  • Check Samsung guidance for fixed firmware or official mitigation.
  • Inventory SmartThings Hub STH-ETH-250 devices and firmware versions.
  • Restrict hub HTTP service access to trusted management networks.
  • Remove affected devices from untrusted network segments where feasible.
  • Monitor vendor advisories before declaring remediation complete.

Validation and detection

  • Confirm whether any STH-ETH-250 hubs run firmware 0.20.17.
  • Review network reachability to the hub HTTP service.
  • Check logs for unusual camera clips requests or oversized parameters.
  • Verify compensating network controls block untrusted access.
  • Document remediation status for each affected hub.
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-2018-3895 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-2018-3895Attack 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
SamsungSamsungSamsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17Listed
Weakness

CWE details

No CWE listed

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