Vulnerability Monitor

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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 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.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.5, requiring local system access to exploit with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts integrity (unauthorized modifications), for affected systems. Impacting 1 product from proftpd organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2017, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2017-04-04T17:59:00.337

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 5.5 (MEDIUM)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:N/I:P/A:N

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

3.9

Impact Score

2.9

Weaknesses

Type: Primary
CWE-59

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	proftpd	proftpd	≤ 1.3.5	Yes
Application	proftpd	proftpd	1.3.6	Yes
Application	proftpd	proftpd	1.3.6	Yes
Application	proftpd	proftpd	1.3.6	Yes
Application	proftpd	proftpd	1.3.6	Yes
Application	proftpd	proftpd	1.3.6	Yes

References

http://bugs.proftpd.org/show_bug.cgi?id=4295 Issue Tracking, Patch ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00004.html ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00022.html ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00009.html ([email protected])
http://www.securityfocus.com/bid/97409 Third Party Advisory, VDB Entry ([email protected])
https://github.com/proftpd/proftpd/commit/ecff21e0d0e84f35c299ef91d7fda088e516d4ed Issue Tracking, Patch, Third Party Advisory ([email protected])
https://github.com/proftpd/proftpd/commit/f59593e6ff730b832dbe8754916cb5c821db579f Issue Tracking, Patch, Third Party Advisory ([email protected])
https://github.com/proftpd/proftpd/pull/444/commits/349addc3be4fcdad9bd4ec01ad1ccd916c898ed8 Issue Tracking, Patch, Third Party Advisory ([email protected])
http://bugs.proftpd.org/show_bug.cgi?id=4295 Issue Tracking, Patch (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00004.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00022.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00009.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/97409 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/proftpd/proftpd/commit/ecff21e0d0e84f35c299ef91d7fda088e516d4ed Issue Tracking, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/proftpd/proftpd/commit/f59593e6ff730b832dbe8754916cb5c821db579f Issue Tracking, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/proftpd/proftpd/pull/444/commits/349addc3be4fcdad9bd4ec01ad1ccd916c898ed8 Issue Tracking, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For proftpd's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.