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`.
History

Thu, 05 Sep 2024 14:30:00 +0000

Type Values Removed Values Added
References

cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2022-07-21T13:30:16

Updated: 2024-09-05T14:09:42.030Z

Reserved: 2022-05-18T00:00:00

Link: CVE-2022-31163

cve-icon Vulnrichment

Updated: 2024-09-03T10:02:42.400Z

cve-icon NVD

Status : Modified

Published: 2022-07-22T04:15:14.273

Modified: 2024-11-21T07:04:02.060

Link: CVE-2022-31163

cve-icon Redhat

Severity : Important

Publid Date: 2022-07-22T00:00:00Z

Links: CVE-2022-31163 - Bugzilla