[SIG^2 G-TEC] CMailServer WebMail v5.2 Multiple Vulnerabilities
SIG^2 Vulnerability Research Advisory
CMailServer WebMail v5.2 Multiple Vulnerabilities
by Tan Chew Keong
Release Date: 24 Nov 2004
ADVISORY URL
http://www.security.org.sg/vuln/cmailserver52.html
SUMMARY
CMailServer (http://www.youngzsoft.net/cmailserver/) is a small and easy-to-use
Mail Server software and Web Mail software. It enables you to send and receive
emails across the Internet or within the LAN and has support for client email
applications such as Outlook, Eudora etc. CMailServer supports Hotmail-like Web
Mail service based on ASP scripts.
Multiple vulnerabilies were found in CMailServer's Web Mail service including
buffer overflow, SQL Injection and Cross-Site Scripting (XSS).
TESTED SYSTEM
CMailServer Version 5.2 on English Win2K IIS 5.0.
DETAILS
CMailServer is a small and easy-to-use Mail Server software and Web Mail
software. It enables you to send and receive emails across the Internet or
within the LAN and has support for client email applications such as Outlook,
Eudora etc. CMailServer supports Hotmail-like Web Mail service based on ASP
scripts. Multiple vulnerabilies were found in CMailServer's Web Mail service
including buffer overflow, SQL Injection and Cross-Site Scripting (XSS).
1. Buffer overflow in CMailCOM.dll's attachment download method may allow
arbitrary code execution.
2. SQL Injection in fdelmail.asp allows deleting of other users' mail metadata.
3. SQL Injection in addressc.asp allows deleting of other users' email address
contacts.
4. XSS vulnerability in admin.asp when displaying users' personal info.
PATCH
Upgrade to the latest version of CMailServer v5.2.1.
DISCLOSURE TIMELINE
12 Nov 04 - Vulnerability Discovered.
13 Nov 04 - Initial Vendor Notification by Email and Web Form.
16 Nov 04 - Initial Vendor Reply.
21 Nov 04 - Vendor provided patched version for testing.
21 Nov 04 - Notified Vendor that a patch did not work.
21 Nov 04 - Vendor provided updated version for testing.
24 Nov 04 - Public Release
GREETINGS
All guys at SIG^2 G-TEC Lab
http://www.security.org.sg/webdocs/g-tec.html
"IT Security...the Gathering. By enthusiasts for enthusiasts."