FTPS Cleartext Fallback Security Bypass

This script is Copyright (C) 2011-2016 Tenable Network Security, Inc.


Synopsis :

The FTPS server on the remote host falls back to cleartext
communication if SSL negotiations fail.

Description :

The remote FTPS server running on the remote host is affected by a
security bypass vulnerability due to accepting unencrypted commands if
SSL negotiations fail. A man-in-the-middle attacker can exploit this
to intercept credentials and modify files.

See also :

http://www.serv-u.com/releasenotes/

Solution :

If using Serv-U, upgrade to version 11.1.0.3 or later. Otherwise,
contact the vendor for a patch.

Risk factor :

Medium / CVSS Base Score : 5.8
(CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N)
CVSS Temporal Score : 4.8
(CVSS2#E:F/RL:OF/RC:C)
Public Exploit Available : true

Family: FTP

Nessus Plugin ID: 57272 ()

Bugtraq ID: 50881

CVE ID:

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