MS03-049: Buffer Overflow in the Workstation Service (828749) - Nessus

Critical Plugin ID: 11921

This page contains detailed information about the MS03-049: Buffer Overflow in the Workstation Service (828749) 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: 11921
Name: MS03-049: Buffer Overflow in the Workstation Service (828749)
Filename: smb_nt_ms03-049.nasl
Vulnerability Published: 2003-11-11
This Plugin Published: 2003-11-11
Last Modification Time: 2018-11-15
Plugin Version: 1.57
Plugin Type: local
Plugin Family: Windows : Microsoft Bulletins
Dependencies: ms_bulletin_checks_possible.nasl, smb_hotfixes.nasl
Required KB Items [?]: SMB/MS_Bulletin_Checks/Possible

Vulnerability Information

Severity: Critical
Vulnerability Published: 2003-11-11
Patch Published: 2003-11-11
CVE [?]: CVE-2003-0812
CPE [?]: cpe:/o:microsoft:windows

Synopsis

Arbitrary code can be executed on the remote host.

Description

The remote version of Windows contains a flaw in the function NetpValidateName() in the WorkStation service that could allow an attacker to execute arbitrary code on the remote host with the SYSTEM privileges.

A series of worms (Welchia, Spybot, ...) are known to exploit this vulnerability in the wild.

Solution

Microsoft has released a set of patches for Windows 2000 and XP.

Public Exploits

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

Here's the list of publicly known exploits and PoCs for verifying the MS03-049: Buffer Overflow in the Workstation Service (828749) vulnerability:

Metasploit: exploit/windows/smb/ms03_049_netapi
[MS03-049 Microsoft Workstation Service NetAddAlternateComputerName Overflow]
Exploit-DB: exploits/windows/remote/16378.rb
[EDB-16378: Microsoft Workstation Service - NetAddAlternateComputerName Overflow (MS03-049) (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: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)

CVSS V3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C

CVSS Base Score:	9.8 (Critical)
Impact Subscore:	5.9
Exploitability Subscore:	3.9
CVSS Temporal Score:	9.1 (Critical)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	9.1 (Critical)

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Plugin Source

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

include("compat.inc");

if (description)
{
 script_id(11921);
 script_version("1.57");
 script_cvs_date("Date: 2018/11/15 20:50:29");

 script_cve_id("CVE-2003-0812");
 script_bugtraq_id(9011);
 script_xref(name:"CERT-CC", value:"CA-2003-28");
 script_xref(name:"MSFT", value:"MS03-049");
 script_xref(name:"CERT", value:"567620");
 script_xref(name:"MSKB", value:"828035");
 script_xref(name:"MSKB", value:"828749");

 script_name(english:"MS03-049: Buffer Overflow in the Workstation Service (828749)");
 script_summary(english:"Checks for hotfix 828749");

 script_set_attribute(attribute:"synopsis", value:"Arbitrary code can be executed on the remote host.");
 script_set_attribute(attribute:"description", value:
"The remote version of Windows contains a flaw in the function
NetpValidateName() in the WorkStation service that could allow an
attacker to execute arbitrary code on the remote host with the SYSTEM
privileges.

A series of worms (Welchia, Spybot, ...) are known to exploit this
vulnerability in the wild.");
 script_set_attribute(attribute:"see_also", value:"https://docs.microsoft.com/en-us/security-updates/SecurityBulletins/2003/ms03-049");
 script_set_attribute(attribute:"solution", value:"Microsoft has released a set of patches for Windows 2000 and XP.");
 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_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
 script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/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:'MS03-049 Microsoft Workstation Service NetAddAlternateComputerName Overflow');
 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:"2003/11/11");
 script_set_attribute(attribute:"patch_publication_date", value:"2003/11/11");
 script_set_attribute(attribute:"plugin_publication_date", value:"2003/11/11");

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

 script_category(ACT_GATHER_INFO);

 script_copyright(english:"This script is Copyright (C) 2003-2018 Tenable Network Security, Inc.");
 script_family(english:"Windows : Microsoft Bulletins");

 script_dependencies("smb_hotfixes.nasl", "ms_bulletin_checks_possible.nasl");
 script_require_keys("SMB/MS_Bulletin_Checks/Possible");
 script_require_ports(139, 445, 'Host/patch_management_checks');
 exit(0);
}

