[OpenPKG-SA-2004.051] OpenPKG Security Advisory (imapd)

From: OpenPKG (openpkg_at_openpkg.org)
Date: 11/29/04

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    ________________________________________________________________________

    OpenPKG Security Advisory The OpenPKG Project
    http://www.openpkg.org/security.html http://www.openpkg.org
    openpkg-security@openpkg.org openpkg@openpkg.org
    OpenPKG-SA-2004.051 29-Nov-2004
    ________________________________________________________________________

    Package: imapd
    Vulnerability: arbitrary code execution
    OpenPKG Specific: no

    Affected Releases: Affected Packages: Corrected Packages:
    OpenPKG CURRENT <= imapd-2.2.9-20041123 >= imapd-2.2.10-20041124
    OpenPKG 2.2 <= imapd-2.2.8-2.2.0 >= imapd-2.2.8-2.2.1
    OpenPKG 2.1 <= imapd-2.2.6-2.1.0 >= imapd-2.2.6-2.1.1

    Affected Releases: Dependent Packages: none

    Description:
      According to a security advisory from Stefan Esser [0], several
      vulnerabilities exist in Cyrus imapd. The updated OpenPKG packages fix
      all these problems.

      When the option "IMAPMAGICPLUS" is activated on a server, the
      "PROXY" and "LOGIN" commands suffer a standard stack overflow,
      because the username is not checked against a maximum length. The
      Common Vulnerabilities and Exposures (CVE) project assigned the id
      CAN-2004-1011 [2] to the problem.

      Due to a bug within the argument parser of the "PARTIAL" command
      buffer positions outside the allocated memory buffer may be accessed.
      The Common Vulnerabilities and Exposures (CVE) project assigned the id
      CAN-2004-1012 [3] to the problem.

      The argument parser of the "FETCH" command suffers a similar bug. The
      Common Vulnerabilities and Exposures (CVE) project assigned the id
      CAN-2004-1013 [4] to the problem.

      Under memory allocation failure conditions the "cmd_append" handler
      supporting "MULTIAPPENDS" may enter code paths doing post increments
      whose behavior is undefined in ANSI C. The same function also suffers
      from a integer wrap. No CVE id.
      
      Another "IMAPMAGICPLUS" overflow was later discovered by Thomas
      Klaeger in proxyd.c "proxyd_canon_user" function. The Common
      Vulnerabilities and Exposures (CVE) project assigned the id
      CAN-2004-1015 [5] to the problem.
      
      Sebastian Krahmer mentioned a missing NUL-termination in global.c and
      provided a patch. No CVE id.
      
      Please check whether you are affected by running "<prefix>/bin/openpkg
      rpm -q imapd". If you have the "imapd" package installed and its
      version is affected (see above), we recommend that you immediately
      upgrade it [6][7].

    Solution:
      Select the updated source RPM appropriate for your OpenPKG release
      [8][9], fetch it from the OpenPKG FTP service [10][11] or a mirror
      location, verify its integrity [12], build a corresponding binary RPM
      from it [6] and update your OpenPKG installation by applying the
      binary RPM [7]. For the most recent release OpenPKG 2.2, perform the
      following operations to permanently fix the security problem (for
      other releases adjust accordingly).

      $ ftp ftp.openpkg.org
      ftp> bin
      ftp> cd release/2.2/UPD
      ftp> get imapd-2.2.8-2.2.1.src.rpm
      ftp> bye
      $ <prefix>/bin/openpkg rpm -v --checksig imapd-2.2.8-2.2.1.src.rpm
      $ <prefix>/bin/openpkg rpm --rebuild imapd-2.2.8-2.2.1.src.rpm
      $ su -
      # <prefix>/bin/openpkg rpm -Fvh <prefix>/RPM/PKG/imapd-2.2.8-2.2.1.*.rpm

      Additionally, we recommend that you rebuild and reinstall
      all dependent packages (see above), if any, too [6][7].
    ________________________________________________________________________

    References:
      [0] http://security.e-matters.de/advisories/152004.html
      [1] http://asg.web.cmu.edu/cyrus/imapd/
      [2] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1011
      [3] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1012
      [4] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1013
      [5] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1015
      [6] http://www.openpkg.org/tutorial.html#regular-source
      [7] http://www.openpkg.org/tutorial.html#regular-binary
      [8] ftp://ftp.openpkg.org/release/2.2/UPD/imapd-2.2.8-2.2.1.src.rpm
      [9] ftp://ftp.openpkg.org/release/2.1/UPD/imapd-2.2.6-2.1.1.src.rpm
      [10] ftp://ftp.openpkg.org/release/2.2/UPD/
      [11] ftp://ftp.openpkg.org/release/2.1/UPD/
      [12] http://www.openpkg.org/security.html#signature
    ________________________________________________________________________

    For security reasons, this advisory was digitally signed with the
    OpenPGP public key "OpenPKG <openpkg@openpkg.org>" (ID 63C4CB9F) of the
    OpenPKG project which you can retrieve from http://pgp.openpkg.org and
    hkp://pgp.openpkg.org. Follow the instructions on http://pgp.openpkg.org/
    for details on how to verify the integrity of this advisory.
    ________________________________________________________________________

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