Vulnerabilities > CVE-2003-1054 - Denial of Service vulnerability in MOD Access Referer MOD Access Referer 1.0.2

#%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from the FreeBSD VuXML database :
#
# Copyright 2003-2018 Jacques Vidrine and contributors
#
# Redistribution and use in source (VuXML) and 'compiled' forms (SGML,
# HTML, PDF, PostScript, RTF and so forth) with or without modification,
# are permitted provided that the following conditions are met:
# 1. Redistributions of source code (VuXML) must retain the above
#    copyright notice, this list of conditions and the following
#    disclaimer as the first lines of this file unmodified.
# 2. Redistributions in compiled form (transformed to other DTDs,
#    published online in any format, converted to PDF, PostScript,
#    RTF and other formats) must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer
#    in the documentation and/or other materials provided with the
#    distribution.
# 
# THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
# OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS DOCUMENTATION,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

include("compat.inc");

if (description)
{
  script_id(19081);
  script_version("1.19");
  script_cvs_date("Date: 2019/08/02 13:32:36");

  script_cve_id("CVE-2003-1054");
  script_bugtraq_id(7375);
  script_xref(name:"Secunia", value:"8612");

  script_name(english:"FreeBSD : mod_access_referer -- NULL pointer dereference vulnerability (af747389-42ba-11d9-bd37-00065be4b5b6)");
  script_summary(english:"Checks for updated package in pkg_info output");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote FreeBSD host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"A malformed Referer header field causes the Apache
ap_parse_uri_components function to discard it with the result that a
pointer is not initialized. The mod_access_referer module does not
take this into account with the result that it may use such a pointer.

The NULL pointer vulnerability may possibly be used in a remote denial
of service attack against affected Apache servers."
  );
  # http://marc.theaimsgroup.com/?l=full-disclosure&m=105053485515811
  script_set_attribute(
    attribute:"see_also",
    value:"https://marc.info/?l=full-disclosure&m=105053485515811"
  );
  # https://vuxml.freebsd.org/freebsd/af747389-42ba-11d9-bd37-00065be4b5b6.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?0d722888"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:W/RC:ND");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:mod_access_referer");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");

  script_set_attribute(attribute:"vuln_publication_date", value:"2003/04/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2004/12/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2005/07/13");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2005-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"FreeBSD Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/FreeBSD/release", "Host/FreeBSD/pkg_info");

  exit(0);
}


include("audit.inc");
include("freebsd_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/FreeBSD/release")) audit(AUDIT_OS_NOT, "FreeBSD");
if (!get_kb_item("Host/FreeBSD/pkg_info")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (pkg_test(save_report:TRUE, pkg:"mod_access_referer<1.0.2_1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:pkg_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");

#
# This script was written by Xue Yong Zhi ([email protected])
# 

# Changes by Tenable:
# - Revised plugin title, changed family, formatted desc/solution (6/24/09)

# Ref:
# Date: Wed, 16 Apr 2003 23:14:33 +0200
# From: zillion <[email protected]>
# To: [email protected]
# Subject: [VulnWatch] Apache mod_access_referer denial of service issue


exit(0); # Temporarily disabled

include("compat.inc");

if(description)
{
 script_id(11543); 
 script_version("1.28");
 script_cve_id("CVE-2003-1054");
 script_bugtraq_id(7375);

 script_name(english:"mod_access_referer 1.0.2 for Apache Malformed Referer DoS");
 
 script_set_attribute(attribute:"synopsis", value:
"The remote web server is using a module that is affected by a 
denial of service vulnerability." );
 script_set_attribute(attribute:"description", value:
"The remote web server may be using a mod_access_referer apache module
which contains a NULL pointer dereference bug. Abuse of this 
vulnerability could allow an attacker to launch a denial of service 
attack against affected systems." );
 script_set_attribute(attribute:"see_also", value:"https://seclists.org/fulldisclosure/2003/Apr/235" );
 script_set_attribute(attribute:"solution", value:
"There is no known solution at this time." );
 script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
 script_set_cvss_temporal_vector("CVSS2#E:U/RL:W/RC:ND");
 script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
 script_set_attribute(attribute:"exploit_available", value:"false");

 script_set_attribute(attribute:"plugin_publication_date", value: "2003/04/18");
 script_set_attribute(attribute:"vuln_publication_date", value: "2003/04/16");
 script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/12");
script_set_attribute(attribute:"plugin_type", value:"remote");
script_end_attributes();

 
 script_summary(english:"Apache module mod_access_referer 1.0.2 contains a NULL pointer dereference vulnerability");
 script_category(ACT_DENIAL);
 script_copyright(english:"This script is Copyright (C) 2003-2020 Xue Yong Zhi");
 script_family(english:"Web Servers");
 script_dependencie("find_service1.nasl", "http_version.nasl");
 script_require_ports("Services/www", 80);
 script_exclude_keys("Settings/disable_cgi_scanning");
 script_require_keys("www/apache");
 exit(0);
}

include("http_func.inc");
include("http_keepalive.inc");

port = get_http_port(default:80, embedded:TRUE);

b = get_http_banner(port: port);
l = egrep(string: b, pattern: "^Server: Apache");
if (! l) exit(0);
if ("Apache/" >< l && ! ereg(string: l, pattern: "Apache/(1\.3|2\.0)"))
  exit(0);

function check(req)
{
  local_var idx, r, soc;
  #As you see, the Referer part is malformed.
  #And it depends on configuration too -- there must be an IP
  #addresses based access list for mod_access_referer.

  soc = http_open_socket(port);
  if(!soc)exit(0);

  req = http_get(item:req, port:port);
  idx = stridx(req, string("\r\n\r\n"));
  req = insstr(req, string("\r\nReferer: ://www.nessus.org\r\n\r\n"), idx);
  send(socket:soc, data:req);
  r = http_recv(socket:soc);
  http_close_socket(soc);
  if ( "HTTP">< r ) return(0);
  
  security_warning(port);
  exit(0);
}

# first to make sure it's a working webserver

req = http_get(item:"/", port:port);
idx = stridx(req, string("\r\n\r\n"));
req = insstr(req, string("\r\nReferer: http://www.nessus.org\r\n\r\n"), idx);
r = http_keepalive_send_recv(port:port, data:req);
if(r==NULL) exit(0);
if("HTTP">!<r) exit(0);

# We do not know which dir is under control of the
# mod_access_reeferer, just try some...

dirs = get_kb_item(string("www/", port, "/content/directories"));
if(isnull(dirs))dirs = make_list("/");

foreach dir (make_list(cgi_dirs(),"/", dirs))
{
 if(dir && check(req:dir)) exit(0);
}