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Vulnerability record · CVE-2017-7418 · published 4 April 2017

CVE-2017-7418: Proftpd link following vulnerability

PProftpd · Proftpd

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.

5.5 CVSS 3.0 Medium EPSS 0.42% · top 66.2% CWE-59 · Link following
5.5CVSS 3.0 base score, v2 2.1
0.42%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
16References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://bugs.proftpd.org/show_bug.cgi?id=4295 Issue TrackingPatch
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 AdvisoryVDB Entry
https://github.com/proftpd/proftpd/commit/ecff21e0d0e84f35c299ef91d7fda088e516d4ed Issue TrackingPatchThird Party Advisory
https://github.com/proftpd/proftpd/commit/f59593e6ff730b832dbe8754916cb5c821db579f Issue TrackingPatchThird Party Advisory
https://github.com/proftpd/proftpd/pull/444/commits/349addc3be4fcdad9bd4ec01ad1ccd916c898ed8 Issue TrackingPatchThird Party Advisory
http://bugs.proftpd.org/show_bug.cgi?id=4295 Issue TrackingPatch
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 AdvisoryVDB Entry
https://github.com/proftpd/proftpd/commit/ecff21e0d0e84f35c299ef91d7fda088e516d4ed Issue TrackingPatchThird Party Advisory
https://github.com/proftpd/proftpd/commit/f59593e6ff730b832dbe8754916cb5c821db579f Issue TrackingPatchThird Party Advisory
https://github.com/proftpd/proftpd/pull/444/commits/349addc3be4fcdad9bd4ec01ad1ccd916c898ed8 Issue TrackingPatchThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2015-3306ProFTPD mod_copy arbitrary file read and writeThe mod_copy module in ProFTPD 1.3.5 fails to restrict the SITE CPFR and SITE CPTO commands, letting remote attackers copy arbitrary files on the ser…EPSS 97%analysed10.0CVE-2010-4221ProFTPD TELNET IAC handling stack buffer overflow allows remote code executionProFTPD before 1.3.3c contains multiple stack-based buffer overflows in the pr_netio_telnet_gets function in netio.c. A remote attacker can trigger t…EPSS 91%analysed9.8CVE-2019-12815ProFTPD mod_copy arbitrary file copy enables unauthenticated RCEmod_copy in ProFTPD up to 1.3.5b performs an arbitrary file copy without validating the source or destination, letting an unauthenticated remote clie…EPSS 58%analysed9.3CVE-2010-20103Proftpd vulnerabilityA malicious backdoor was embedded in the official ProFTPD 1.3.3c source tarball distributed between November 28 and December 2, 2010. The backdoor im…EPSS 5.1%9.0CVE-2011-4130Proftpd vulnerabilityUse-after-free vulnerability in the Response API in ProFTPD before 1.3.3g allows remote authenticated users to execute arbitrary code via vectors inv…EPSS 13%8.8CVE-2020-9273Proftpd use after free vulnerabilityIn ProFTPD 1.3.7, it is possible to corrupt the memory pool by interrupting the data transfer channel. This triggers a use-after-free in alloc_pool i…EPSS 12%8.7CVE-2026-63090Proftpd heap-based buffer overflow vulnerabilityProFTPD before 1.3.9c and 1.3.10rc3 contains a heap-based buffer overflow vulnerability in the mod_sftp module that allows authenticated low-privileg…EPSS 0.93%8.6CVE-2026-35025Proftpd link following vulnerabilityProFTPD through 1.3.9b and 1.3.10rc2 contains an access control bypass vulnerability that allows authenticated FTP users to circumvent Directory ACL …EPSS 0.51%

Source: NIST National Vulnerability Database (record CVE-2017-7418), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.