Microsoft Windows NT 4.0/2000/XP RPC Endpoint Mapper null pointer dereference

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.8$0-$5k0.00

Summaryinfo

A vulnerability was found in Microsoft Windows NT 4.0/2000/XP. It has been rated as problematic. Affected by this issue is some unknown functionality of the component RPC Endpoint Mapper. Performing a manipulation results in null pointer dereference. This vulnerability is reported as CVE-2002-1561. Moreover, an exploit is present. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Microsoft Windows NT 4.0/2000/XP (Operating System). This affects an unknown function of the component RPC Endpoint Mapper. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. The summary by CVE is:

The RPC component in Windows 2000, Windows NT 4.0, and Windows XP allows remote attackers to cause a denial of service (disabled RPC service) via a malformed packet to the RPC Endpoint Mapper at TCP port 135, which triggers a null pointer dereference.

The weakness was disclosed 04/02/2003 by Dave Aitel with Immunity as confirmed advisory (CERT.org). It is possible to read the advisory at kb.cert.org. This vulnerability is uniquely identified as CVE-2002-1561 since 03/23/2003. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are unknown but a public exploit is available.

The exploit is shared for download at securityfocus.com. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 11159 (MS03-010: Microsoft Windows RPC Endpoint Manager Malformed Packet DoS (331953) (intrusive check)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 90534 (Microsoft Windows RPC Endpoint Mapper Remote Denial of Service Vulnerability (MS03-010)).

Upgrading eliminates this vulnerability. Attack attempts may be identified with Snort ID 3238. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 1450.

The vulnerability is also documented in the databases at X-Force (12533), Exploit-DB (21951), Tenable (11159), SecurityFocus (BID 6005†) and Vulnerability Center (SBV-1293†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Support

  • end of life (old version)

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 11159
Nessus Name: MS03-010: Microsoft Windows RPC Endpoint Manager Malformed Packet DoS (331953) (intrusive check)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 11159
OpenVAS Name: MS RPC Services null pointer reference DoS
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Snort ID: 3238
Snort Message: OS-WINDOWS DCERPC NCACN-IP-TCP irot IrotIsRunning/Revoke overflow attempt
Snort Class: 🔍

Suricata ID: 2103238
Suricata Class: 🔍
Suricata Message: 🔍

TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

SourceFire IPS: 🔍
ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍

Timelineinfo

10/18/2002 🔍
10/22/2002 +4 days 🔍
11/20/2002 +30 days 🔍
03/23/2003 +123 days 🔍
04/02/2003 +9 days 🔍
04/02/2003 +0 days 🔍
06/25/2003 +83 days 🔍
08/08/2014 +4062 days 🔍
09/04/2025 +4045 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: kb.cert.org
Researcher: Dave Aitel
Organization: Immunity
Status: Confirmed

CVE: CVE-2002-1561 (🔍)
GCVE (CVE): GCVE-0-2002-1561
GCVE (VulDB): GCVE-100-20307

OVAL: 🔍

CERT: 🔍
X-Force: 12533
SecurityFocus: 6005 - Microsoft Windows RPC Service Denial of Service Vulnerability
Vulnerability Center: 1293 - [MS03-010] DoS in RPC Service on Windows NT / XP / 2000, High

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/08/2014 12:36
Updated: 09/04/2025 04:53
Changes: 08/08/2014 12:36 (75), 09/17/2018 07:14 (14), 12/31/2024 03:27 (17), 04/26/2025 08:05 (1), 09/04/2025 04:53 (2)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Are you interested in using VulDB?

Download the whitepaper to learn more about our service!