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MS Exchange build numbers for pentesting

Thu, Aug 31, 2006

Security How To's

Have you ever telnet’d to an MS Exchange server and wondered what Service Pack or Release version it was? I know I have. It can be a good way to double check what Nessus or another VA tool told you was a vulnerable version. CDOLive has a nice table that matches Version, Service Pack and release date for Exchange versions since 4.0. So the next time you see thison port 25:

220 mydomain.com Microsoft ESMTP MAIL Service, Version: 6.5.7226.6 ready at
Wed, 30 Aug 2006 16:11:32 -0400

you can tell that it is at least MS Exchange 2003 with Service Pack 1 installed. They don’t seem to cover the Small Business Server versions of Exchange. My SBS 2003 returns a version string of 6.0.3790.1830, which is not listed. They also don’t cover the myriad of hotfixes / updates that change a build number. Still a good reference though as a place to start.

Outlook build numbers are listed there as well.

–Chris

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Chris Harrington - who has written 153 posts on InfoSecPodcast.com.


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