CVE-2018-6914 Path traversal in n/a

What is CVE-2018-6914?

CVE-2018-6914 is a high-severity path traversal vulnerability in Canonical Ubuntu Linux, published on 3 Apr 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-22

Which versions are affected by CVE-2018-6914?

It affects 4 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Redhat Enterprise Linux, Ruby-Lang Ruby.

How do I fix CVE-2018-6914?

Upgrade to a fixed version.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2018-6914 being exploited?

There is no known exploitation of CVE-2018-6914 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2018-6914, CLEANSTART-2026-BJ91988, GHSA-wpg3-wgm5-rv8w, UBUNTU-CVE-2018-6914.