CVE-2020-26299 Information

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).

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Reference

https://github.com/autovance/ftp-srv/security/advisories/GHSA-pmw4-jgxx-pcq9 https://github.com/autovance/ftp-srv/commit/457b859450a37cba10ff3c431eb4aa67771122e3 https://www.npmjs.com/package/ftp-srv https://github.com/autovance/ftp-srv/issues/167 https://github.com/autovance/ftp-srv/issues/225 https://github.com/autovance/ftp-srv/pull/224

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

NONE

Base Severity

9.6