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.