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FreeBSD : proftpd -- user chroot escape vulnerability (770d7e91-72af-11e7-998a-08606e47f965)

medium Nessus Plugin ID 102030

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Synopsis

The remote FreeBSD host is missing a security-related update.

Description

NVD reports :

ProFTPD ... 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.

Solution

Update the affected package.

See Also

http://bugs.proftpd.org/show_bug.cgi?id=4295

http://www.nessus.org/u?a83c03f4

Plugin Details

Severity: Medium

ID: 102030

File Name: freebsd_pkg_770d7e9172af11e7998a08606e47f965.nasl

Version: 3.5

Type: local

Published: 7/28/2017

Updated: 12/4/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:P/A:N

CVSS Score Source: CVE-2017-7418

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:proftpd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 7/27/2017

Vulnerability Publication Date: 3/6/2017

Reference Information

CVE: CVE-2017-7418