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).
Version: 6.2.2 and probably the older versions
Vendor: Qbik (www.wingate.com)
Risk: service disruption
Discovered by: João 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.
The vulnerability can be triggered by sending the following messages
to the imap server: A01 LOGIN <user> <password> 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.