ME020567: MailEnable webmail cross-site scripting vulnerability (CWE-79)
References: CVE-2012-0389
Discovered by: Sajjad Pourali, Narendra Shinde and Shahab NamaziKhah
Vendor advisory: http://www.mailenable.com/kb/Content/Article.asp?ID=me020567
Vendor contact: 2012-01-04 09:49:36 UTC
Vendor response: 2012-01-04 10:27:13 UTC (Peter Fregon from MailEnable)
Vendor fix and announcement: 2012-01-10 00:50:31 UTC

Vulnerability description:

MailEnable <http://www.mailenable.com/> Professional and Enterprise versions are prone to cross-site scripting vulnerabilities as the user-supplied input received via "Username" parameter of "ForgottonPassword.aspx" page is not properly sanitized. A specially crafted URL which a user clicks could gain access to the users cookies for webmail or execute other malicious code in users browser in context of the domain in use.

Remote: yes
Authentication required: no
User interaction required: yes

Affected:

- MailEnable Professional, Enterprise & Premium 4.26 and earlier
- MailEnable Professional, Enterprise & Premium 5.52 and earlier
- MailEnable Professional, Enterprise & Premium 6.02 and earlier

Not affected:

- MailEnable Standard is not affected.

PoC:

http://example.com/mewebmail/Mondo/lang/sys/ForgottenPassword.aspx?Username='};alert(/XSS/);{'

Resolution:

Users of MailEnable 5 and 6 can resolve the issue by upgrading to version 5.53 or 6.03 or later. Alternatively, and for version 4 users, the following fix can be applied:

1) Open the ForgottenPassword.aspx file in Notepad. This file is in the Mail Enable\bin\NETWebMail\Mondo\lang\[language] folders in version 4 and in Mail Enable\bin\NETWebMail\Mondo\lang\sys in version 5 and 6.
2) Locate and remove the following line, then save the file: document.getElementById("txtUsername").value = '<%= Request.Item("Username") %>';

- Henri Salo

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