Analyst readout for executives and security teams
Plain-English summary
CVE-2017-16295 is a high-severity memory corruption flaw in Insteon Hub firmware 1012. A validly authenticated attacker could send crafted PubNub commands that overflow a small stack buffer, potentially compromising the hub’s confidentiality, integrity, and availability.
Executive priority
Treat as high priority if Insteon Hub firmware 1012 exists in the environment. It is not KEV-listed in the provided data, but successful exploitation could fully affect device security and connected operational workflows.
Technical view
The flaw is a stack-based buffer overflow in the PubNub message handler for the cc channel. In cmd s_schd, the off key is copied with strcpy into a 16-byte stack buffer, allowing oversized input to overwrite adjacent stack data after an authenticated HTTP request.
Likely exposure
Exposure appears limited to Insteon Hub devices running firmware version 1012 and using the affected PubNub command path. The source bundle does not prove other firmware versions are affected.
Exploitation context
The CVSS vector indicates network reachability, low privileges, no user interaction, high complexity, and scope change. The bundle does not cite CISA KEV listing or confirmed active exploitation.
Researcher notes
Talos attributes the issue to unsafe strcpy handling of the off key in cmd s_schd. Evidence is specific to firmware 1012; patch status, broader version impact, and real-world exploitation are not established in the bundle.
Mitigation direction
- Inventory Insteon Hub devices and record firmware versions.
- Check Insteon or vendor guidance for firmware updates or replacement advice.
- Restrict hub access to trusted networks and accounts.
- Review and rotate credentials used for hub or cloud access.
- Monitor for unusual authenticated PubNub or hub command activity.
Validation and detection
- Confirm whether any deployed Insteon Hub runs firmware 1012.
- Verify whether PubNub-connected hub functionality is enabled or required.
- Review logs for unusual authenticated requests to hub control paths.
- Check vendor advisories for patched firmware or support status.
- Test only in an authorized lab; avoid production overflow probing.
Public sources used
Based on public source material and reviewed before publication.
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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Open ATT&CK lookupCVE-2017-16295 mapping review
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Open ATT&CK lookup- 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
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:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H1.86Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.5HighVector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://talosintelligence.com/vulnerability_reports/TALOS-2017-0483CVE reference
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.
Stack-based Buffer Overflow
Stack-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.