Novell Client nwfs.sys Local Privilege Escalation - Nessus

High   Plugin ID: 33481

This page contains detailed information about the Novell Client nwfs.sys Local Privilege Escalation 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

ID: 33481
Name: Novell Client nwfs.sys Local Privilege Escalation
Filename: novell_nwfs_4_91_4_12.nasl
Vulnerability Published: N/A
This Plugin Published: 2008-07-11
Last Modification Time: 2018-07-16
Plugin Version: 1.15
Plugin Type: local
Plugin Family: Windows
Dependencies: smb_hotfixes.nasl
Required KB Items [?]: SMB/Registry/Enumerated

Vulnerability Information

Severity: High
Vulnerability Published: N/A
Patch Published: 2008-06-26
CVE [?]: CVE-2008-3158
CPE [?]: N/A

Synopsis

The remote Windows host contains a driver that is affected by a local privilege escalation vulnerability.

Description

The file 'NWFS.SYS' included with the Novell Client software and installed on the remote host is reportedly affected by a local privilege escalation vulnerability that allows a client to send a request to the kernel driver using crafted pointer and then execute code with kernel privileges.

Solution

Apply the patch referenced in the vendor advisory above.

Public Exploits

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

Here's the list of publicly known exploits and PoCs for verifying the Novell Client nwfs.sys Local Privilege Escalation vulnerability:

  1. Metasploit: exploit/windows/local/novell_client_nwfs
    [Novell Client 4.91 SP4 nwfs.sys Local Privilege Escalation]

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.

Risk Information

CVSS V2 Vector [?]: AV:L/AC:L/Au:N/C:C/I:C/A:C/E:F/RL:OF/RC:C
CVSS Base Score:7.2 (High)
Impact Subscore:10.0
Exploitability Subscore:3.9
CVSS Temporal Score:6.0 (Medium)
CVSS Environmental Score:NA (None)
Modified Impact Subscore:NA
Overall CVSS Score:6.0 (Medium)

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Plugin Source

This is the novell_nwfs_4_91_4_12.nasl nessus plugin source code. This script is Copyright (C) 2008-2018 Tenable Network Security, Inc. 

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

include("compat.inc");

if (description)
{
  script_id(33481);
  script_version("1.15");
  script_cvs_date("Date: 2018/07/16 14:09:15");

  script_cve_id("CVE-2008-3158");
  script_bugtraq_id(30001);
  script_xref(name:"Secunia", value:"30904");

  script_name(english:"Novell Client nwfs.sys Local Privilege Escalation");
  script_summary(english:"Checks file version of nwfs.sys");

  script_set_attribute(attribute:"synopsis", value:
"The remote Windows host contains a driver that is affected by a local
privilege escalation vulnerability.");
  script_set_attribute(attribute:"description", value:
"The file 'NWFS.SYS' included with the Novell Client software and
installed on the remote host is reportedly affected by a local
privilege escalation vulnerability that allows a client to send a
request to the kernel driver using crafted pointer and then execute
code with kernel privileges.");
  # http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5028543.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a4de64f2");
  script_set_attribute(attribute:"solution", value:"Apply the patch referenced in the vendor advisory above.");
  script_set_cvss_base_vector("CVSS2#AV:L/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:"exploit_framework_core", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Novell Client 4.91 SP4 nwfs.sys Local Privilege Escalation');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
  script_cwe_id(264);

  script_set_attribute(attribute:"patch_publication_date", value:"2008/06/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2008/07/11");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2008-2018 Tenable Network Security, Inc.");

  script_dependencies("smb_hotfixes.nasl");
  script_require_keys("SMB/Registry/Enumerated");
  script_require_ports(139, 445);

  exit(0);
}


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

if (!get_kb_item("SMB/Registry/Enumerated")) exit(1, "KB 'SMB/Registry/Enumerated' not set to TRUE.");


# Unless we're being paranoid, check whether the software's installed.
if (report_paranoia < 2)
{
  subkey = "Novell Client for Windows";
  key = string("SMB/Registry/HKLM/SOFTWARE/Microsoft/Windows/CurrentVersion/Uninstall/", subkey, "/DisplayName");
  get_kb_item_or_exit(key);
}


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

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


# Check the version of nwfs.sys.
winroot = hotfix_get_systemroot();
if (!winroot) exit(1);

share = ereg_replace(pattern:"^([A-Za-z]):.*", replace:"\1$", string:winroot);
sys =  ereg_replace(pattern:"^[A-Za-z]:(.*)", replace:"\1\System32\NetWare\nwfs.sys", string:winroot);

rc = NetUseAdd(login:login, password:pass, domain:domain, share:share);
if (rc != 1)
{
  NetUseDel();
  audit(AUDIT_SHARE_FAIL,share);
}

fh = CreateFile(
  file:sys,
  desired_access:GENERIC_READ,
  file_attributes:FILE_ATTRIBUTE_NORMAL,
  share_mode:FILE_SHARE_READ,
  create_disposition:OPEN_EXISTING
);

info = "";
if (!isnull(fh))
{
  ver = GetFileVersion(handle:fh);
  CloseFile(handle:fh);

