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

Critical Nessus Plugin ID 11921


Arbitrary code can be executed on the remote host.


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.


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

See Also

Plugin Details

Severity: Critical

ID: 11921

File Name: smb_nt_ms03-049.nasl

Version: $Revision: 1.55 $

Type: local

Agent: windows

Published: 2003/11/11

Modified: 2017/05/25

Dependencies: 57033, 13855

Risk Information

Risk Factor: Critical


Base Score: 10

Temporal Score: 8.3

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Temporal Vector: CVSS2#E:F/RL:OF/RC:C


Base Score: 9.8

Temporal Score: 9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:microsoft:windows

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2003/11/11

Vulnerability Publication Date: 2003/11/11

Exploitable With


Metasploit (MS03-049 Microsoft Workstation Service NetAddAlternateComputerName Overflow)

Reference Information

CVE: CVE-2003-0812

BID: 9011

OSVDB: 11461

CERT-CC: CA-2003-28

MSFT: MS03-049

CERT: 567620

MSKB: 828035, 828749