MS KB2219475: Windows Help Center hcp:// Protocol Handler Arbitrary Code Execution - Nessus

High Plugin ID: 47045

This page contains detailed information about the MS KB2219475: Windows Help Center hcp:// Protocol Handler Arbitrary Code Execution 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: 47045
Name: MS KB2219475: Windows Help Center hcp:// Protocol Handler Arbitrary Code Execution
Filename: smb_kb_2219475.nasl
Vulnerability Published: 2010-06-09
This Plugin Published: 2010-06-18
Last Modification Time: 2020-08-05
Plugin Version: 1.29
Plugin Type: local
Plugin Family: Windows
Dependencies: smb_hotfixes.nasl, smb_nt_ms10-042.nasl
Required KB Items [?]: SMB/Missing/MS10-042, SMB/Registry/Enumerated, SMB/WindowsVersion

Vulnerability Information

Severity: High
Vulnerability Published: 2010-06-09
Patch Published: N/A
CVE [?]: CVE-2010-1885, CVE-2010-2265
CPE [?]: cpe:/o:microsoft:windows
Exploited by Malware: True

Synopsis

It may be possible to execute arbitrary code on the remote host using Windows Help and Support Center.

Description

If a remote attacker can trick a user on the affected host into accessing a malicious web page containing specially crafted 'hcp://' URLs, an as-yet unpatched vulnerability in Windows Help and Support Center that arises due to its failure to validate URLs that use the HCP protocol could be leveraged to execute arbitrary code on the host subject to the user's privileges.

Solution

Either apply MS10-042 or consider unregistering the HCP protocol as a workaround.

Note, though, that applying the workaround will break local, legitimate help links that use 'hcp://'.

Public Exploits

Target Network Port(s): 139, 445
Target Asset(s): N/A
Exploit Available: True (Metasploit Framework, Exploit-DB, Immunity Canvas, Core Impact)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the MS KB2219475: Windows Help Center hcp:// Protocol Handler Arbitrary Code Execution vulnerability:

Metasploit: exploit/windows/browser/ms10_042_helpctr_xss_cmd_exec
[Microsoft Help Center XSS and Command Execution]
Exploit-DB: exploits/windows/remote/16545.rb
[EDB-16545: Microsoft Help Center - Cross-Site Scripting / Command Execution (MS10-042) (Metasploit)]
Immunity Canvas: CANVAS

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:M/Au:N/C:C/I:C/A:C/E:H/RL:OF/RC:C

CVSS Base Score:	9.3 (High)
Impact Subscore:	10.0
Exploitability Subscore:	8.6
CVSS Temporal Score:	8.1 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	8.1 (High)

STIG Severity [?]: II
STIG Risk Rating: Medium

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Plugin Source

#
# (C) Tenable Network Security, Inc.
#


include("compat.inc");


if (description)
{
  script_id(47045);
  script_version("1.29");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/08/05");

  script_cve_id("CVE-2010-1885", "CVE-2010-2265");
  script_bugtraq_id(40721, 40725);
  script_xref(name:"CERT", value:"578319");
  script_xref(name:"IAVA", value:"2010-A-0095-S");
  script_xref(name:"MSFT", value:"MS10-042");
  script_xref(name:"MSKB", value:"2219475");

  script_name(english:"MS KB2219475: Windows Help Center hcp:// Protocol Handler Arbitrary Code Execution");
  script_summary(english:"Checks whether the hcp protocol has been unregistered");

  script_set_attribute(attribute:"synopsis", value:
"It may be possible to execute arbitrary code on the remote host using
Windows Help and Support Center.");
  script_set_attribute(attribute:"description", value:
"If a remote attacker can trick a user on the affected host into
accessing a malicious web page containing specially crafted 'hcp://'
URLs, an as-yet unpatched vulnerability in Windows Help and Support
Center that arises due to its failure to validate URLs that use the
HCP protocol could be leveraged to execute arbitrary code on the host
subject to the user's privileges.");
  script_set_attribute(attribute:"see_also", value:"https://seclists.org/fulldisclosure/2010/Jun/205");
  # https://docs.microsoft.com/en-us/security-updates/SecurityAdvisories/2010/2219475
  script_set_attribute(attribute:"see_also", value:"https://www.nessus.org/u?1bd7b338");
  # https://docs.microsoft.com/en-us/security-updates/SecurityBulletins/2010/ms10-042
  script_set_attribute(attribute:"see_also", value:"https://www.nessus.org/u?da3bd311");
  script_set_attribute(attribute:"solution", value:
"Either apply MS10-042 or consider unregistering the HCP protocol as a
workaround.

