Permissions, Privileges, and Access Controls in ProFTPD - CVE-2017-7418

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Main Vulnerability Database Vulnerabilities #VU20007

Permissions, Privileges, and Access Controls in ProFTPD - CVE-2017-7418

Published: August 8, 2019 / Updated: September 7, 2020


Vulnerability identifier: #VU20007
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-7418
CWE-ID: CWE-264
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to access sensitive information.

The vulnerability exists due to incorrect implementation of the AllowChrootSymlinks option that checks only the last path component when enforcing it. A local user with ability to manage own FTP home directory can create a specially crafted symbolic link and gain unauthorized access to the filesystem.


Affected software

ProFTPD
QNAP QTS
Fedora
Slackware Linux
SUSE Linux
Opensuse
proftpd

How to mitigate CVE-2017-7418

Install updates from vendor's website.

ProFTPD - addressed in versions 1.3.5e, 1.3.6
QNAP QTS - addressed in versions 4.2.6 20200821, 4.3.3.1315 20200611, 4.3.6.1411 20200825, 4.4.3.1400 20200817
proftpd - addressed in versions 1.3.5e-1.el7, 1.3.5e-1.fc24, 1.3.5e-1.fc25, 1.3.5e-1.fc26, 1.3.5e-2.el7

External References

Related Security Bulletins