Security readout for executives and security teams
Plain-English summary
Hunesion i-oneNet has an upload flaw that can let an unauthenticated attacker place a webshell on the server and run commands. For an affected deployment, this can mean full compromise of confidentiality, integrity, and availability.
Executive priority
Treat this as high priority for any affected i-oneNet deployment. The issue can lead to server-level compromise without authentication. Prioritize inventory, exposure reduction, vendor guidance review, and compromise assessment.
Technical view
CVE-2019-12803 is CWE-434 unrestricted upload in a specific i-oneNet web upload module. Affected versions are 3.0.7 through 3.0.53 and 4.0.4 through 4.0.16. The module does not verify file extension or type, enabling webshell upload and remote code execution.
Likely exposure
Exposure is limited to organizations running the named Hunesion i-oneNet versions, especially where the vulnerable upload module is reachable from adjacent or internal networks. The provided data includes no CPEs or deployment prevalence.
Exploitation context
The source description says an attacker can upload a webshell and run system commands. The CVE is not marked KEV, and the provided sources do not show confirmed active exploitation in the wild.
Researcher notes
Evidence is clear on the vulnerable behavior and affected version ranges, but incomplete on fixed versions, CPEs, and exploitation activity. CVSS 3.0 vector is AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, indicating adjacent attack surface and high impact.
Mitigation direction
- Identify all Hunesion i-oneNet instances and versions.
- Check Hunesion or KRCERT guidance for vendor-supported fixes.
- Restrict network access to the upload module until remediated.
- Review web server files for unauthorized uploads.
- Monitor logs for unexpected upload activity and command execution indicators.
Validation and detection
- Confirm whether deployed versions fall in the affected ranges.
- Verify whether the vulnerable upload module is reachable.
- Review upload directories for unexpected executable files.
- Check server and application logs for suspicious upload events.
- Document patch or mitigation status for each instance.
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.
CWE-434: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2019-12803 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
- 8.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/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:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.8HighVector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.boho.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=35073CVE reference · x_refsource_CONFIRM
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.
Unrestricted Upload of File with Dangerous Type
Unrestricted Upload of File with Dangerous Type represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.