vulnerability
ProFTP ProFTPd: CVE-2017-7418: Improper Link Resolution Before File Access
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 2 | (AV:L/AC:L/Au:N/C:N/I:P/A:N) | Apr 4, 2017 | Nov 6, 2025 | Nov 6, 2025 |
Severity
2
CVSS
(AV:L/AC:L/Au:N/C:N/I:P/A:N)
Published
Apr 4, 2017
Added
Nov 6, 2025
Modified
Nov 6, 2025
Description
ProFTPD before 1.3.5e and 1.3.6 before 1.3.6rc5 controls whether the home directory of a user could contain a symbolic link through the AllowChrootSymlinks configuration option, but checks only the last path component when enforcing AllowChrootSymlinks. Attackers with local access could bypass the AllowChrootSymlinks control by replacing a path component (other than the last one) with a symbolic link. The threat model includes an attacker who is not granted full filesystem access by a hosting provider, but can reconfigure the home directory of an FTP user.
Solution
proftp-proftpd-upgrade-latest
References
- CVE-2017-7418
- https://attackerkb.com/topics/CVE-2017-7418
- URL-http://bugs.proftpd.org/show_bug.cgi?id=4295
- URL-http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00004.html
- URL-http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00022.html
- URL-http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00009.html
- URL-http://www.securityfocus.com/bid/97409
- URL-https://github.com/proftpd/proftpd/commit/ecff21e0d0e84f35c299ef91d7fda088e516d4ed
- URL-https://github.com/proftpd/proftpd/commit/f59593e6ff730b832dbe8754916cb5c821db579f
- URL-https://github.com/proftpd/proftpd/pull/444/commits/349addc3be4fcdad9bd4ec01ad1ccd916c898ed8
- CWE-59
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