CVE-2022-28738

Se ha encontrado una doble liberación en el compilador de Regexp en Ruby versiones 3.x anteriores a 3.0.4 y versiones 3.1.x anteriores a 3.1.2. Si una víctima intenta crear un Regexp a partir de una entrada de usuario no confiable, un atacante puede ser capaz de escribir en ubicaciones de memoria no esperadas

A double-free vulnerability was found in Ruby. The issue occurs during Regexp compilation. This flaw allows an attacker to create a Regexp object with a crafted source string that could cause the same memory to be freed twice.

It was discovered that Ruby incorrectly handled certain regular expressions. An attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 22.04 LTS. It was discovered that Ruby incorrectly handled certain inputs. An attacker could possibly use this issue to expose sensitive information.