Security readout for executives and security teams
Plain-English summary
This flaw affects Samsung SmartThings Hub STH-ETH-250 firmware 0.20.17. A privileged local attacker could cause memory corruption in a video-related process, potentially affecting confidentiality, integrity, and availability. The source bundle does not show active exploitation or a named fixed firmware.
Executive priority
Prioritize identification and vendor-guidance review. The impact is high, but exploitation requires local access and high privileges according to the CVSS vector, reducing broad internet-scale urgency.
Technical view
The video-core process insecurely reads fields from its SQLite shard table and copies a secretKey value into a 128-byte stack buffer using strcpy. An oversized value can trigger a stack buffer overflow. CVSS 3.0 rates it 7.5 with local access, high complexity, and high privileges required.
Likely exposure
Exposure appears limited to Samsung SmartThings Hub STH-ETH-250 devices running firmware 0.20.17. The CVSS vector indicates a local, high-privilege attack path, so risk is higher where untrusted users or compromised processes can influence device-local data.
Exploitation context
The bundle states an attacker can provide an overly long secretKey value, but it does not include KEV listing, public active-exploitation evidence, or reliable weaponization status. Treat this as serious but not proven exploited from the provided evidence.
Researcher notes
Key uncertainty is remediation detail: the provided bundle names the vulnerable firmware but not a fixed release. Research should stay focused on confirmed STH-ETH-250 firmware 0.20.17 behavior, local privilege requirements, and vendor-published update guidance.
Mitigation direction
- Inventory SmartThings Hub STH-ETH-250 devices and record firmware versions.
- Check Samsung SmartThings guidance for affected and fixed firmware details.
- Update firmware only according to vendor-supported instructions.
- Restrict administrative and local access to affected hubs.
- Segment affected hubs away from sensitive systems where feasible.
- Retire or replace unsupported affected devices if no vendor fix exists.
Validation and detection
- Confirm whether any STH-ETH-250 hub runs firmware 0.20.17.
- Review Samsung and Talos advisories for corrected firmware guidance.
- Verify only trusted administrators can access device management paths.
- Check network segmentation around affected SmartThings hubs.
- Document compensating controls if devices cannot be updated.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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.
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 lookupCVE-2018-3912 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
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.
CVSS vector scores
1 official scoreWe 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.
CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H0.86Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.5HighVector: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0581CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.