Microsoft Jet Database Engine is prone to a buffer-overflow vulnerability because it fails to properly bounds-check user-supplied data. Remote attackers can exploit this issue to execute arbitrary machine code in the context of a user running the application. Successful exploits will compromise the affected application and possibly the underlying computer. Failed attacks will likely cause denial-of-service conditions. NOTE: Further details report that attackers are using malicious Word files to load specially crafted MDB files. Microsoft has released a knowledge base article (950627) documenting this attack vector. This issue does not affect Windows Server 2003 Service Pack 2, Windows XP Service Pack 3, Windows XP x64 edition Server Pack 2, Windows Vista, Windows Vista Service Pack 1 and Windows Server 2008 because they run a version of the Jet Database Engine that isn't vulnerable. This issue does affect the Jet Database Engine, Microsoft Word 2000 Service Pack 3, Microsoft Word 2002 Service Pack 3, Microsoft Word 2003 Service Pack 2, Microsoft Word 2003 Service Pack 3, Microsoft Word 2007, and Microsoft Word 2007 Service Pack 1 on Microsoft Windows 2000, Windows XP, or Windows Server 2003 Service Pack 1.
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 a successful exploit.
Run all software as a nonprivileged user with minimal access rights.
To reduce the impact of a successful exploit, run all applications with the least amount of privileges possible.
Do not accept or execute files from untrusted or unknown sources.
To reduce the likelihood of successful exploits, never handle files that originate from unfamiliar or untrusted sources.
Do not follow links provided by unknown or untrusted sources.
Web users should be cautious about following links to sites that are provided by unfamiliar or suspicious sources. Filtering HTML from emails may help remove a possible vector for transmitting malicious links to users.
Implement multiple redundant layers of security.
Various memory-protection schemes (such as nonexecutable and randomly mapped memory segments) may hinder an attacker's ability to exploit this vulnerability to execute arbitrary code.
The vendor released updates to address this issue. Please see the references for more information.