CVE intelligence and bounded remediation

CVE-2017-6510 — Efssoft Easy File Sharing Ftp Server security vulnerability

High CVSS 7.5

Easy File Sharing FTP Server version 3.6 is vulnerable to a directory traversal vulnerability which allows an attacker to list and download any file from any folder outside the FTP root Directory.

Severity
High
CVSS
7.5 (3.0)
Published
2017-03-16
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-22

Affected products

  • efssoft / easy_file_sharing_ftp_server

Matched remediation archetype

Path traversal, unsafe upload, and file handling

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Check exposure

  • Trace untrusted filenames, archive entries, URLs, and path segments into read, write, include, extraction, and upload operations.
  • Identify filesystem roots, mount permissions, symbolic-link behavior, archive handling, and whether uploaded content is web-accessible or executable.
  • Review canonicalization and containment checks across supported operating systems and storage backends.

Remediate safely

  • Generate server-side storage identifiers and resolve paths beneath a fixed root using filesystem-aware containment checks.
  • Reject absolute, parent-relative, alternate-separator, device, link, and archive entries that escape the intended root.
  • Store uploads outside executable or served paths, validate type and size, and use private atomic temporary files.

Authoritative sources

Complete CVE record and remediation plan

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