1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73
|
Rule:
--
Sid:
2253
--
Summary:
This event is generated when an attempt is made to exploit a known
vulnerability in Microsoft Exchange Server.
--
Impact:
Serious. Possible execution of arbitrary code and Denial of Service
(DoS).
--
Detailed Information:
A vulnerability exists in versions of Microsoft Exchange Server such
that it is possible for an attacker to execute arbitrary code or cause a
DoS condition on the server without the need for prior authentication as
a valid user.
It is possible for an attacker to connect to the Exchange server on port
25 and send an extended verb request to the server that will cause a
large amount of memory to be allocated. In Exchange Server 5.5 this may
cause a DoS, whilst in Exchange Server 2000 this same condition could
present the attacker with an opportunity to execute arbitrary code.
--
Affected Systems:
MIcrosoft Exchange Server 5.5
Microsoft Exchange Server 2000
--
Attack Scenarios:
The attacker can connect to port 25 of the server and send a specially
crafted verb request.
--
Ease of Attack:
Simple.
--
False Positives:
None known.
--
False Negatives:
None known.
--
Corrective Action:
Upgrade to the latest non-affected version of the software.
Apply the appropriate vendor supplied patches.
--
Contributors:
Sourcefire Research Team
Brian Caswell <bmc@sourcefire.com>
Nigel Houghton <nigel.houghton@sourcefire.com>
--
Additional References:
Microsoft Corp.
http://www.microsoft.com/technet/treeview/default.asp?url=/technet/security/bulletin/MS03-046.asp
CVE:
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0714
--
|