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- #
- # This script was written by Renaud Deraison <deraison@cvs.nessus.org>
- #
- # Script audit and contributions from Carmichael Security <http://www.carmichaelsecurity.com>
- # Erik Anderson <eanders@carmichaelsecurity.com>
- # Added BugtraqID
- #
- # See the Nessus Scripts License for details
- #
-
- if(description)
- {
- script_id(10965);
- script_bugtraq_id(4810);
- script_version ("$Revision: 1.9 $");
-
- name["english"] = "SSH 3 AllowedAuthentication";
- name["francais"] = "SSH 3 AllowedAuthentication";
- script_name(english:name["english"], francais:name["francais"]);
-
- desc["english"] = "
- You are running a version of SSH which is older than 3.1.2
- and newer or equal to 3.0.0.
-
- There is a vulnerability in this release that may, under
- some circumstances, allow users to authenticate using a
- password whereas it is not explicitly listed as a valid
- authentication mechanism.
-
-
- An attacker may use this flaw to attempt to brute force
- a password using a dictionary attack (if the passwords
- used are weak).
-
- Solution :
- Upgrade to version 3.1.2 of SSH which solves this problem.
-
- Risk factor : Low";
-
-
-
-
- script_description(english:desc["english"]);
-
- summary["english"] = "Checks for the remote SSH version";
- summary["francais"] = "VΘrifie la version de SSH";
- script_summary(english:summary["english"], francais:summary["francais"]);
-
- script_category(ACT_GATHER_INFO);
-
-
- script_copyright(english:"This script is Copyright (C) 2002 Renaud Deraison",
- francais:"Ce script est Copyright (C) 2002 Renaud Deraison");
- family["english"] = "Gain a shell remotely";
- family["francais"] = "Obtenir un shell α distance";
- script_family(english:family["english"], francais:family["francais"]);
- script_dependencie("ssh_detect.nasl");
- script_require_ports("Services/ssh", 22);
- exit(0);
- }
-
- #
- # The script code starts here
- #
- include("backport.inc");
-
- port = get_kb_item("Services/ssh");
- if(!port)port = 22;
-
- banner = get_kb_item("SSH/banner/" + port);
- if ( ! banner ) exit(0);
- banner = tolower(get_backport_banner(banner:banner));
-
-
- if("openssh" >< banner)exit(0);
- if("f-secure" >< banner)exit(0);
- if("mpSSH" >< banner)exit(0);
-
- if(ereg(pattern:"[-_](3\.(0\.[0-9]+)|(1\.[01])[^0-9]*)$", string:banner))
- security_warning(port);
-