Microsoft IIS ISM.DLL HTR Request Remote Overflow - Nessus

Critical Plugin ID: 10116

This page contains detailed information about the Microsoft IIS ISM.DLL HTR Request Remote Overflow Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

Table Of Contents

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Plugin Overview
Vulnerability Information

Synopsis
Description
Solution

Public Exploits
Risk Information
Plugin Source
How to Run
References
Version

Plugin Overview

ID: 10116
Name: Microsoft IIS ISM.DLL HTR Request Remote Overflow
Filename: iis_buffer_overflow.nasl
Vulnerability Published: 1999-06-08
This Plugin Published: 1999-06-22
Last Modification Time: 2022-04-11
Plugin Version: 1.60
Plugin Type: remote
Plugin Family: Web Servers
Dependencies: find_service1.nasl, http_version.nasl, www_fingerprinting_hmap.nasl, www_too_long_url.nasl
Required KB Items [?]: Settings/ParanoidReport
Excluded KB Items: www/too_long_url_crash

Vulnerability Information

Severity: Critical
Vulnerability Published: 1999-06-08
Patch Published: N/A
CVE [?]: CVE-1999-0874
CPE [?]: cpe:/a:microsoft:iis

Synopsis

The remote web server is affected by a remote buffer overflow vulnerability.

Description

The remote IIS web server is affected by a remote buffer overflow vulnerability. A malformed request for an .HTR, .STM, or .IDC file could lead to a denial of service, or possibly remote arbitrary code execution.

Solution

Apply the patch from the bulletin referenced above.

Public Exploits

Target Network Port(s): 80
Target Asset(s): Services/www
Exploit Available: True (Metasploit Framework, Exploit-DB)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the Microsoft IIS ISM.DLL HTR Request Remote Overflow vulnerability:

Metasploit: exploit/windows/iis/ms02_018_htr
[MS02-018 Microsoft IIS 4.0 .HTR Path Overflow]
Exploit-DB: exploits/windows/remote/16468.rb
[EDB-16468: Microsoft IIS 4.0 - '.htr' Path Overflow (MS02-018) (Metasploit)]
Exploit-DB: exploits/windows/remote/19246.pm
[EDB-19246: Microsoft IIS 4.0 - Remote Buffer Overflow (2)]

Before running any exploit against any system, make sure you are authorized by the owner of the target system(s) to perform such activity. In any other case, this would be considered as an illegal activity.

WARNING: Beware of using unverified exploits from sources such as GitHub or Exploit-DB. These exploits and PoCs could contain malware. For more information, see how to use exploits safely.

Risk Information

CVSS V2 Vector [?]: AV:N/AC:L/Au:N/C:C/I:C/A:C/E:F/RL:OF/RC:C

CVSS Base Score:	10.0 (High)
Impact Subscore:	10.0
Exploitability Subscore:	10.0
CVSS Temporal Score:	8.3 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	8.3 (High)

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Plugin Source

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
#  Modified by HD Moore <[email protected]>
#        The original plugin actually took down the server,
#        this checks for the .htr ISAPI mapping but doesnt
#        actually try to overflow the server.

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

if (description)
{
  script_id(10116);
  script_version("1.60");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/04/11");

  script_cve_id("CVE-1999-0874");
  script_bugtraq_id(307);
  script_xref(name:"MSFT", value:"MS99-019");
  script_xref(name:"MSKB", value:"234905");

  script_name(english:"Microsoft IIS ISM.DLL HTR Request Remote Overflow");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server is affected by a remote buffer overflow
vulnerability.");
  script_set_attribute(attribute:"description", value:
"The remote IIS web server is affected by a remote buffer overflow
vulnerability. A malformed request for an .HTR, .STM, or .IDC file
could lead to a denial of service, or possibly remote arbitrary code
execution.");
  script_set_attribute(attribute:"see_also", value:"https://docs.microsoft.com/en-us/security-updates/SecurityBulletins/1999/ms99-019");
  script_set_attribute(attribute:"solution", value:
"Apply the patch from the bulletin referenced above.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  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_cwe_id(119);

  script_set_attribute(attribute:"vuln_publication_date", value:"1999/06/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"1999/06/22");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  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_MIXED_ATTACK);
  script_family(english:"Web Servers");

  script_copyright(english:"This script is Copyright (C) 1999-2022 Tenable Network Security, Inc. / Modifications by HD Moore <[email protected]>");

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

  exit(0);
}

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

if (report_paranoia < 2) audit(AUDIT_PARANOID);

port = get_http_port(default:80);

banner = get_http_banner(port:port);
if ( "IIS" >!< banner ) exit(0);

if (http_is_dead(port:port)) exit(0);

if( safe_checks() )
{
  r = http_mk_get_req(item:"/nessus.htr", port:port);
  data = http_mk_buffer_from_req(req: r);
  soc  = http_open_socket(port);
  if(soc)
  {
   send(socket:soc, data:data);
   b = recv_line(socket:soc, length:1024);
   http_close_socket(soc);
   if (strlen(b) == 0) security_hole(port);
  }
  exit(0);
 }


r = http_mk_get_req(item:string(crap(4096), ".html"), port:port);
data1 = http_mk_buffer_from_req(req: r);
r = http_mk_get_req(item:string(crap(4096), ".htr"), port:port);
data2 = http_mk_buffer_from_req(req: r);

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

send(socket:soc, data:data1);
b = recv_line(socket:soc, length:4096);
http_close_socket(soc);

if (strlen(b) == 0) exit(0);

soc = http_open_socket(port);
if (! soc) exit(0);
send(socket:soc, data:data2);
b = recv_line(socket:soc, length:4096);
http_close_socket(soc);
if (! strlen(b)) security_hole(port);

The latest version of this script can be found in these locations depending on your platform:

Linux / Unix:
/opt/nessus/lib/nessus/plugins/iis_buffer_overflow.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\iis_buffer_overflow.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/iis_buffer_overflow.nasl

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How to Run

Here is how to run the Microsoft IIS ISM.DLL HTR Request Remote Overflow as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

Click to start a New Scan.
Select Advanced Scan.
Navigate to the Plugins tab.
On the top right corner click to Disable All plugins.
On the left side table select Web Servers plugin family.
On the right side table select Microsoft IIS ISM.DLL HTR Request Remote Overflow plugin ID 10116.
Specify the target on the Settings tab and click to Save the scan.
Run the scan.

