By default, Microsoft SQL Server installs with a default password. The 'sa' account has a null password which is publicly known and documented. This allows remote attackers to trivially access the program or system.
Classification
Location:
Remote/Network Access Required
Attack Type:
Authentication Management
Impact:
Loss of Integrity
Exploit:
Exploit Available
Disclosure:
OSVDB Verified
Solution
Currently, there are no known upgrades or patches to correct this issue. It is possible to correct the flaw by implementing the following workaround: secure the 'sa' account with a password.