[Full-disclosure] [ GLSA 200505-20 ] Mailutils: Multiple vulnerabilities in imap4d and mail

From: Thierry Carrez (koon_at_gentoo.org)
Date: 05/27/05

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    Gentoo Linux Security Advisory GLSA 200505-20
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                                                http://security.gentoo.org/
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      Severity: High
         Title: Mailutils: Multiple vulnerabilities in imap4d and mail
          Date: May 27, 2005
          Bugs: #94053
            ID: 200505-20

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    Synopsis
    ========

    The imap4d server and the mail utility from GNU Mailutils contain
    multiple vulnerabilities, potentially allowing a remote attacker to
    execute arbitrary code with root privileges.

    Background
    ==========

    GNU Mailutils is a collection of mail-related utilities, including an
    IMAP4 server (imap4d) and a Mail User Agent (mail).

    Affected packages
    =================

        -------------------------------------------------------------------
         Package / Vulnerable / Unaffected
        -------------------------------------------------------------------
      1 net-mail/mailutils < 0.6-r1 >= 0.6-r1

    Description
    ===========

    infamous41d discovered several vulnerabilities in GNU Mailutils. imap4d
    does not correctly implement formatted printing of command tags
    (CAN-2005-1523), fails to validate the range sequence of the "FETCH"
    command (CAN-2005-1522), and contains an integer overflow in the
    "fetch_io" routine (CAN-2005-1521). mail contains a buffer overflow in
    "header_get_field_name()" (CAN-2005-1520).

    Impact
    ======

    A remote attacker can exploit the format string and integer overflow in
    imap4d to execute arbitrary code as the imap4d user, which is usually
    root. By sending a specially crafted email message, a remote attacker
    could exploit the buffer overflow in the "mail" utility to execute
    arbitrary code with the rights of the user running mail. Finally, a
    remote attacker can also trigger a Denial of Service by sending a
    malicious FETCH command to an affected imap4d, causing excessive
    resource consumption.

    Workaround
    ==========

    There are no known workarounds at this time.

    Resolution
    ==========

    All GNU Mailutils users should upgrade to the latest available version:

        # emerge --sync
        # emerge --ask --oneshot --verbose ">=net-mail/mailutils-0.6-r1"

    References
    ==========

      [ 1 ] CAN-2005-1520
            http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1520
      [ 2 ] CAN-2005-1521
            http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1521
      [ 3 ] CAN-2005-1522
            http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1522
      [ 4 ] CAN-2005-1523
            http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1523
      [ 5 ] iDEFENSE 05.25.05 advisories

    http://www.idefense.com/application/poi/display?type=vulnerabilities&showYear=2005

    Availability
    ============

    This GLSA and any updates to it are available for viewing at
    the Gentoo Security Website:

      http://security.gentoo.org/glsa/glsa-200505-20.xml

    Concerns?
    =========

    Security is a primary focus of Gentoo Linux and ensuring the
    confidentiality and security of our users machines is of utmost
    importance to us. Any security concerns should be addressed to
    security@gentoo.org or alternatively, you may file a bug at
    http://bugs.gentoo.org.

    License
    =======

    Copyright 2005 Gentoo Foundation, Inc; referenced text
    belongs to its owner(s).

    The contents of this document are licensed under the
    Creative Commons - Attribution / Share Alike license.

    http://creativecommons.org/licenses/by-sa/2.0

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