home *** CD-ROM | disk | FTP | other *** search
- #
- # (C) Tenable Network Security
- #
-
- if(description)
- {
- script_id(13856);
- script_bugtraq_id(10833);
- script_version("$Revision: 1.3 $");
-
- name["english"] = "Citadel/UX Username overflow";
-
- script_name(english:name["english"]);
-
- desc["english"] = "
- The remote host is running Citadel/UX, a BBS software for Unix systems.
-
- There is a buffer overflow in the remote version of this software
- which may be exploited by an attacker to execute arbitrary commands
- on the remote host.
-
- To exploit this flaw, an attacker would need to provide a specially
- crafted argument to the USER command.
-
- Solution : Upgrade to Citadel 6.24 or newer
- Risk factor : High";
-
- script_description(english:desc["english"]);
-
- summary["english"] = "Checks the version of the remote Citadel server";
-
- script_summary(english:summary["english"]);
-
- script_category(ACT_GATHER_INFO);
-
- script_copyright(english:"This script is Copyright (C) 2004 Tenable Network Security");
- family["english"] = "Gain a shell remotely";
- script_family(english:family["english"]);
-
- script_dependencies("find_service2.nasl");
- script_require_ports("Services/citadel/ux", 504);
- exit(0);
- }
-
-
- port = get_kb_item("Services/citadel/ux");
- if ( ! port ) port = 504;
-
- if ( ! get_port_state(port) ) exit(0);
- soc = open_sock_tcp(port);
- if ( ! soc ) exit(0);
-
- greetings = recv_line(socket:soc, length:4096);
- if ( ! ( greetings =~ "^200.*Citadel(/UX)?.*" ) ) exit(0);
-
- send(socket:soc, data:'INFO\r\n');
- for ( i = 0 ; i < 15 ; i ++ )
- {
- r = recv_line(socket:soc, length:4096);
- if ( ! r ) break;
- if ( r =~ "^000" ) break;
- data += r;
- }
-
- version = egrep(pattern:"^Citadel(/UX)? ([0-5]\.*|6\.([0-1][0-9]|2[0-3])[^0-9])",
- string:data);
-
- if ( version )
- security_hole(port);
-
-