SUSE Security Announcement: mc (SuSE-SA:2004:012)

14 May 2004


      -----BEGIN PGP SIGNED MESSAGE-----

______________________________________________________________________________

                        SUSE Security Announcement

        Package:                mc
        Announcement-ID:        SuSE-SA:2004:012
        Date:                   Friday, May 14th 2004 16:00 MEST
        Affected products:      8.0, 8.1, 8.2, 9.0, 9.1
                                SuSE Linux Database Server,
                                SuSE eMail Server III, 3.1
                                SuSE Linux Enterprise Server 7, 8
                                SuSE Linux Firewall on CD/Admin host
                                SuSE Linux Connectivity Server
                                SuSE Linux Office Server
        Vulnerability Type:     local privilege escalation
        Severity (1-10):        3
        SUSE default package:   yes
        Cross References:       CAN-2004-0226
                                CAN-2004-0231
                                CAN-2004-0232

    Content of this advisory:
        1) security vulnerability resolved:
             - buffer overflows
             - tmp file problems
             - format string bugs
           problem description, discussion, solution and upgrade information
        2) pending vulnerabilities, solutions, workarounds:
             - sharutils
             - apache2*
             - xine*
             - sysconfig
             - clamav
             - exim
             - utempter
             - busybox
             - monit
             - ethereal
             - kphone
        3) standard appendix (further information)

______________________________________________________________________________

1)  problem description, brief discussion, solution, upgrade information

    The Midnight Commander (mc) is a file manager for the console.
    The mc code is vulnerable to several security related bugs like buffer
    overflows, incorrect format string handling and insecure usage of
    temporary files.
    These bugs can be exploited by local users to gain access to the
    privileges of the user running mc.

    There is no workaround known other then avoid using mc.

    Please download the update package for your distribution and verify its
    integrity by the methods listed in section 3) of this announcement.
    Then, install the package using the command "rpm -Fhv file.rpm" to apply
    the update.
    Our maintenance customers are being notified individually. The packages
    are being offered to install from the maintenance web.


    Intel i386 Platform:

    SuSE-9.0:
    ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/mc-4.6.0-327.i586.rpm
      c5ad0c60348bc462db2d71735247ee1d
    patch rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/mc-4.6.0-327.i586.patch.rpm
      850b02c3908588ae83afd5027add43ec
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/src/mc-4.6.0-327.src.rpm
      71c511d7bfbf7cc285aed54e164e4077

    SuSE-8.2:
    ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/mc-4.6.0-327.i586.rpm
      c12550eca593946915b2bf39759e78d1
    patch rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/mc-4.6.0-327.i586.patch.rpm
      8879832d99052ac11fc40423027f4bb4
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/src/mc-4.6.0-327.src.rpm
      585c3678406be16171b26ceaeb5600c7

    SuSE-8.1:
    ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/mc-4.5.55-758.i586.rpm
      4fa2bd194e823ef8dce8b0ee4a7d5707
    patch rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/mc-4.5.55-758.i586.patch.rpm
      b22258254be06b2493d1ea39a5b97b00
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/mc-4.5.55-758.src.rpm
      860f9fc3b3825031b8d7c10fbf793fcd

    SuSE-8.0:
    ftp://ftp.suse.com/pub/suse/i386/update/8.0/ap1/mc-4.5.55-758.i386.rpm
      bdf10b7c25fdececa1f369b0baeaa764
    patch rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.0/ap1/mc-4.5.55-758.i386.patch.rpm
      7e3c66bb6f257688f858424f164e360d
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/mc-4.5.55-758.src.rpm
      46dd268a6e2f7c7596ed45fd9ab03c88

______________________________________________________________________________

2)  Pending vulnerabilities in SUSE Distributions and Workarounds:

  - sharutils
  This update fixes a buffer overflow in shar while handling the '-o'
  commandline option. The buffer overflow can be abused to execute
  commands remotely in conjunction with other systems (CGI, ...).
  New packages are available on our FTP servers.

  - apache2/-devel/-doc/-example-pages/-prefork/-perchild/-worker,
    apr, libapr0
  These updates fix a memory leak in the mod_ssl module of apache2
  (CAN-2004-0113), a possible remote DoS attack on accessing rarely used
  listening ports (CAN-2004-0174), and a problem with unescaped special
  characters in log files that could present a security hazard for terminal
  emulators (CAN-2003-0020).
  New packages are available on our FTP servers.

  - xine, xine-lib, xine-ui
  A buffer overflow exists in the xine library. Attackers could execute
  arbitrary code as the user utilizing the xine library. More information
  can be found on http://www.xinehq.de/index.php/security/XSA-2004-3.
  New packages are available on our FTP servers.

