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HIGH

CVE-2022-31163

CVSS v3

8.1

HIGH

EPSS Score

2.4 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • tzinfoRubyGemsfrom 1.0.0 · fixed in 1.2.10

Vendor advisories

  • CVE-2022-31163 Red Hat Product Security9 products fixed · 4 known affected

    rubygem-tzinfo: arbitrary code execution

    rubygem-tzinfo as a component of Red Hat OpenShift Container Platform 3.11 · rubygem-tzinfo-doc as a component of Red Hat OpenShift Container Platform 3.11 · rubygem-tzinfo.src as a component of Red Hat OpenShift Container Platform 3.11

  • RHSA-2023:2097 Red Hat Product Security2 products fixed

    Red Hat Security Advisory: Satellite 6.13 Release

  • RHSA-2023:1486 Red Hat Product Security3 products fixed

    Red Hat Security Advisory: Red Hat Gluster Storage web-admin-build security update

  • RHSA-2022:7242 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Satellite 6.11.4 Async Security Update

Full record on NVD

Description

TZInfo is a Ruby library that provides access to time zone data and allows times to be converted using time zone rules. Versions prior to 0.36.1, as well as those prior to 1.2.10 when used with the Ruby data source tzinfo-data, are vulnerable to relative path traversal. With the Ruby data source, time zones are defined in Ruby files. There is one file per time zone. Time zone files are loaded with `require` on demand. In the affected versions, `TZInfo::Timezone.get` fails to validate time zone identifiers correctly, allowing a new line character within the identifier. With Ruby version 1.9.3 and later, `TZInfo::Timezone.get` can be made to load unintended files with `require`, executing them within the Ruby process. Versions 0.3.61 and 1.2.10 include fixes to correctly validate time zone identifiers. Versions 2.0.0 and later are not vulnerable. Version 0.3.61 can still load arbitrary files from the Ruby load path if their name follows the rules for a valid time zone identifier and the file has a prefix of `tzinfo/definition` within a directory in the load path. Applications should ensure that untrusted files are not placed in a directory on the load path. As a workaround, the time zone identifier can be validated before passing to `TZInfo::Timezone.get` by ensuring it matches the regular expression `\\A[A-Za-z0-9+\\-_]+(?:\\/[A-Za-z0-9+\\-_]+)*\\z`.

Technical details

Published
2022-07-22

Frequently asked questions

What is CVE-2022-31163?

TZInfo is a Ruby library that provides access to time zone data and allows times to be converted using time zone rules. Versions prior to 0.36.1, as well as those prior to 1.2.10 when used with the Ruby data source tzinfo-data, are vulnerable to relative path traversal. With the Ruby data source, time zones are defined in Ruby files. There is one file per time zone. Time zone files are loaded with `require` on demand. In the affected versions, `TZInfo::Timezone.get` fails to validate time zone identifiers correctly, allowing a new line character within the identifier. With Ruby version 1.9.3 and later, `TZInfo::Timezone.get` can be made to load unintended files with `require`, executing them within the Ruby process. Versions 0.3.61 and 1.2.10 include fixes to correctly validate time zone identifiers. Versions 2.0.0 and later are not vulnerable. Version 0.3.61 can still load arbitrary files from the Ruby load path if their name follows the rules for a valid time zone identifier and the file has a prefix of `tzinfo/definition` within a directory in the load path. Applications should ensure that untrusted files are not placed in a directory on the load path. As a workaround, the time zone identifier can be validated before passing to `TZInfo::Timezone.get` by ensuring it matches the regular expression `\\A[A-Za-z0-9+\\-_]+(?:\\/[A-Za-z0-9+\\-_]+)*\\z`.

Is CVE-2022-31163 actively exploited?

Active exploitation of CVE-2022-31163 has not been confirmed. Its EPSS score was 2.4% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-31163?

CVE-2022-31163 has a CVSS v3 base score of 8.1 (HIGH severity).

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