CVE-2004-0840
HighSummary
The vulnerability in the SMTP component of Windows XP 64-bit, Windows Server 2003, and the Exchange Routing Engine component of Exchange Server 2003 allows a remote attacker to execute arbitrary code by sending a malicious DNS response with improperly validated length values.
Risk Assessment
An attacker can remotely take control of the vulnerable server, leading to compromise of confidentiality, integrity, and availability of the system and potentially the entire email infrastructure.
Recommendation
Apply the security update provided by Microsoft in bulletin MS04-035 immediately and consider restricting trust in DNS responses from untrusted sources.
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Original NVD description (English source)
The SMTP (Simple Mail Transfer Protocol) component of Microsoft Windows XP 64-bit Edition, Windows Server 2003, Windows Server 2003 64-bit Edition, and the Exchange Routing Engine component of Exchange Server 2003, allows remote attackers to execute arbitrary code via a malicious DNS response message containing length values that are not properly validated.