[Full-Disclosure] [ GLSA 200405-09 ] ProFTPD Access Control List bypass vulnerability

From: Kurt Lieber (klieber_at_gentoo.org)
Date: 05/19/04

  • Next message: Curt Sampson: "[Full-Disclosure] Re: Buffer Overflow in ActivePerl ?" 
    To: gentoo-announce@lists.gentoo.org
Date: Wed, 19 May 2004 08:03:40 -0400

    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    Gentoo Linux Security Advisory GLSA 200405-09
    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                                http://security.gentoo.org/
    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

      Severity: High
         Title: ProFTPD Access Control List bypass vulnerability
          Date: May 19, 2004
          Bugs: #49496
            ID: 200405-09

    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    Synopsis
    ========

    Version 1.2.9 of ProFTPD introduced a vulnerability that causes
    CIDR-based Access Control Lists (ACLs) to be treated as "AllowAll",
    thereby allowing remote users full access to files available to the
    FTP daemon.

    Background
    ==========

    ProFTPD is an FTP daemon.

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

        -------------------------------------------------------------------
         Package / Vulnerable / Unaffected
        -------------------------------------------------------------------
      1 net-ftp/proftpd == 1.2.9-r1 >= 1.2.9-r2
      1 net-ftp/proftpd == 1.2.9 >= 1.2.9-r2

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

    ProFTPD 1.2.9 introduced a vulnerability that allows CIDR-based ACLs
    (such as 10.0.0.1/24) to be bypassed. The CIDR ACLs are disregarded,
    with the net effect being similar to an "AllowAll" directive.

    Impact
    ======

    This vulnerability may allow unauthorized files, including critical
    system files to be downloaded and/or modified, thereby allowing a
    potential remote compromise of the server.

    Workaround
    ==========

    Users may work around the problem by avoiding use of CIDR-based ACLs.

    Resolution
    ==========

    ProFTPD users are encouraged to upgrade to the latest version of the
    package:

        # emerge sync

        # emerge -pv ">=net-ftp/proftpd-1.2.9-r2"
        # emerge ">=net-ftp/proftpd-1.2.9-r2"

    References
    ==========

      [ 1 ] CAN-2004-0432
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0432

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

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

         http://security.gentoo.org/glsa/glsa-200405-09.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 2004 Gentoo Technologies, 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/1.0

    _______________________________________________
    Full-Disclosure - We believe in it.
    Charter: http://lists.netsys.com/full-disclosure-charter.html

  • Next message: Curt Sampson: "[Full-Disclosure] Re: Buffer Overflow in ActivePerl ?"

    Relevant Pages