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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(10608);
- script_bugtraq_id(2356);
- script_version ("$Revision: 1.13 $");
-
- name["english"] = "OpenSSH 2.3.1 authentication bypass vulnerability";
- script_name(english:name["english"]);
-
- desc["english"] = "
- You are running OpenSSH 2.3.1.
-
- This version is vulnerable to a flaw which
- allows any attacker who can obtain the public key
- of a valid SSH user to log into this host without
- any authentication.
-
- Solution :
- Downgrade to OpenSSH 2.3.0 or upgrade to OpenSSH 2.3.2
-
- Risk factor : High";
-
-
-
- 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) 2001 Renaud Deraison",
- francais:"Ce script est Copyright (C) 2001 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)
- {
- if("2.3.1" >< banner)security_hole(port);
- }
-