Package Instance

StringIO buffer overread vulnerability
An issue was discovered in StringIO 3.0.1, as distributed in Ruby 3.0.x through 3.0.6 and 3.1.x through 3.1.4.

The `ungetbyte` and `ungetc` methods on a StringIO can read past the end of a string, and a subsequent call to `StringIO.gets` may return the memory value.

This vulnerability is not affected StringIO 3.0.3 and later, and Ruby 3.2.x and later.

We recommend to update the StringIO gem to version 3.0.3 or later. In order to ensure compatibility with bundled version in older Ruby series, you may update as follows instead:

* For Ruby 3.0 users: Update to `stringio` 3.0.1.1
* For Ruby 3.1 users: Update to `stringio` 3.1.0.2

You can use `gem update stringio` to update it. If you are using bundler, please add `gem "stringio", ">= 3.0.1.2"` to your `Gemfile`.

Ruby Time component ReDoS issue
A ReDoS issue was discovered in the Time component through 0.2.1 in Ruby through 3.2.1. The Time parser mishandles invalid URLs that have specific characters. It causes an increase in execution time for parsing strings to Time objects. The fixed versions are 0.1.1 and 0.2.2.

URI gem has ReDoS vulnerability
A ReDoS issue was discovered in the URI component before 0.12.2 for Ruby. The URI parser mishandles invalid URLs that have specific characters. There is an increase in execution time for parsing strings to URI objects with `rfc2396_parser.rb` and `rfc3986_parser.rb`.

NOTE: this issue exists becuse of an incomplete fix for CVE-2023-28755. Version 0.10.3 is also a fixed version.

[The Ruby advisory recommends](https://www.ruby-lang.org/en/news/2023/06/29/redos-in-uri-CVE-2023-36617/) updating the uri gem to 0.12.2. In order to ensure compatibility with the bundled version in older Ruby series, you may update as follows instead:
- For Ruby 3.0: Update to uri 0.10.3
- For Ruby 3.1 and 3.2: Update to uri 0.12.2.

You can use gem update uri to update it. If you are using bundler, please add gem `uri`, `>= 0.12.2` (or other version mentioned above) to your Gemfile.

REXML contains a denial of service vulnerability
### Impact

The REXML gem before 3.2.6 has a DoS vulnerability when it parses an XML that has many `>`s in an attribute value.

If you need to parse untrusted XMLs, you may be impacted to this vulnerability.

### Patches

The REXML gem 3.2.7 or later include the patch to fix this vulnerability.

### Workarounds

Don't parse untrusted XMLs.

### References

* https://www.ruby-lang.org/en/news/2024/05/16/dos-rexml-cve-2024-35176/