Microsoft Windows NT 4.0/2000/XP/Server 2003 RPC over HTTP Reply denial of service

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability, which was classified as critical, was found in Microsoft Windows NT 4.0/2000/XP/Server 2003 (Operating System). This affects some unknown functionality of the component RPC over HTTP Reply Handler. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

Buffer overflow in the COM Internet Services and in the RPC over HTTP Proxy components for Microsoft Windows NT Server 4.0, NT 4.0 Terminal Server Edition, 2000, XP, and Server 2003 allows remote attackers to cause a denial of service via a crafted request.

The weakness was disclosed 04/13/2004 with eEye Digital Security as MS04-012 as confirmed bulletin (Technet). The advisory is shared at This vulnerability is uniquely identified as CVE-2003-0807 since 09/18/2003. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 12206 (MS04-012: Microsoft Hotfix (credentialed check) (828741)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins. The commercial vulnerability scanner Qualys is able to test this issue with plugin 68528 (Multiple Microsoft Windows RPC/DCOM Vulnerabilities (MS04-012)).

Applying the patch MS04-012 is able to eliminate this problem. The bugfix is ready for download at A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (15709) and Tenable (12206). Further details are available at The entries 331, 596 and 598 are pretty similar.







CPE 2.3info

CPE 2.2info


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VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
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Class: Denial of service
CWE: CWE-404
ATT&CK: T1499

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Nessus ID: 12206
Nessus Name: MS04-012: Microsoft Hotfix (credentialed check) (828741)
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Recommended: Patch
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Patch: MS04-012


09/18/2003 🔍
04/13/2004 +208 days 🔍
04/13/2004 +0 days 🔍
04/13/2004 +0 days 🔍
04/13/2004 +0 days 🔍
04/13/2004 +0 days 🔍
04/14/2004 +0 days 🔍
04/14/2004 +0 days 🔍
06/01/2004 +48 days 🔍
03/09/2021 +6125 days 🔍



Advisory: MS04-012
Organization: eEye Digital Security
Status: Confirmed

CVE: CVE-2003-0807 (🔍)

X-Force: 15709 - Microsoft Windows COM Internet Service and RPC over HTTP denial of service, Medium Risk
SecurityTracker: 1009762 - Microsoft Windows COM Internet Services and RPC over HTTP Can Be Crashed By Remote Users
Vulnerability Center: 4112 - [MS04-012] DoS in Microsoft Windows COM Internet Service, Medium
SecurityFocus: 10123
Secunia: 11065 - Microsoft Windows RPC/DCOM Multiple Vulnerabilities, Moderately Critical
OSVDB: 5246 - Microsoft Windows CIS/RPC Over HTTP DoS

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Created: 04/14/2004 11:04 AM
Updated: 03/09/2021 01:23 PM
Changes: 04/14/2004 11:04 AM (93), 04/30/2019 03:08 PM (2), 03/09/2021 01:23 PM (2)
Complete: 🔍


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