Secunia

Simo64 has discovered some vulnerabilities in Site@School, which can be exploited by malicious users to disclose certain sensitive information and by malicious people to compromise a vulnerable system.

1) Input passed to the "dir" parameter in starnet/editors/htmlarea/popups/images.php is not properly verified before being used. This can be exploited to list certain contents of arbitrary directories via directory traversal attacks.

2) Input passed to the "cmsdir" parameter in multiple files is not properly verified before being used to include files. This can be exploited to execute arbitrary PHP code by including files from local or external resources.

Example (confirmed in versions 2.4.03 and 2.4.02):
http://[host]/starnet/modules/include/include.php?cmsdir=[file]

Examples (confirmed in version 2.4.02):
http://[host]/starnet/modules/sn_allbum/slideshow.php?cmsdir=[file]
http://[host]/starnet/themes/editable/main.inc.php?cmsdir=[file]

NOTE: Reportedly, other files are also affected.

Successful exploitation requires that "register_globals" is enabled.

The vulnerabilities have been confirmed in versions 2.4.02 and 2.4.03. Other versions may also be affected.

Solution
Edit the source code to ensure that input is properly verified.

Provided and/or discovered by
Simo64

Changelog
Further details available in Customer Area

Original Advisory
http://milw0rm.com/exploits/2374

Deep Links
Links available in Customer Area