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Vulnerability Note VU#619707Microsoft SQL Server contains buffer overflows in openrowset and opendatasource macrosOverviewMicrosoft SQL Server contains several buffer overflows in "functions that are associated with connecting to remote data sources through 'ad hoc names.'"I. DescriptionMicrosoft SQL Server versions 7.0 and 2000 contain buffer overflows in the openrowset and opendatasource macros. By calling these macros with an overly long provider name parameter, an intruder can interrupt the ordinary operation of the server or potentially execute arbitrary code with the privileges of the SQL server. For more information, seeIn order to exploit this vulnerability, an intruder would need to be able to call one of the vulnerable macros directly, or be able to supply an inappropriate argument to a script that uses one of the vulnerable macros. II. ImpactAn intruder can execute arbitrary code with the privileges of the SQL service account. If the privileges of the service account are elevated via VU#796313, this vulnerability may result in compromise of the server host.III. SolutionApply a patch as described in http://support.microsoft.com/support/misc/kblookup.asp?id=Q318268 or http://support.microsoft.com/support/misc/kblookup.asp?id=Q316333.
References
Our thanks to Microsoft Corporation for the information provided in their bulletin, and to Cesar Cerrudo, who reported this information on Bugtraq and NTBugTraq. This document was written by Shawn V. Hernan.
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