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<< Back VID 26134 Severity 40 Port 139,445 Protocol TCP Class SMB Detailed Description The hotfix (894549) for 'Remote Code Execution Vulnerability in SMTP' has not been applied. Microsoft Exchange 2000 Server and Microsoft Exchange Server 2003 are vulnerable to a buffer overflow vulnerability in SMTP extended verbs. SMTP extended verbs allow addition of new functionality to the SMTP protocol. An attacker who successfully exploited this vulnerability could remotely take complete control of an affected system. An unauthenticated attacker could seek to exploit this vulnerability by connecting to an SMTP port on the Exchange 2000 server and by issuing a specially-crafted extended verb request. This could allow an attacker to take any action on the system in the security context of the SMTP service. By default, the SMTP service runs as Local System. For Exchange 2003, an attacker who could authenticate as an account in Exchange Enterprise Servers or Exchange Domain Servers groups could exploit this vulnerability. * Note: This check requires an account with Guest or upper privileges which can access the registry of the remote host to scan. Absence of these condition will result in the check not being performed and a False Negative for all vulnerable hosts. * References: http://www.microsoft.com/technet/security/bulletin/ms05-021.mspx http://xforce.iss.net/xforce/alerts/id/193 * Platforms Affected: Microsoft Exchange 2000 Server SP3 Microsoft Exchange Server 2003 Microsoft Exchange Server 2003 SP1 Recommendation Apply the appropriate patch for your system, as listed in Microsoft Security Bulletin MS05-021 at http://www.microsoft.com/technet/security/bulletin/ms05-021.mspx -- OR -- Patches for Windows platforms are also available from the Microsoft Windows Update Web site, http://windowsupdate.microsoft.com . Windows Update detects what version of Windows you are running and offers the appropriate patch. Related URL CVE-2005-0560 (CVE) Related URL 13118 (SecurityFocus) Related URL 18388,18389,19843 (ISS)