2020-06-23

Sızma Teşebbüsünde SQL Server Error Log Mesajları

Sızma testi(Pentest) yada gerçek sızma teşebbüslerinde SQL Server Error Log'da aşağıdaki mesajları birden çok kez görebilirsiniz. SQL Server Error Log'da aşağıdaki uyarıları bir yada birden çok kez gördüğünüzde Bilgi Güvenliği/Sistem Güvenliği ekipleri ile iletişime geçip veritabanı sisteminizi gözden geçirmenizde fayda var.
1.       Length specified in network packet payload did not match number of bytes read; the connection has been closed. Please contact the vendor of the client library. [CLIENT: X.X.X.X]



2.       Could not connect because the maximum number of '1' dedicated administrator connections already exists. Before a new connection can be made, the existing dedicated administrator connection must be dropped, either by logging off or ending the process. [CLIENT: X.X.X.X]

3.       The login packet used to open the connection is structurally invalid; the connection has been closed. Please contact the vendor of the client library. [CLIENT: X.X.X.X]

4.       Login failed for user 'sa'. Reason: Password did not match that for the login provided. [CLIENT: X.X.X.X]

5.       Login failed for user 'admin'. Reason: Could not find a login matching the name provided. [CLIENT: X.X.X.X]

6.       Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'. Reason: Could not find a login matching the name provided. [CLIENT: X.X.X.X]

7.       Login failed for user 'probe'. Reason: Could not find a login matching the name provided. [CLIENT: X.X.X.X]

8.       Login failed for user 'sql'. Reason: Could not find a login matching the name provided. [CLIENT: X.X.X.X]

9.       Login failed for user 'msi'. Reason: Could not find a login matching the name provided. [CLIENT: X.X.X.X]

10.   Login failed for user 'ELNAdmin'. Reason: Could not find a login matching the name provided. [CLIENT: X.X.X.X]

11.   Login failed for user 'lansweeperuser'. Reason: Could not find a login matching the name provided. [CLIENT: X.X.X.X]

12.   Login failed for user 'ohu9rI95'. Reason: Could not find a login matching the name provided. [CLIENT: X.X.X.X]

13.   Login failed for user 'WinCCConnect'. Reason: Could not find a login matching the name provided. [CLIENT: X.X.X.X]

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