The remote host is vulnerable to a flaw in ntdll.dll which may allow an attacker to gain system privileges, by exploiting it thru, for instance, WebDAV in IIS5.0 (other services could be exploited, locally and/or remotely) Note : Microsoft recommends (quoted from advisory) that: If you have not already applied the MS03-007 patch from this bulletin, Microsoft recommends you apply the MS03-013 patch as it also corrects an additional vulnerability.

see http://www.microsoft.com/technet/security/bulletin/ms03-007.mspx or http://www.microsoft.com/technet/security/bulletin/MS03-013.mspx