Vulnerability 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`.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Tzinfo Project | Tzinfo | < 0.3.61 |
| Debian | Debian Linux | 10.0 |
Related Weaknesses (CWE)
References
- https://github.com/tzinfo/tzinfo/commit/9905ca93abf7bf3e387bd592406e403cd18334c7PatchThird Party Advisory
- https://github.com/tzinfo/tzinfo/commit/9eddbb5c0e682736f61d0dd803b6031a5db9eadfPatchThird Party Advisory
- https://github.com/tzinfo/tzinfo/releases/tag/v0.3.61Release NotesThird Party Advisory
- https://github.com/tzinfo/tzinfo/releases/tag/v1.2.10Release NotesThird Party Advisory
- https://github.com/tzinfo/tzinfo/security/advisories/GHSA-5cm2-9h8c-rvfxExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/08/msg00009.htmlMailing ListThird Party Advisory
- https://github.com/tzinfo/tzinfo/commit/9905ca93abf7bf3e387bd592406e403cd18334c7PatchThird Party Advisory
- https://github.com/tzinfo/tzinfo/commit/9eddbb5c0e682736f61d0dd803b6031a5db9eadfPatchThird Party Advisory
- https://github.com/tzinfo/tzinfo/releases/tag/v0.3.61Release NotesThird Party Advisory
- https://github.com/tzinfo/tzinfo/releases/tag/v1.2.10Release NotesThird Party Advisory
- https://github.com/tzinfo/tzinfo/security/advisories/GHSA-5cm2-9h8c-rvfxExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/08/msg00009.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2024/09/msg00008.html
FAQ
What is CVE-2022-31163?
CVE-2022-31163 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 Ru...
How severe is CVE-2022-31163?
CVE-2022-31163 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-31163?
Check the references section above for vendor advisories and patch information. Affected products include: Tzinfo Project Tzinfo, Debian Debian Linux.