CVE-2020-26299
File System Bounds Escape
- State
- Published
- Severity
- 6.3 Medium
- Published
- Feb 10, 2021
- Updated
- Aug 4, 2024
- Reserved
- Oct 1, 2020
Description
ftp-srv is an open-source FTP server designed to be simple yet configurable. In ftp-srv before version 4.4.0 there is a path-traversal vulnerability. Clients of FTP servers utilizing ftp-srv hosted on Windows machines can escape the FTP user's defined root folder using the expected FTP commands, for example, CWD and UPDR. When windows separators exist within the path (`\`), `path.resolve` leaves the upper pointers intact and allows the user to move beyond the root folder defined for that user. We did not take that into account when creating the path resolve function. The issue is patched in version 4.4.0 (commit 457b859450a37cba10ff3c431eb4aa67771122e3).
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.3 Medium | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N | GitHub_M |
Weaknesses
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Products
| Product | Versions |
|---|---|
ftp-srvautovance |
|
References
- https://www.npmjs.com/package/ftp-srv
- https://github.com/autovance/ftp-srv/security/advisories/GHSA-pmw4-jgxx-pcq9
- https://github.com/autovance/ftp-srv/issues/167
- https://github.com/autovance/ftp-srv/issues/225
- https://github.com/autovance/ftp-srv/pull/224
- https://github.com/autovance/ftp-srv/commit/457b859450a37cba10ff3c431eb4aa67771122e3
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.