Ruby: CVE-2024-27280: Buffer overread vulnerability in StringIO

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A new Ruby blog post/announcement has been posted!

We have released the StringIO gem version 3.0.1.1 and 3.0.1.2 that have a security fix for a buffer overread vulnerability. This vulnerability has been assigned the CVE identifier CVE-2024-27280.

Details

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.

Recommended action

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 ...

Get the full details here: CVE-2024-27280: Buffer overread vulnerability in StringIO