CVE-2018-6914

Name: CVE-2018-6914
Creator: NVD / NIST
Published: 2018-04-03T22:29:00.587+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 10.55%

Last modified Jun 17, 2026

CVE-2018-6914 is a vulnerability of currently unknown severity. Directory traversal vulnerability in the Dir.mktmpdir method in the tmpdir library in Ruby before 2.2.10, 2.3.x before 2.3.7, 2.4.x before 2.4.4, 2.5.x before 2.5.1, and 2.6.0-preview1 might allow attackers to create arbitrary directories or files via a .. (dot dot) in the prefix argument.. EPSS estimates a 10.55% chance of exploitation in the next 30 days.

Description

Directory traversal vulnerability in the Dir.mktmpdir method in the tmpdir library in Ruby before 2.2.10, 2.3.x before 2.3.7, 2.4.x before 2.4.4, 2.5.x before 2.5.1, and 2.6.0-preview1 might allow attackers to create arbitrary directories or files via a .. (dot dot) in the prefix argument.

Metrics

EPSS Probability

10.55%

95.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions	Update
Ruby-Lang	Ruby	>= 2.2.0, < 2.2.10	—
Ruby-Lang	Ruby	>= 2.3.0, < 2.3.7	—
Ruby-Lang	Ruby	>= 2.4.0, < 2.4.4	—
Ruby-Lang	Ruby	>= 2.5.0, < 2.5.1	—
Ruby-Lang	Ruby	2.6.0	Preview1
Canonical	Ubuntu Linux	14.04	—
Canonical	Ubuntu Linux	16.04	—
Canonical	Ubuntu Linux	17.10	—
Debian	Debian Linux	7.0	—
Debian	Debian Linux	8.0	—
Debian	Debian Linux	9.0	—
Redhat	Enterprise Linux	6.0	—
Redhat	Enterprise Linux	7.0	—
Redhat	Enterprise Linux	7.4	—
Redhat	Enterprise Linux	7.5	—
Redhat	Enterprise Linux	7.6	—

References

http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
http://www.securityfocus.com/bid/103686Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1042004Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2018:3729Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3730Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3731Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2028
https://lists.debian.org/debian-lts-announce/2018/04/msg00023.htmlThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/04/msg00024.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/07/msg00012.htmlMailing List, Third Party Advisory
https://usn.ubuntu.com/3626-1/Third Party Advisory
https://www.debian.org/security/2018/dsa-4259Third Party Advisory
https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-2-10-released/Patch, Release Notes
https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-3-7-released/Patch, Release Notes
https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-4-4-released/Patch, Release Notes
https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-5-1-released/Patch, Release Notes
https://www.ruby-lang.org/en/news/2018/03/28/unintentional-file-and-directory-creation-with-directory-traversal-cve-2018-6914/Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
http://www.securityfocus.com/bid/103686Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1042004Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2018:3729Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3730Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3731Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2028
https://lists.debian.org/debian-lts-announce/2018/04/msg00023.htmlThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/04/msg00024.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/07/msg00012.htmlMailing List, Third Party Advisory
https://usn.ubuntu.com/3626-1/Third Party Advisory
https://www.debian.org/security/2018/dsa-4259Third Party Advisory
https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-2-10-released/Patch, Release Notes
https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-3-7-released/Patch, Release Notes
https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-4-4-released/Patch, Release Notes
https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-5-1-released/Patch, Release Notes
https://www.ruby-lang.org/en/news/2018/03/28/unintentional-file-and-directory-creation-with-directory-traversal-cve-2018-6914/Vendor Advisory

Timeline

Published: Apr 3, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-6914?

How severe is CVE-2018-6914?

Severity scoring for CVE-2018-6914 is pending analysis. The EPSS model estimates a 10.55% probability of exploitation in the next 30 days.

How do I fix CVE-2018-6914?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-6914?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST