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CVE-2018-3879: An exploitable JSON injection vulnerability exists in the credentials handler of video-core's HTTP server o...

An exploitable JSON injection vulnerability exists in the credentials handler 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 parses the user-controlled JSON payload, leading to a JSON injection which in turn leads to a SQL injection in the video-core database. An attacker can send a series of HTTP requests to trigger this vulnerability.

HighCVSS 8.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2018-3879 affects a specific Samsung SmartThings Hub firmware. A low-privileged network attacker could abuse the hub’s HTTP credentials handling to corrupt database queries, risking confidentiality, integrity, and availability of the device’s video-core database.

Executive priority

Treat as high priority where affected hubs exist, especially in networks connected to sensitive systems. The practical urgency depends on confirmed device presence, firmware version, and network reachability.

Technical view

The video-core HTTP server credentials handler on Samsung SmartThings Hub STH-ETH-250 firmware 0.20.17 incorrectly parses user-controlled JSON. The flaw enables JSON injection that leads to SQL injection in the video-core database. CVSS v3.0 is 8.8 with network attack vector, low complexity, low privileges, and no user interaction.

Likely exposure

Exposure is tied to Samsung SmartThings Hub STH-ETH-250 devices running firmware 0.20.17. The source bundle does not identify other models or firmware versions as affected.

Exploitation context

The CVE describes exploitation through a series of HTTP requests by an attacker with low privileges. The bundle does not show CISA KEV listing or other evidence of active exploitation.

Researcher notes

The available evidence supports a JSON-to-SQL injection chain in video-core’s credentials handler. Affected scope is limited in the bundle to STH-ETH-250 firmware 0.20.17. Patch availability and real-world exploitation are not established here.

Mitigation direction

  • Identify any Samsung SmartThings Hub STH-ETH-250 devices and firmware versions.
  • Check Samsung SmartThings and Talos guidance for firmware updates or vendor mitigations.
  • Restrict hub management and HTTP access to trusted networks only.
  • Remove internet exposure and isolate affected hubs from sensitive systems.
  • Replace or retire affected devices if no supported remediation is available.

Validation and detection

  • Confirm device model is Samsung SmartThings Hub STH-ETH-250.
  • Confirm whether firmware version 0.20.17 is present.
  • Review network paths that can reach the hub’s HTTP server.
  • Verify only trusted users and networks can access hub services.
  • Document firmware status, controls, and remediation ownership.
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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

description · low confidence lookup

Database behavior lookup

The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2018-3879 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
High
CVSS
8.8 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/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
8.8CVSS 3.0HighCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

8.8High
CVSS 3.0 vector shape for CVE-2018-3879Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/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.