Date Discovered April 12, 2011
Description Microsoft Windows is prone to a remote code-execution vulnerability that affects the SMB client.
Successful exploits can allow attackers to execute arbitrary code with full user rights. Successfully exploiting this issue will result in the complete compromise of affected computers. Failed exploit attempts will result in a denial-of-service condition.
Run all software as a nonprivileged user with minimal access rights. To reduce the impact of latent vulnerabilities, always run nonadministrative software as an unprivileged user with minimal access rights.
Deploy network intrusion detection systems to monitor network traffic for malicious activity. Deploy NIDS to monitor network traffic for signs of suspicious or anomalous activity. This may help detect malicious actions that an attacker may take after successfully exploiting vulnerabilities in
applications. Review all applicable logs regularly.
Do not use client software to access unknown or untrusted hosts from critical systems. Due to the nature of this issue, avoid using the client application to connect to unknown or untrusted hosts.
Implement multiple redundant layers of security.
Since this issue may be leveraged to execute code, we recommend memory-protection schemes, such as nonexecutable stack/heap configurations and randomly mapped memory segments. This tactic may complicate exploits of memory-corruption vulnerabilities.
Updates are available. Please see the references for more information.
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