CVE-2012-4466

Ruby v1.8.7 antes de patchlevel 371, v1.9.3 antes patchlevel 286 y v2.0 antes de la revisión r37068 permite a atacantes dependientes de contexto evitar las restricciones de seguridad de nivel y modificar cadenas untainted a través de la función de la API name_err_mesg_to_str, que marca la cadena como contaminada, una diferente vulnerabilidad a CVE-2011-1005.

Tyler Hicks and Shugo Maeda discovered that Ruby incorrectly allowed untainted strings to be modified in protective safe levels. An attacker could use this flaw to bypass intended access restrictions. USN-1602-1 fixed these vulnerabilities in other Ubuntu releases. This update provides the corresponding updates for Ubuntu 12.10. Peter Bex discovered that Ruby incorrectly handled file path strings when opening files. An attacker could use this flaw to open or create unexpected files. Various other issues were also addressed.