CVE-2020-26299
CVSS v3
9.6
CRITICAL
EPSS Score
1.0 %
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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).
Technical details
- Published
- 2021-02-10
Frequently asked questions
What is 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).
Is CVE-2020-26299 actively exploited?
Active exploitation of CVE-2020-26299 has not been confirmed. The EPSS score is 1.0%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2020-26299?
CVE-2020-26299 has a CVSS v3 base score of 9.6 (CRITICAL severity).
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