CVE-2017-7418 Detail

Current 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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  5.5 MEDIUM
Vector:  CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://bugs.proftpd.org/show_bug.cgi?id=4295 Issue Tracking  Patch 
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
http://www.securityfocus.com/bid/97409 Third Party Advisory  VDB Entry 
https://github.com/proftpd/proftpd/commit/ecff21e0d0e84f35c299ef91d7fda088e516d4ed Issue Tracking  Patch  Third Party Advisory 
https://github.com/proftpd/proftpd/commit/f59593e6ff730b832dbe8754916cb5c821db579f Issue Tracking  Patch  Third Party Advisory 
https://github.com/proftpd/proftpd/pull/444/commits/349addc3be4fcdad9bd4ec01ad1ccd916c898ed8 Issue Tracking  Patch  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-59 Improper Link Resolution Before File Access ('Link Following') cwe source acceptance level NIST  

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Change History

5 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-7418
NVD Published Date:
04/04/2017
NVD Last Modified:
08/08/2019
Source:
MITRE