Rule:--Sid:2590--Summary:This event is generated when an attempt is made to exploit a buffer overflow associated with the Mail Transfer Agent Exim.--Impact:A successful attack may allow the execution of arbitrary code on a vulnerable server with the privilege of the process running Exim.--Detailed Information:Exim is vulnerable to a buffer overflow, permitting an attacker to execute arbitrary code.  The vulnerability may be exploited if Exim is configured to verify header syntax in the e-mail message body.  This is not the default configuration.  If an attacker supplies a large number of spaces after certain header fields, it may be possible to cause a buffer overflow.--Affected Systems:Exim prior to version 4.34--Attack Scenarios:An attacker can create and send mail with a malformed header, possibly causing a buffer overflow and permitting the execution of arbitrary code.--Ease of Attack:Simple.--False Positives:None known.--False Negatives:None known.--Corrective Action:Upgrade to the latest non-affected version of the software.--Contributors:Sourcefire Vulnerability Research TeamJudy Novak <judy.novak@sourcefire.com>--Additional ReferencesBugtraq:http://www.securityfocus.com/bid/10291CVE:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0400--