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

get_kb_item_or_exit("SMB/MS_Bulletin_Checks/Possible");

bulletin = 'MS03-049';
kbs = make_list("828035", "828749");
if (get_kb_item("Host/patch_management_checks")) hotfix_check_3rd_party(bulletin:bulletin, kbs:kbs, severity:SECURITY_HOLE);

get_kb_item_or_exit("SMB/Registry/Enumerated");
get_kb_item_or_exit("SMB/WindowsVersion", exit_code:1);

if (hotfix_check_sp_range(win2k:'2,4', xp:'0,1') <= 0) audit(AUDIT_OS_SP_NOT_VULN);

rootfile = hotfix_get_systemroot();
if (!rootfile) exit(1, "Failed to get the system root.");

share = hotfix_path2share(path:rootfile);
if (!is_accessible_share(share:share)) audit(AUDIT_SHARE_FAIL, share);


if (
  hotfix_is_vulnerable(os:"5.1", sp:1, file:"Msasn1.dll", version:"5.1.2600.1309", dir:"\system32", bulletin:bulletin, kb:'828035') ||
  hotfix_is_vulnerable(os:"5.1", sp:0, file:"Msasn1.dll", version:"5.1.2600.121", dir:"\system32", bulletin:bulletin, kb:'828035') ||

  hotfix_is_vulnerable(os:"5.0", file:"wkssvc.dll", version:"5.0.2195.6862", dir:"\system32", bulletin:bulletin, kb:'828749')
)
{
  set_kb_item(name:"SMB/Missing/"+bulletin, value:TRUE);
  hotfix_security_hole();
  hotfix_check_fversion_end();
  exit(0);
}
else
{
  hotfix_check_fversion_end();
  audit(AUDIT_HOST_NOT, 'affected');
}

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

Linux / Unix:
/opt/nessus/lib/nessus/plugins/smb_nt_ms03-049.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\smb_nt_ms03-049.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/smb_nt_ms03-049.nasl

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How to Run

Here is how to run the MS03-049: Buffer Overflow in the Workstation Service (828749) 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 : Microsoft Bulletins plugin family.
On the right side table select MS03-049: Buffer Overflow in the Workstation Service (828749) plugin ID 11921.
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_nt_ms03-049.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a smb_nt_ms03-049.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - smb_nt_ms03-049.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_nt_ms03-049.nasl -t <IP/HOST>

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References

BID | SecurityFocus Bugtraq ID:

9011

MSKB | Microsoft Knowledge Base:

828035, 828749

MSFT | Microsoft Security Bulletin:

MS03-049

CERT | Computer Emergency Response Team:

567620

CERT-CC | CERT Coordination Center:

CA-2003-28

See also:

Similar and related Nessus plugins:

11212 - MS03-001: Unchecked buffer in Locate Service (810833)
11413 - MS03-007: Unchecked Buffer in ntdll.dll (815021)
11790 - MS03-026 / MS03-039: Buffer Overrun In RPCSS Service Could Allow Code Execution (823980 / 824146)
11808 - MS03-026: Microsoft RPC Interface Buffer Overrun (823980) (uncredentialed check)
11889 - Exchange XEXCH50 Remote Buffer Overflow
11923 - Microsoft FrontPage Server Extensions (fp30reg.dll) Debug Function Remote Overflow (MS03-051 / 813360)
11412 - Microsoft IIS WebDAV ntdll.dll Remote Overflow (MS03-007)
11664 - Microsoft Media Services ISAPI nsiislog.dll Multiple Overflows
34404 - MS08-059: Microsoft Host Integration Server (HIS) SNA RPC Request Remote Overflow (956695)
34407 - MS08-062: Microsoft IIS IPP Service Unspecified Remote Overflow (953155)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file smb_nt_ms03-049.nasl version 1.57. For more plugins, visit the Nessus Plugin Library.

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MS03-049: Buffer Overflow in the Workstation Service (828749) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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