Microsoft IIS .HTR Filter Multiple Overflows (MS02-028)

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

# Script audit and contributions from Carmichael Security
#      Erik Anderson <[email protected]>
#      Added BugtraqID

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

if (description)
{
  script_id(11028);
  script_version("1.42");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/04/11");

  script_cve_id("CVE-2002-0071", "CVE-2002-0364");
  script_bugtraq_id(4855, 5003);
  script_xref(name:"MSFT", value:"MS02-028");
  script_xref(name:"MSKB", value:"321599");

  script_name(english:"Microsoft IIS .HTR Filter Multiple Overflows (MS02-028)");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server is affected by a buffer overflow vulnerability.");
  script_set_attribute(attribute:"description", value:
"The remote server is vulnerable to a buffer overflow in the .HTR
filter.

An attacker may use this flaw to execute arbitrary code on
this host (although the exploitation of this flaw is considered
 difficult).");
  script_set_attribute(attribute:"see_also", value:"https://docs.microsoft.com/en-us/security-updates/SecurityBulletins/2002/ms02-028");
  script_set_attribute(attribute:"solution", value:
"To unmap the .HTR extension:
 1.Open Internet Services Manager 
 2.Right-click the Web server choose Properties from the context menu 
 3.Master Properties 
 4.Select WWW Service -> Edit -> HomeDirectory -> Configuration 
 5.Remove the reference to .htr from the list

See Microsoft bulletin MS02-028 for a patch.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_set_attribute(attribute:"metasploit_name", value:'MS02-018 Microsoft IIS 4.0 .HTR Path Overflow');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2002/04/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2002/06/13");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:iis");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_end_attributes();

  script_category(ACT_DESTRUCTIVE_ATTACK);
  script_family(english:"Web Servers");

  script_copyright(english:"This script is Copyright (C) 2002-2022 Tenable Network Security, Inc.");

  script_dependencies("find_service1.nasl", "no404.nasl", "http_version.nasl", "www_fingerprinting_hmap.nasl");
  script_require_keys("Settings/ParanoidReport");
  script_require_ports("Services/www", 80);

  exit(0);
}

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

if (report_paranoia < 2)
  exit(1, "This plugin only runs if 'Report paranoia' is set to 'Paranoid'.");

port = get_http_port(default:80);

sig = get_http_banner(port: port);
if ("IIS" >!< sig )
  exit(0, 'The web server on port ' + port + ' doesn\'t look like IIS');

d = '20\r\n'
  + crap(32) + 'r\n'
  + '0\r\n\r\n';
r = http_mk_post_req(item:"/NULL.htr", 
  add_headers: make_array("Transfer-Encoding", "chunked"),
  port:port,
  data: d);

soc = http_open_socket(port);
if (! soc) exit(1, "port "+port+ " is closed or filtered");

req = http_mk_buffer_from_req(req: r);
send(socket:soc, data:req);
r = http_recv_headers3(socket:soc);
if (r =~ "^HTTP/1.[01] 100 Continue")
{
  r2 = http_recv_body(socket:soc, length:0, headers:r);
  if (! r2) security_hole(port);
}
http_close_socket(soc);