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Fencer Intel
medium 5.5

CVE-2017-7418 json

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 All…

published 2017-04-04 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-16442

cvss
5.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits
0
none known

Summary

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.

Patch / fix

  • proftpd-dfsg Debian 14, Debian 13, Debian 12 1.3.5b-4

debian advisories DEBIAN-CVE-2017-7418

  • proftpd openSUSE Tumbleweed 1.3.6e-1.10
  • proftpd Package Hub 15 SP1, Package Hub 15, openSUSE Leap 15.1 1.3.6b-bp151.4.6.2
  • proftpd Package Hub 15 SP1 1.3.5e-bp151.4.3.1
  • proftpd Package Hub 15, openSUSE Leap 15.1, openSUSE Leap 15.0 1.3.5e-bp150.3.3.1

opensuse advisories openSUSE-SU-2024:11196-1openSUSE-SU-2020:0031-1openSUSE-SU-2019:1870-1openSUSE-SU-2019:1836-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-7418 updated cvss 7.1

proftpd: AllowChrootSymlinks control bypass

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 5.5 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-59 Improper Link Resolution Before File Access

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.