Note, though, that applying the workaround will break local,
legitimate help links that use 'hcp://'.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/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:"exploit_framework_core", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Microsoft Help Center XSS and Command Execution');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
  script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
  script_set_attribute(attribute:"canvas_package", value:'CANVAS');

  script_set_attribute(attribute:"vuln_publication_date", value:"2010/06/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2010/06/18");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:microsoft:windows");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Windows");

  script_copyright(english:"This script is Copyright (C) 2010-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("smb_hotfixes.nasl", "smb_nt_ms10-042.nasl");
  script_require_keys("SMB/Registry/Enumerated", "SMB/WindowsVersion", "SMB/Missing/MS10-042");
  script_require_ports(139, 445);

  exit(0);
}


include("smb_func.inc");
include("smb_hotfixes.inc");
include("smb_hotfixes_fcheck.inc");
include("audit.inc");


if (!get_kb_item('SMB/WindowsVersion')) exit(1, "The 'SMB/WindowsVersion' KB item is missing.");
if (hotfix_check_sp(xp:4, win2003:3) <= 0) exit(0, "The host is not affected based on its version / service pack.");
if (!get_kb_item("SMB/Missing/MS10-042")) exit(0, "The host is not affected because the 'SMB/Missing/MS10-042' KB item is missing.");


# Connect to the appropriate share.
login   =  kb_smb_login();
pass    =  kb_smb_password();
domain  =  kb_smb_domain();
port    =  kb_smb_transport();

if(! smb_session_init()) audit(AUDIT_FN_FAIL, 'smb_session_init');

rc = NetUseAdd(login:login, password:pass, domain:domain, share:"IPC$");
if (rc != 1)
{
  NetUseDel();
  exit(1, "Can't connect to IPC$ share.");
}

hkcr = RegConnectRegistry(hkey:HKEY_CLASS_ROOT);
if (isnull(hkcr))
{
  NetUseDel();
  exit(1, "Can't connect to remote registry.");
}


hcp_installed = FALSE;
hcp_label = "";
hcp_handler = "";

key = "HCP";
key_h = RegOpenKey(handle:hkcr, key:key, mode:MAXIMUM_ALLOWED);
if (!isnull(key_h))
{
  # nb: per <http://msdn.microsoft.com/en-us/library/aa767914%28VS.85%29.aspx>,
  #     the "URL Protocol" string must be present.
  value = RegQueryValue(handle:key_h, item:"URL Protocol");
  if (!isnull(value))
  {
    hcp_installed = TRUE;

    value = RegQueryValue(handle:key_h, item:NULL);
    if (!isnull(value)) hcp_label = value[1];

    key2 = key + "\shell\open\command";
    key2_h = RegOpenKey(handle:hkcr, key:key2, mode:MAXIMUM_ALLOWED);
    if (!isnull(key2_h))
    {
      value = RegQueryValue(handle:key2_h, item:NULL);
      if (!isnull(value)) hcp_handler = value[1];

      RegCloseKey(handle:key2_h);
    }
  }

  RegCloseKey(handle:key_h);
}
RegCloseKey(handle:hkcr);
NetUseDel();


if (hcp_installed)
{
  if (hcp_handler)
  {
    if (report_verbosity > 0)
    {
      if (!hcp_label) hcp_label = 'n/a';

      report = '\n  Label   : ' + hcp_label +
               '\n  Handler : ' + hcp_handler + '\n';
      security_hole(port:port, extra:report);
    }
    else security_hole(port);
    exit(0);
  }
  else exit(0, "The HCP protocol handler has been unregistered.");
}
else exit(0, "The HCP protocol handler has been deleted.");

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

Linux / Unix:
/opt/nessus/lib/nessus/plugins/smb_kb_2219475.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\smb_kb_2219475.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/smb_kb_2219475.nasl

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How to Run

Here is how to run the MS KB2219475: Windows Help Center hcp:// Protocol Handler Arbitrary Code Execution 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 Windows plugin family.
On the right side table select MS KB2219475: Windows Help Center hcp:// Protocol Handler Arbitrary Code Execution plugin ID 47045.
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 smb_kb_2219475.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a smb_kb_2219475.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - smb_kb_2219475.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 smb_kb_2219475.nasl -t <IP/HOST>

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References

BID | SecurityFocus Bugtraq ID:

40721, 40725

MSKB | Microsoft Knowledge Base:

2219475

MSFT | Microsoft Security Bulletin:

MS10-042

IAVA | Information Assurance Vulnerability Alert:

2010-A-0095-S

CERT | Computer Emergency Response Team:

578319

See also:

Similar and related Nessus plugins:

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Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file smb_kb_2219475.nasl version 1.29. For more plugins, visit the Nessus Plugin Library.

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MS KB2219475: Windows Help Center hcp:// Protocol Handler Arbitrary Code Execution - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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