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Vendor: Jscape, http://www.jscape.com/
Affected Products: Jscape Secure FTP Applet
Vulnerability: SSH Host key is not verified allowing for Man in the
Secure FTP Applet is a secure FTP client component that runs within your web
browser. Secure FTP Applet [..] while encrypting all data exchanged between
the client and server using either the SFTP (FTP over SSH) or FTPS (FTP over
SSL) protocols [..] ensuring that all data exchanged is completely secure.
During the connection the Applet does not verify or display the host key. As such n.runs was able to perform a man in the middle attack during a penetration test at a client.
Read more about SSH Host verification:
http://www.securityfocus.com/infocus/1806 Impact ^^^^^^
The supposedly secure connection is no longer secure. n.runs was able to extract login, password and data with a simple SSH Man in the Middle attack. Solution: ^^^^^^^^^
Upgrade to version 4.9.0 or above
2006/04/12 n.runs sends a Vulnerability notice informing Jscape about the
nature of the problem and the impact.
2006/04/13 Jscape acknowledges and ask for more details
2006/04/13 n.runs sends more details
2007/07/26 n.runs asks for feedback and if the problem has been patched
2007/07/26 Jscape replies "We do not have a release date yet for this
2007/07/26 n.runs asks whether they can offer a estimate when the patch
will be available
2007/07/26 Jscape answers again "We do not have a release date yet for this
2008/02/19 n.runs requests a statement to be used in the advisory as there seems to be no intention to patch and argues "you deem this problem as low yet it renders the *secure connection* insecure."
2008/02/20 Jscape promises to "continue to look into this issue and notify
you when a patch is available. 2008/02/25 n.runs notifies Jscape that an advisory will be released by the
end of the week if they do not patch the flaw n.runs reported
roughly 2 years ago.
"Given the long time this has already been reported
and the criticality of this issue, I would expect a patch to
ready by the end of the week. If the patch is not available
the end of this week (29.02.2008) I'll proceed with the
2008/02/29 Jscape notifies n.runs that the flaw has been patched 2008/06/01 n.runs verifies the patch and confirms that Man in the Middle is not longer possible if the user does not accept the new key. n.runs however recommends that Jscape warns the users of the security implications of a new SSH Host key rather then simply displaying "New Host key".
Advisories can be found at : http://www.nruns.com/security_advisory.php
Unnaltered electronic reproduction of this advisory is permitted. For all other reproduction or publication, in printing or otherwise, contact firstname.lastname@example.org for permission. Use of the advisory constitutes acceptance for use in an "as is" condition. All warranties are excluded. In no event shall n.runs be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if n.runs has been advised of the possibility of such damages.
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