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Fencer Vulns
high 7.5

CVE-2022-31163 json

TZInfo relative path traversal vulnerability allows loading of arbitrary files

published 2022-07-21 4 y ago modified 2026-06-17 4 mo ago also GHSA-5cm2-9h8c-rvfx , EUVD-2022-6242

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.4%
EPSS 2.4% chance of exploitation in 30 days, percentile 84%
public exploits
0
none known

Summary

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`.

Patch / fix

  • rubygems tzinfo 0.3.61, 1.2.10
  • tzinfo_project tzinfo 0.3.61, 1.2.10
  • ruby-tzinfo Debian 14, Debian 13, Debian 12 2.0.4-2

debian advisories DEBIAN-CVE-2022-31163

  • cjson satellite capsule 6.13, satellite 6.13 1.7.14-5.el8sat
  • foreman satellite utils 6.13, satellite capsule 6.13, satellite 6.13 3.5.1.14-1.el8sat
  • katello satellite capsule 6.13, satellite 6.13 4.7.0-1.el8sat
  • libsolv satellite capsule 6.13, satellite 6.13 0.7.22-4.el8pc
  • libcomps satellite capsule 6.13, satellite 6.13 0.1.18-4.el8pc
  • qpid-cpp satellite capsule 6.13, satellite 6.13 1.39.0-7.el8amq
  • qpid-qmf satellite capsule 6.13, satellite 6.13 1.39.0-7.el8amq
  • candlepin satellite 6.13 4.2.13-1.el8sat

red hat advisories RHSA-2023:2097RHSA-2023:1486RHSA-2022:7242

  • rubygem-tzinfo OpenStack Cloud Crowbar 9, OpenStack Cloud Crowbar 8 1.2.2-3.3.1
  • rubygem-tzinfo SLE High Availability Extension 15 SP4, SLE High Availability Extension 15 SP3, SLE High Availability Extension 15 SP2 +4 more 1.2.4-150000.3.3.1

suse advisories SUSE-SU-2022:2765-1SUSE-SU-2022:2592-1

  • rubygem-tzinfo-1.2 openSUSE Tumbleweed 1.2.11-1.5
  • rubygem-tzinfo-1.2 openSUSE Tumbleweed 1.2.10-1.1
  • ruby3.2-rubygem-tzinfo-1.2 openSUSE Tumbleweed 1.2.10-1.4

opensuse advisories openSUSE-SU-2024:14178-1openSUSE-SU-2024:12249-1openSUSE-SU-2024:13171-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-31163 updated cvss 7.5

rubygem-tzinfo: arbitrary code execution

  • Red Hat OpenShift Container Platform 3.11 rubygem-tzinfo
    affected: workaround, no fix available “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.”
  • Red Hat OpenStack Platform 13 (Queens) Operational Tools rubygem-tzinfo
    affected: workaround, no fix planned “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.”
  • Red Hat Gluster 3.5 Web Administration on RHEL-7 rubygem-tzinfo 1.2.10-1.el7rhgs
    fixed: vendor fix “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.” RHSA-2023:1486
  • Red Hat Satellite 6.11 for RHEL 7 tfm-rubygem-tzinfo 1.2.10-1.el7sat Red Hat Satellite 6.11 for RHEL 8 rubygem-tzinfo 1.2.10-1.el8sat
    fixed: vendor fix “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.” RHSA-2022:7242
  • Red Hat Satellite 6.13 for RHEL 8 rubygem-tzinfo 2.0.5-1.el8sat
    fixed: vendor fix “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.” RHSA-2023:2097
  • Red Hat Gluster 3.5 Web Administration on RHEL-7 ruby 2.4.9-94.el7rhgs, grafana 5.2.4-6.el7rhgs, ruby-irb 2.4.9-94.el7rhgs, ruby-libs 2.4.9-94.el7rhgs, rubygem-i18n 1.9.1-1.el7rhgs, rubygem-rack 2.2.4-1.el7rhgs, +28 more Red Hat Satellite 6.11 for RHEL 7 foreman 3.1.1.25-1.el7sat, satellite 6.11.4-2.el7sat, foreman-cli 3.1.1.25-1.el7sat, foreman-ec2 3.1.1.25-1.el7sat, foreman-gce 3.1.1.25-1.el7sat, satellite-cli 6.11.4-2.el7sat, +19 more Red Hat Satellite 6.11 for RHEL 8 foreman 3.1.1.25-1.el8sat, satellite 6.11.4-2.el8sat, foreman-cli 3.1.1.25-1.el8sat, foreman-ec2 3.1.1.25-1.el8sat, foreman-gce 3.1.1.25-1.el8sat, rubygem-rack 2.2.3.1-1.el8sat, +19 more Red Hat Satellite 6.13 for RHEL 8 cjson 1.7.14-5.el8sat, katello 4.7.0-1.el8sat, libsolv 0.7.22-4.el8pc, libcomps 0.1.18-4.el8pc, python-idna 3.3-2.el8pc, python-pbr 5.8.0-4.el8pc, +670 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

2.45% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/tzinfo/tzinfo/security/advisories/GHSA-5cm2-9h8c-rvfx referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
rubygems tzinfo
<0.3.61
>=1.0.0, <1.2.10
0.3.61
1.2.10

Affected products

  • tzinfo tzinfo

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory
  • CWE-23 Relative Path Traversal

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.