Here are a few examples of how to run the plugin in the command line. Note that the examples below demonstrate the usage on the Linux / Unix platform.

Basic usage:

/opt/nessus/bin/nasl iis_buffer_overflow.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a iis_buffer_overflow.nasl -t <IP/HOST>

Run the plugin with trace script execution written to the console (useful for debugging):

/opt/nessus/bin/nasl -T - iis_buffer_overflow.nasl -t <IP/HOST>

Run the plugin with using a state file for the target and updating it (useful for running multiple plugins on the target):

/opt/nessus/bin/nasl -K /tmp/state iis_buffer_overflow.nasl -t <IP/HOST>

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References

BID | SecurityFocus Bugtraq ID:

MSKB | Microsoft Knowledge Base:

234905

MSFT | Microsoft Security Bulletin:

MS99-019

CWE | Common Weakness Enumeration:

CWE-119 (Weakness) Improper Restriction of Operations within the Bounds of a Memory Buffer

See also:

Similar and related Nessus plugins:

108808 - Microsoft IIS 7.0 Vulnerabilities (uncredentialed) (PCI/DSS)
10492 - MS00-006: Microsoft IIS IDA/IDQ Multiple Vulnerabilities (uncredentialed check)
10671 - MS01-026 / MS01-044: Microsoft IIS Remote Command Execution (uncredentialed check)
10932 - Microsoft IIS .HTR ISAPI Filter Enabled
11028 - Microsoft IIS .HTR Filter Multiple Overflows (MS02-028)
31648 - Microsoft IIS webhits.dll Hit-Highlighting Authentication Bypass
10685 - Microsoft IIS ISAPI Filter Multiple Vulnerabilities (MS01-044)
10759 - Web Server HTTP Header Internal IP Disclosure
11412 - Microsoft IIS WebDAV ntdll.dll Remote Overflow (MS03-007)
51956 - MS11-004: Vulnerability in Internet Information Services (IIS) FTP Service Could Allow Remote Code Execution (2489256) (uncredentialed check)
59817 - Microsoft IIS 6.0 PHP NTFS Stream Authentication Bypass
64589 - Microsoft ASP.NET MS-DOS Device Name DoS (PCI-DSS check)
64588 - Microsoft ASP.NET MS-DOS Device Name DoS
153474 - Microsoft Open Management Infrastructure < 1.6.8.1 Multiple Vulnerabilities
11923 - Microsoft FrontPage Server Extensions (fp30reg.dll) Debug Function Remote Overflow (MS03-051 / 813360)
10497 - Microsoft FrontPage Extensions MS-DOS Device Request DoS
10405 - Microsoft IIS FrontPage Server Extensions (FPSE) shtml.exe Path Disclosure
99523 - Microsoft Windows Server 2003 IIS 6.0 WebDAV PROPFIND Request Handling RCE (EXPLODINGCAN)
99281 - Microsoft Windows Server 2003 R2 IIS 6.0 WebDAV PROPFIND Request Handling RCE (EXPLODINGCAN)
10357 - Microsoft IIS MDAC RDS (msadcs.dll) Arbitrary Remote Command Execution
11161 - Microsoft Data Access Components RDS Data Stub Remote Overflow
11664 - Microsoft Media Services ISAPI nsiislog.dll Multiple Overflows
153486 - Microsoft Open Management Infrastructure RCE (CVE-2021-38647)
38808 - Microsoft IIS WebDAV Unicode Request Directory Security Bypass
11370 - Microsoft IIS fpcount.exe CGI Remote Overflow
40825 - MS09-053: Microsoft IIS FTPd NLST Command Remote Buffer Overflow (975191) (uncredentialed check)
10657 - MS01-023: Microsoft IIS 5.0 Malformed HTTP Printer Request Header Remote Buffer Overflow (953155) (uncredentialed check)
10564 - Microsoft IIS Phone Book Service /pbserver/pbserver.dll Remote Overflow
34407 - MS08-062: Microsoft IIS IPP Service Unspecified Remote Overflow (953155)
39342 - MS09-020: Vulnerabilities in Internet Information Services (IIS) Could Allow Elevation of Privilege (970483)
49223 - MS10-065: Vulnerabilities in Microsoft Internet Information Services (IIS) Could Allow Remote Code Execution (2267960)
51904 - MS11-004: Vulnerability in Internet Information Services (IIS) FTP Service Could Allow Remote Code Execution (2489256)
62905 - MS12-073: Vulnerabilities in Microsoft Internet Information Services (IIS) Could Allow Information Disclosure (2733829)
79135 - MS14-076: Vulnerability in Internet Information Services (IIS) Could Allow Security Feature Bypass (2982998)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file iis_buffer_overflow.nasl version 1.60. For more plugins, visit the Nessus Plugin Library.

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Microsoft IIS ISM.DLL HTR Request Remote Overflow - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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