AOH :: HP Unsorted W :: BX4019.HTM

WinGate Email Server (IMAP) vulnerability
WinGate Email Server (IMAP) vulnerability
WinGate Email Server (IMAP) vulnerability

WinGate is vulnerable to denial-of-service (DoS) attacks caused  
probably by a resource exhaustion vulnerability.
The IMAP server ceases to provide access to its clients after  
processing a LIST command with a large parameter (see details bellow).

Product: WinGate
Version: 6.2.2 and probably the older versions
Vendor: Qbik ( 
Type: Denial-of-service
Risk: service disruption
Remote: Yes
Discovered by: Jo=E3o Antunes (AJECT -- Attack Injection Tool) on 14/May/ 
Exploit: Not Available
Solution: Not Available
Status: Developers were contacted several times since the  
vulnerability was discovered.

Vulnerability Description
The vulnerability can be triggered by sending the following messages  
to the imap server:
A02 LIST Ax1000 *

Depending on the server's resources, it may be required to repeat the  
above exploit to deplete its resources. (in a 512MB RAM configuration,  
the exploit was executed twice)
The above exploit caused the server to reject all subsequent  
connections with a "NO access denied" reply thus resulting in a remote  
denial of service.

The entire AOH site is optimized to look best in Firefox® 3 on a widescreen monitor (1440x900 or better).
Site design & layout copyright © 1986-2015 AOH
We do not send spam. If you have received spam bearing an email address, please forward it with full headers to