Microsoft Proxy Server/ISA Server Winsock Service resource consumption

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Microsoft Proxy Server and ISA Server. Affected by this issue is some unknown functionality of the component Winsock Service. This manipulation causes resource consumption. This vulnerability is registered as CVE-2003-0110. Remote exploitation of the attack is possible. No exploit is available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability classified as critical was found in Microsoft Proxy Server and ISA Server (Firewall Software) (the affected version is unknown). Affected by this vulnerability is an unknown code of the component Winsock Service. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. The summary by CVE is:

The Winsock Proxy service in Microsoft Proxy Server 2.0 and the Microsoft Firewall service in Internet Security and Acceleration (ISA) Server 2000 allow remote attackers to cause a denial of service (CPU consumption or packet storm) via a spoofed, malformed packet to UDP port 1745.

The weakness was published 05/05/2003 with Microsoft as MS03-012 as confirmed bulletin (Technet). It is possible to read the advisory at microsoft.com. This vulnerability is known as CVE-2003-0110 since 02/26/2003. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 11534 (MS03-012: Microsoft ISA Server Winsock Proxy DoS (331066)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 90120 (Flaw In Winsock Proxy Service and ISA Firewall Service Can Cause Denial of Service (MS03-012)).

Applying the patch MS03-012 is able to eliminate this problem. The bugfix is ready for download at microsoft.com. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (11752), Tenable (11534), SecurityFocus (BID 7314†) and Vulnerability Center (SBV-1449†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 11534
Nessus Name: MS03-012: Microsoft ISA Server Winsock Proxy DoS (331066)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: MS03-012

Timelineinfo

02/26/2003 🔍
04/09/2003 +42 days 🔍
04/09/2003 +0 days 🔍
04/13/2003 +4 days 🔍
05/05/2003 +22 days 🔍
05/05/2003 +0 days 🔍
05/05/2003 +0 days 🔍
07/16/2003 +72 days 🔍
08/11/2014 +4044 days 🔍
08/25/2025 +4032 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS03-012
Organization: Microsoft
Status: Confirmed

CVE: CVE-2003-0110 (🔍)
GCVE (CVE): GCVE-0-2003-0110
GCVE (VulDB): GCVE-100-20395

OVAL: 🔍

X-Force: 11752
SecurityFocus: 7314 - Microsoft Winsock Proxy Service Remote Denial Of Service Vulnerability
Vulnerability Center: 1449 - [MS03-012] DoS in Microsoft ISA Server via Spoofed Malformed UDP Packet, High

Entryinfo

Created: 08/11/2014 22:52
Updated: 08/25/2025 02:14
Changes: 08/11/2014 22:52 (60), 05/10/2019 18:09 (12), 08/25/2025 02:14 (18)
Complete: 🔍
Cache ID: 216:235:103

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