5.5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:S/C:P/I:P/A:N
9.6 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
0.003 Low
EPSS
Percentile
71.5%
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.
None at the moment.
There are no workarounds for windows servers. Hosting the server on a different OS mitigates the issue.
Issues:
https://github.com/autovance/ftp-srv/issues/167
https://github.com/autovance/ftp-srv/issues/225
If you have any questions or comments about this advisory:
Open an issue at https://github.com/autovance/ftp-srv.
Please email us directly; [email protected].
github.com/advisories/GHSA-pmw4-jgxx-pcq9
github.com/autovance/ftp-srv/commit/457b859450a37cba10ff3c431eb4aa67771122e3
github.com/autovance/ftp-srv/issues/167
github.com/autovance/ftp-srv/issues/225
github.com/autovance/ftp-srv/pull/224
github.com/autovance/ftp-srv/security/advisories/GHSA-pmw4-jgxx-pcq9
nvd.nist.gov/vuln/detail/CVE-2020-26299
www.npmjs.com/package/ftp-srv
5.5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:S/C:P/I:P/A:N
9.6 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
0.003 Low
EPSS
Percentile
71.5%