Secunia

Tan Chew Keong has reported some vulnerabilities in Winmail Server, which can be exploited by malicious users to disclose sensitive information, use a vulnerable system for port scanning other hosts, conduct script insertion attacks, or compromise a vulnerable system.

1) Input passed to the "filename" parameter in "download.php" is not properly sanitised before being used to download files. This can be exploited by authenticated users to disclose arbitrary files via directory traversal attacks.

2) Input passed to the "filename" parameter in "upload.php" is not properly sanitised before being used to upload files. This can be exploited by authenticated users to upload files to arbitrary locations via directory traversal attacks (e.g. PHP scripts).

3) Input passed to personal info in "userinfo.php" is not properly sanitised before being used. This can be exploited to inject arbitrary HTML and script code, which will be executed in an administrator's browser session in context of an affected site when the malicious user data is viewed via "/admin/user.php".

4) Some input validation errors in the handling of IMAP commands, can be exploited by authenticated users to disclose arbitrary files and mails, and create or remove arbitrary directories via directory traversal attacks, using the "CREATE", "EXAMINE", "SELECT" and "DELETE" commands.

5) The PORT command can be requested for arbitrary IP addresses, which can be exploited to conduct port scanning of arbitrary hosts.

The vulnerabilities have been reported in version 4.0 (build 1112). Other versions may also be affected.

Solution
Update to version 4.0 (build 1318).
Further details available in Customer Area

Provided and/or discovered by
Tan Chew Keong

Changelog
Further details available in Customer Area

Original Advisory
http://www.security.org.sg/vuln/magicwinmail40.html

Deep Links
Links available in Customer Area