  # nb: for older versions, the file version may be null.
  if (isnull(ver)) info = "  " + winroot + "\System32\NetWare\nwfs.sys (unknown file version" + ')\n';
  else
  {
    fix = split("4.91.4.12", sep:'.', keep:FALSE);
    for (i=0; i<max_index(fix); i++)
      fix[i] = int(fix[i]);

    for (i=0; i<max_index(ver); i++)
      if ((ver[i] < fix[i]))
      {
        version = string(ver[0], ".", ver[1], ".", ver[2], ".", ver[3]);
        info += "  " + winroot + "\System32\NetWare\nwfs.sys (file version=" + version + ')\n';
        break;
      }
      else if (ver[i] > fix[i])
        break;
  }
}
NetUseDel();


# Issue a report if a vulnerable file was found.
if (info)
{
  if (report_verbosity)
  {
    report = string(
      "\n",
      "The following file is affected :\n",
      "\n",
      info
    );
    security_hole(port:port, extra:report);
  }
  else 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/novell_nwfs_4_91_4_12.nasl
  • Windows:
    C:\ProgramData\Tenable\Nessus\nessus\plugins\novell_nwfs_4_91_4_12.nasl
  • Mac OS X:
    /Library/Nessus/run/lib/nessus/plugins/novell_nwfs_4_91_4_12.nasl

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How to Run

Here is how to run the Novell Client nwfs.sys Local Privilege Escalation as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

  1. Click to start a New Scan.
  2. Select Advanced Scan.
  3. Navigate to the Plugins tab.
  4. On the top right corner click to Disable All plugins.
  5. On the left side table select Windows plugin family.
  6. On the right side table select Novell Client nwfs.sys Local Privilege Escalation plugin ID 33481.
  7. Specify the target on the Settings tab and click to Save the scan.
  8. 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 novell_nwfs_4_91_4_12.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a novell_nwfs_4_91_4_12.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - novell_nwfs_4_91_4_12.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 novell_nwfs_4_91_4_12.nasl -t <IP/HOST>

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References

BID | SecurityFocus Bugtraq ID: Secunia Advisory: CWE | Common Weakness Enumeration:
  • CWE-264 (Category) Permissions, Privileges, and Access Controls
See also: Similar and related Nessus plugins:
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  • 53536 - Novell File Reporter Agent XML Tag Handling Buffer Overflow
  • 55471 - Novell File Reporter Engine RECORD Element Tag Parsing Overflow (credentialed check)
  • 43060 - Novell iPrint Client < 5.32 Multiple Overflows
  • 48364 - Novell iPrint Client < 5.42 Multiple Flaws
  • 48407 - Novell iPrint Client < 5.44 Multiple Vulnerabilities
  • 51367 - Novell iPrint Client < 5.56 Multiple Vulnerabilities
  • 56682 - Novell iPrint Client < 5.72 nipplib.dll GetDriverSettings Function Buffer Overflow
  • 31136 - Novell iPrint Control ActiveX (ienipp.ocx) ExecuteRequest() Method Overflow
  • 34049 - Novell iPrint Client ActiveX Control Multiple Vulnerabilities
  • 33227 - Novell iPrint Client for Windows ienipp.ocx ActiveX Multiple Variable Overflow
  • 36103 - Novell NetIdentity Agent < 1.2.4 Arbitrary Pointer De-reference Code Execution
  • 29898 - Novell Client nicm.sys Local Privilege Escalation
  • 25952 - Novell Client nwspool.dll RPC Printer Functions Remote Overflow (300870)
  • 23699 - Novell NetWare Client Print Provider (nwspool.dll) Multiple Function Overflow
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  • 47581 - Novell 'modulemanager' Servlet Arbitrary File Upload (intrusive check)
  • 47582 - Novell 'modulemanager' Servlet Arbitrary File Upload (safe check)
  • 62977 - Novell File Reporter Agent FSFUI UICMD 126 Arbitrary File Download
  • 62026 - Novell File Reporter Agent XML Parsing Remote Code Execution
  • 55544 - Novell File Reporter Engine RECORD Element Tag Parsing Overflow (uncredentialed check)
  • 20318 - Novell NetMail IMAP Agent Long Verb Arguments Remote Overflow
  • 62968 - Novell Sentinel Log Manager Authentication Bypass
  • 83289 - Novell ZENworks Configuration Management < 11.3.2 Remote Code Execution (intrusive check)
  • 66914 - Novell ZENworks Control Center File Upload Remote Code Execution (intrusive check)
  • 65551 - Novell ZENworks Mobile Management MDM.php Local File Inclusion
  • 64471 - Novell GroupWise Client 8.x < 8.0.3 Hot Patch 2 / 2012.x < 2012 SP1 Hot Patch 1 Multiple Vulnerabilities
  • 62283 - Novell GroupWise Internet Agent 8.x <= 8.0.2 HP3 / 12.x < 12.0.1 Multiple Vulnerabilities
  • 62284 - Novell GroupWise Internet Agent 8.x < 8.0.3 / 12.x < 12.0.1 Multiple Vulnerabilities
  • 33141 - Novell GroupWise Messenger Client < 2.0.3 HP1 Multiple Remote Overflows
  • 50695 - Novell GroupWise WebAccess Arbitrary File Download (local check)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file novell_nwfs_4_91_4_12.nasl version 1.15. For more plugins, visit the Nessus Plugin Library.

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