Microsoft SQL Server 2000 Resolution Service Denial of Service Vulnerability

BID:5312

Info

Microsoft SQL Server 2000 Resolution Service Denial of Service Vulnerability

Bugtraq ID: 5312
Class: Failure to Handle Exceptional Conditions
CVE:
Remote: Yes
Local: No
Published: Jul 25 2002 12:00AM
Updated: Jul 25 2002 12:00AM
Credit: Discovery credited to David Litchfield of Next Generation Security Software Ltd.
Vulnerable: Microsoft SQL Server 2000 SP2
Microsoft SQL Server 2000 SP1
- Microsoft Windows 2000 Professional SP2
 - Microsoft Windows 2000 Professional SP1
 - Microsoft Windows 2000 Professional
- Microsoft Windows NT 4.0 SP6a
 - Microsoft Windows NT 4.0 SP6
 - Microsoft Windows NT 4.0 SP5
 Microsoft SQL Server 2000
- Microsoft Windows 2000 Professional SP2
 - Microsoft Windows 2000 Professional SP1
 - Microsoft Windows 2000 Professional
- Microsoft Windows NT 4.0 SP6a
 - Microsoft Windows NT 4.0 SP6
 - Microsoft Windows NT 4.0 SP5
 - Microsoft Windows NT 4.0
Not Vulnerable: Microsoft SQL Server 2000 SP3

Discussion

Microsoft SQL Server 2000 Resolution Service Denial of Service Vulnerability

Microsoft SQL Server 2000 uses a keep-alive mechanism which operates through the Resolution Service.

If a particularly crafted data packet is sent to the SQL Server's keep-alive function, it will respond with an identical packet. If one such packet was sent to an SQL Server from another SQL Server, they would begin an infinite loop of keep-alive packets. Eventually, the servers will consume all available resources, resulting in a denial of services.

Exploit / POC

Microsoft SQL Server 2000 Resolution Service Denial of Service Vulnerability

Currently we are not aware of any exploits for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected] <mailto:[email protected]>.

Solution / Fix

References

Microsoft SQL Server 2000 Resolution Service Denial of Service Vulnerability

References:

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