Simple PHP Blog <= 0.5.1 Local File Include vulnerability
Local file inclusion in Simple PHP Blog via the blog_language1 parameter.
Antecedentes
Simple PHP Blog is a blogging system that does not require setting up a database and is very easy to install.
Description
Simple PHP Blog up to version 0.5.1 is vulnerable to local file inclusion in languages_cgi.php, because the blog_language1 parameter is not properly sanitized.
Business impact
An attacker can read arbitrary files in the web server context and execute arbitrary local PHP scripts.
Affected systems
Versions up to and including 0.5.1. To fix the application, the file_exists() and basename() functions must be added to the affected code.
Solución
Modify line 62 of languages_cgi.php to filter the $_POST['blog_language1'] variable with a regular expression that only allows alphanumeric characters and underscores.
Calendario de divulgación
References
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