Microsoft SQL Server 2000 Authentication Hello memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.8$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Microsoft SQL Server 2000. Affected by this issue is some unknown functionality of the component Authentication. Such manipulation of the argument Hello leads to memory corruption. This vulnerability is referenced as CVE-2002-1123. Furthermore, an exploit is available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability was found in Microsoft SQL Server 2000 (Database Software). It has been rated as critical. Affected by this issue is an unknown code block of the component Authentication. The manipulation of the argument Hello with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Buffer overflow in the authentication function for Microsoft SQL Server 2000 and Microsoft Desktop Engine (MSDE) 2000 allows remote attackers to execute arbitrary code via a long request to TCP port 1433, aka the "Hello" overflow.

The weakness was published 09/24/2002 by Dave Aitel with Immunity as not defined posting (Bugtraq). The advisory is shared for download at online.securityfocus.com. This vulnerability is handled as CVE-2002-1123. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known.

The exploit is available at securityfocus.com. It is declared as highly functional. As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 11067 (Microsoft SQL Server Authentication Function Remote Overflow), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Databases and running in the context r.

Applying a patch is able to eliminate this problem. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 1396.

The vulnerability is also documented in the databases at X-Force (9788), Exploit-DB (16398), Tenable (11067), SecurityFocus (BID 5411†) and Vulnerability Center (SBV-894†). Similar entry is available at VDB-19515. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.8

VulDB Base Score: 7.3
VulDB Temp Score: 6.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 11067
Nessus Name: Microsoft SQL Server Authentication Function Remote Overflow
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 11067
OpenVAS Name: Microsofts SQL Hello Overflow
OpenVAS File: 🔍
OpenVAS Family: 🔍

Saint ID: exploit_info/ms_sql_server_hello
Saint Name: Microsoft SQL Server Hello buffer overflow

MetaSploit ID: ms02_056_hello.rb
MetaSploit Name: MS02-056 Microsoft SQL Server Hello Overflow
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍
Suricata ID: 2002845
Suricata Class: 🔍
Suricata Message: 🔍

TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍

Timelineinfo

08/06/2002 🔍
08/07/2002 +1 days 🔍
09/24/2002 +48 days 🔍
09/24/2002 +0 days 🔍
09/24/2002 +0 days 🔍
02/09/2003 +138 days 🔍
07/23/2014 +4182 days 🔍
06/23/2025 +3988 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: online.securityfocus.com⛔
Researcher: Dave Aitel
Organization: Immunity
Status: Confirmed

CVE: CVE-2002-1123 (🔍)
GCVE (CVE): GCVE-0-2002-1123
GCVE (VulDB): GCVE-100-18800
X-Force: 9788 - Microsoft SQL Server pre-authentication buffer overflow
SecurityFocus: 5411 - Microsoft SQL Server User Authentication Remote Buffer Overflow Vulnerability
Vulnerability Center: 894 - [MS02-056] Microsoft SQL Server User Authentication Remote Buffer Overflow Vulnerability, Critical

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

Entryinfo

Created: 07/23/2014 11:20
Updated: 06/23/2025 09:39
Changes: 07/23/2014 11:20 (91), 05/09/2019 11:43 (2), 06/23/2025 09:39 (19)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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