Microsoft Internet Explorer is prone to a buffer-overflow vulnerability because it fails to perform adequate boundary checks on user-supplied data. This issue occurs when rendering VML (Vector Markup Language) graphics. Attackers can leverage this issue to execute arbitrary code in the context of the currently logged-in user. Successful attacks may facilitate the remote compromise of affected computers. Failed attacks will likely cause denial-of-service conditions.
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 anomalous or suspicious activity. This includes but is not limited to requests that include NOP sleds and unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits.
Do not follow links provided by unknown or untrusted sources.
To reduce the likelihood of successful exploits, never visit sites of questionable integrity or follow links provided by unfamiliar or untrusted sources.
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.
Do not open email messages from unknown or untrusted individuals.
Filtering HTML from emails may help remove a possible vector for transmitting malicious documents.
Microsoft released security advisory MS07-050 and updates to address this issue. Please see the references for more information.