Path Traversal in Autovance Ftp-Srv
CVE-2020-26299
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).
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.019 (78.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 78.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000
Affected products
- Autovance Ftp-Srv — versions < 4.4.0
- Ftp-Srv Project
Weakness classification (CWE)
References
- www.npmjs.com/package/ftp-srv (Product, Third Party Advisory)
- github.com/autovance/ftp-srv/security/advisories/GHSA-pmw4-jgxx-pcq9 (Exploit, Third Party Advisory)
- github.com/autovance/ftp-srv/issues/167 (Exploit, Patch, Third Party Advisory)
- github.com/autovance/ftp-srv/issues/225 (Exploit, Third Party Advisory)
- github.com/autovance/ftp-srv/pull/224 (Patch, Third Party Advisory)
- github.com/autovance/ftp-srv/commit/457b859450a37cba10ff3c431eb4aa67771122e3 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-26299?
- CVE-2020-26299 is a medium-severity vulnerability in Autovance Ftp-Srv, classified under Path Traversal. CVSS score: 6.3/10. Published 2021-02-10.
- How severe is CVE-2020-26299?
- Medium severity. CVSS v3 base score is 6.3 out of 10.