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CRITICAL

ruby: Unintentional directory traversal by poisoned NULL byte in Dir

Published Apr 3, 2018

Description

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, the Dir.open, Dir.new, Dir.entries and Dir.empty? methods do not check NULL characters. When using the corresponding method, unintentional directory traversal may be performed.

Affected products

Remediation

Red Hat statement

This issue affects the versions of ruby as shipped with Red Hat CloudForms 4. Red Hat Product Security has rated this issue as having security impact of Moderate. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/. This issue affects the versions of ruby as shipped with Red Hat Subscription Asset Manager 1. Red Hat Product Security has rated this issue as having security impact of Moderate. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.

Red Hat mitigation

It is possible to test for presence of the NULL byte manually prior to call a Dir method with an untrusted string.

Metrics

Weaknesses (1)

CWE-22

Path Traversal

References (24)

Change history (0)

No recorded changes yet.

Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Apr 3, 2018
Updated Aug 5, 2024
Reserved Mar 19, 2018
Link CVE-2018-8780
CISA Vulnrichment
Updated n/a
NVD
Status Modified
Modified Jun 17, 2026
Link CVE-2018-8780
Red Hat
Severity Moderate
Public date Mar 28, 2018
Links CVE-2018-8780 - Bugzilla