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VID 12055
Severity 40
Port 25
Protocol TCP
Class SMTP
Detailed Description MERCUR Mailserver is vulnerable to a buffer overflow vulnerability via long AUTH command.
The 4.2 versions without SP3a and earlier versions of MERCUR Mailserver can be affected a buffer overflow vulnerability, caused by improperly checking boundary in the Base64 decoding when handling data supplied with the "AUTH" command. By supplying overly long, specially crafted login data, a remote attacker can cause a buffer overflow and can crash the Mailserver or execute arbitrary code on the target system.

* References:
http://www.secunia.com/advisories/10038/

* Platforms Affected:
Atrium Software MERCUR Mailserver 3.3, SP1 ~ SP2
Atrium Software MERCUR Mailserver 4.0 1, SP1
Atrium Software MERCUR Mailserver 4.2, SP1 ~ SP2
Microsoft Windows Any version
Recommendation Upgrade to MERCUR Mailserver version 4.2 and Apply Service Pack 3a from the atrium software Web site at http://www.atrium-software.com/mail%20server/pub/mcr42sp3a.html
Related URL CVE-2003-1177 (CVE)
Related URL 8861,8889 (SecurityFocus)
Related URL 13468 (ISS)