Security readout for executives and security teams
Plain-English summary
Synology File Station versions before 1.1.1-0099 allowed a logged-in remote user to place files outside the intended extraction destination. That could let an attacker with valid access alter system or application files, depending on permissions. Public sources do not provide a CVSS score or evidence of active exploitation.
Executive priority
Treat as a targeted remediation item for Synology environments. Prioritize internet-accessible or multi-user File Station deployments, but do not escalate as emergency based solely on the provided sources because active exploitation is not evidenced.
Technical view
CVE-2017-15893 is a CWE-22 directory traversal flaw in SYNO.FileStation.Extract. The dest_folder_path parameter could allow remote authenticated users to write arbitrary files. The affected product is Synology File Station before version 1.1.1-0099. Source data does not describe exploit prerequisites beyond authentication or post-write impact.
Likely exposure
Exposure is likely limited to Synology deployments running File Station before 1.1.1-0099, especially where remote authenticated users can access File Station extraction functionality.
Exploitation context
The provided sources do not show CISA KEV listing or confirmed active exploitation. The issue requires authenticated remote access, reducing broad internet drive-by risk, but arbitrary file write can be serious when account access is compromised or overly broad.
Researcher notes
Evidence is concise: authenticated directory traversal through dest_folder_path in SYNO.FileStation.Extract enables arbitrary file write before 1.1.1-0099. No CVSS vector, exploit chain, privilege context, or active exploitation confirmation is provided in the source bundle.
Mitigation direction
- Upgrade Synology File Station to 1.1.1-0099 or later.
- Review Synology advisory SA-17:69 for vendor-specific remediation guidance.
- Restrict File Station access to trusted users while remediation is pending.
- Review account access and remove unnecessary File Station permissions.
Validation and detection
- Inventory Synology systems and confirm File Station versions.
- Identify any instance running File Station before 1.1.1-0099.
- Confirm remote File Station access is limited to authorized users.
- Review vendor advisory status against deployed Synology packages.
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-22: 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-2017-15893 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.synology.com/en-global/support/security/Synology_SA_17_69_File_StationCVE 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.