September 14, 2010
Microsoft Windows Local Security Authority Subsystem Service (LSASS) is prone to a privilege-escalation vulnerability. This issue occurs in Active Directory, Active Directory Application Mode (ADAM), and Active Directory Lightweight Directory Service (ADLDS).
An attacker can exploit this issue to execute arbitrary code with SYSTEM-level privileges. Successfully exploiting this issue will facilitate in the complete compromise of affected computers.
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- Microsoft Active Directory
- Microsoft Active Directory Application Mode (ADAM)
- Microsoft Active Directory Lightweight Directory Service
Block external access at the network boundary, unless external parties require service.
If global access isn't needed, filter access to the affected computer at the network boundary. Restricting access to only trusted computers and networks might greatly reduce the likelihood of successful exploits.
Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity. This may indicate exploit attempts or activity that results from successful exploits.
Implement multiple redundant layers of security.
As an added precaution, deploy memory-protection schemes (such as nonexecutable stack/heap configuration and randomly mapped memory segments). This may complicate exploits of memory-corruption vulnerabilities.
Microsoft has released patches and an advisory to address this issue. Please see the references for more information.
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