Microsoft ISA Server 2000 Proxy Service memory leak

CVSS Meta Temp Score
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CTI Interest Score
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3.8$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Microsoft ISA Server 2000. The affected element is an unknown function of the component Proxy Service. The manipulation leads to memory leak. This vulnerability is referenced as CVE-2001-0547. No exploit is available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in Microsoft ISA Server 2000 (Firewall Software) and classified as problematic. This issue affects an unknown functionality of the component Proxy Service. The manipulation with an unknown input leads to a memory leak vulnerability. Using CWE to declare the problem leads to CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. Impacted is availability. The summary by CVE is:

Memory leak in the proxy service in Microsoft Internet Security and Acceleration (ISA) Server 2000 allows local attackers to cause a denial of service (resource exhaustion).

The weakness was published 09/20/2001 with Microsoft as MS01-045 as confirmed bulletin (Technet). It is possible to read the advisory at microsoft.com. The identification of this vulnerability is CVE-2001-0547. The exploitation is known to be easy. Attacking locally is a requirement. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 86199 (Microsoft ISA Server Proxy Service Memory Leak Denial of Service Vulnerability (MS01-045)).

Applying the patch MS01-045 is able to eliminate this problem. The bugfix is ready for download at microsoft.com.

The vulnerability is also documented in the databases at X-Force (6990), SecurityFocus (BID 3197†) and Vulnerability Center (SBV-3617†). Similar entries are available at VDB-17374 and VDB-17388. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.8

VulDB Base Score: 4.0
VulDB Temp Score: 3.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory leak
CWE: CWE-401 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: MS01-045

Timelineinfo

08/16/2001 🔍
08/16/2001 +0 days 🔍
09/20/2001 +35 days 🔍
09/20/2001 +0 days 🔍
01/28/2004 +860 days 🔍
07/09/2014 +3815 days 🔍
10/05/2025 +4106 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS01-045
Organization: Microsoft
Status: Confirmed

CVE: CVE-2001-0547 (🔍)
GCVE (CVE): GCVE-0-2001-0547
GCVE (VulDB): GCVE-100-17375
X-Force: 6990 - Microsoft ISA Server Proxy Service memory leak denial of service
SecurityFocus: 3197 - Microsoft ISA Server Proxy Service Memory Leak Denial of Service Vulnerability
Vulnerability Center: 3617 - DoS in Microsoft ISA Server 2000 due to a Memory Leak in the Proxy Service, Low

See also: 🔍

Entryinfo

Created: 07/09/2014 12:25
Updated: 10/05/2025 19:40
Changes: 07/09/2014 12:25 (44), 05/19/2019 15:02 (22), 10/05/2025 19:40 (18)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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