7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
0.974 High
EPSS
Percentile
99.9%
The Microsoft SQL Server contains a vulnerability that allows remote attackers to execute arbitrary commands with system privileges.
The Microsoft SQL Server typically runs under a dedicated “service account” that is defined by system administrators at installation time. This definition is stored in the Windows registry with permissions that allow the SQL Server to change the value of the registry key. As a result, attackers with access to the “xp_regwrite” extended stored procedure can alter this registry key and cause the SQL Server to use the LocalSystem account as its service account. Upon rebooting the server host or restarting the SQL service, the SQL Server will run with the full administrative privileges of the LocalSystem account. This ability allows a remote attacker to submit SQL queries that can execute any command on the system with the privileges of the operating system.
As a precondition, this vulnerability requires the ability to modify the SQL service account registry key (for example, via the “xp_regwrite” extended stored procedure). Attackers must convince an administrator to grant this access, or they must obtain it by exploiting a second vulnerability.
This vulnerability allows attackers to weaken the security policy of the SQL Server by elevating its privileges and causing it to run in the LocalSystem security context. As a side effect, it increases the severity of vulnerabilities that allow attackers to gain the privileges of the SQL service account. In some cases, this may enable attackers to compromise the server host as well.
Apply a patch
Microsoft has published Security Bulletin MS02-034 to address this vulnerability. For more information, please see
http://www.microsoft.com/technet/security/bulletin/MS02-034.asp
This vulnerability also affects any products that include the Microsoft Desktop Engine (MSDE) 2000. For more information, please see
http://www.microsoft.com/technet/security/MSDEapps.asp
796313
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Notified: April 24, 2002 Updated: July 25, 2002
Affected
We have not received a statement from the vendor.
The vendor has not provided us with any further information regarding this vulnerability.
Microsoft has published Security Bulletin MS02-034 to address this vulnerability. For more information, please see
http://www.microsoft.com/technet/security/bulletin/MS02-034.asp
If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23796313 Feedback>).
Group | Score | Vector |
---|---|---|
Base | ||
Temporal | ||
Environmental |
This vulnerability was discovered by Bronek Kozicki and reported to the Bugtraq mailing list on April 18, 2002.
This document was written by Jeffrey P. Lanza and is based upon information provided by Microsoft.
CVE IDs: | CVE-2002-0642 |
---|---|
CERT Advisory: | CA-2002-22 Severity Metric: |