CVE-2017-7418
First published: Tue Apr 04 2017(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| ProFTPD | <=1.3.5 | |
| ProFTPD | =1.3.6 | |
| ProFTPD | =1.3.6-rc1 | |
| ProFTPD | =1.3.6-rc2 | |
| ProFTPD | =1.3.6-rc3 | |
| ProFTPD | =1.3.6-rc4 |
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Reference Links
- http://bugs.proftpd.org/show_bug.cgi?id=4295
- 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
- https://github.com/proftpd/proftpd/commit/ecff21e0d0e84f35c299ef91d7fda088e516d4ed
- https://github.com/proftpd/proftpd/commit/f59593e6ff730b832dbe8754916cb5c821db579f
- https://github.com/proftpd/proftpd/pull/444/commits/349addc3be4fcdad9bd4ec01ad1ccd916c898ed8
Frequently Asked Questions
What is the severity of CVE-2017-7418?
CVE-2017-7418 has a medium severity rating as it allows local attackers to bypass security measures.
How do I fix CVE-2017-7418?
To fix CVE-2017-7418, upgrade to ProFTPD 1.3.5e or 1.3.6rc5 or later versions.
Who is affected by CVE-2017-7418?
CVE-2017-7418 affects users of ProFTPD versions prior to 1.3.5e and those using 1.3.6 before 1.3.6rc5.
What types of attacks are possible with CVE-2017-7418?
Attackers with local access can create symbolic links in user home directories allowing unauthorized access.
Can remote attackers exploit CVE-2017-7418?
No, CVE-2017-7418 requires local access to exploit the vulnerability.
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- agent/references
- agent/severity
- agent/weakness
- agent/type
- agent/description
- agent/event
- agent/last-modified-date
- agent/softwarecombine
- agent/remedy
- agent/first-publish-date
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/proftpd
- canonical/proftpd
- version/proftpd/1.3.5
- version/proftpd/1.3.6
- version/proftpd/1.3.6-rc1
- version/proftpd/1.3.6-rc2
- version/proftpd/1.3.6-rc3
- version/proftpd/1.3.6-rc4