  - sysconfig
  This update fix the restart of the firewall after a dialup connection is
  established. Without this restart, all ports are closed on the dialup
  interface and the connection seems to be not working.
  This bug affects SUSE LINUX 9.1 only.
  New packages are available on our FTP servers.

  - clamav
  The ClamAV project recently changed the format of their virus
  definition database files to support detection of new sorts of
  viruses. This update is needed to make use of the files in the new
  format.
  New packages are available on our FTP servers.

  - exim
  The exim mailer contains a buffer overflow in its header parsing
  functions which may allow remote attackers to execute arbitrary code.
  Only installations with the "verify=header_syntax" config option enabled
  are vulnerable to this attack. SUSE Linux is not configured that
  way by default. CAN-2004-0400 has been assigned to this bug.
  New packages are available on our FTP servers.

  - utempter
  This updates addresses a possible symlink attack while using
  tty device files. This bug may lead to a local root compromise.
  New packages are available on our FTP servers.

  - busybox
  Busybox does not handle netlink sockets correctly, which allows
  local attackers to spoof netlink messages to the busybox process
  New packages are available on our FTP servers.

  - monit
  There exists security vulnerabilities in the monit HTTP interface,
  which could allow an attacker in the worst case to gain root access to
  the system.  This issue only affects monit if monit is started with
  http server support.
  See http://www.tildeslash.com/monit/secadv_20040305.txt for details.
  New packages are available on our FTP servers.

  - ethereal
  Several buffer overflows in the ethereal code were fixed.
  These buffer overflows can be used to gain remote access to a system
  where ethereal is running on. (CAN-2004-0176, CAN-2004-0367, CAN-2004-036)
  New packages are available on our FTP servers.

  - kphone
  The kphone update fixes a possible denial-of-service attack in SIP client
  code.
  New packages are available on our FTP servers.

______________________________________________________________________________

3)  standard appendix: authenticity verification, additional information

  - Package authenticity verification:

    SUSE update packages are available on many mirror ftp servers all over
    the world. While this service is being considered valuable and important
    to the free and open source software community, many users wish to be
    sure about the origin of the package and its content before installing
    the package. There are two verification methods that can be used
    independently from each other to prove the authenticity of a downloaded
    file or rpm package:
    1) md5sums as provided in the (cryptographically signed) announcement.
    2) using the internal gpg signatures of the rpm package.

    1) execute the command
        md5sum <name-of-the-file.rpm>
       after you downloaded the file from a SUSE ftp server or its mirrors.
       Then, compare the resulting md5sum with the one that is listed in the
       announcement. Since the announcement containing the checksums is
       cryptographically signed (usually using the key security@suse.de),
       the checksums show proof of the authenticity of the package.
       We disrecommend to subscribe to security lists which cause the
       email message containing the announcement to be modified so that
       the signature does not match after transport through the mailing
       list software.
       Downsides: You must be able to verify the authenticity of the
       announcement in the first place. If RPM packages are being rebuilt
       and a new version of a package is published on the ftp server, all 
       md5 sums for the files are useless.

    2) rpm package signatures provide an easy way to verify the authenticity
       of an rpm package. Use the command
        rpm -v --checksig <file.rpm>
       to verify the signature of the package, where <file.rpm> is the
       filename of the rpm package that you have downloaded. Of course, 
       package authenticity verification can only target an un-installed rpm
       package file.
       Prerequisites:
        a) gpg is installed
        b) The package is signed using a certain key. The public part of this
           key must be installed by the gpg program in the directory 
           ~/.gnupg/ under the user's home directory who performs the
           signature verification (usually root). You can import the key
           that is used by SUSE in rpm packages for SUSE Linux by saving
           this announcement to a file ("announcement.txt") and
           running the command (do "su -" to be root):
            gpg --batch; gpg < announcement.txt | gpg --import
           SUSE Linux distributions version 7.1 and thereafter install the
           key "build@suse.de" upon installation or upgrade, provided that
           the package gpg is installed. The file containing the public key
           is placed at the top-level directory of the first CD (pubring.gpg)
           and at ftp://ftp.suse.com/pub/suse/pubring.gpg-build.suse.de .


  - SUSE runs two security mailing lists to which any interested party may
    subscribe:

    suse-security@suse.com
        -   general/linux/SUSE security discussion. 
            All SUSE security announcements are sent to this list.
            To subscribe, send an email to 
                <suse-security-subscribe@suse.com>.

    suse-security-announce@suse.com
        -   SUSE's announce-only mailing list.
            Only SUSE's security announcements are sent to this list.
            To subscribe, send an email to
                <suse-security-announce-subscribe@suse.com>.

    For general information or the frequently asked questions (faq) 
    send mail to:
        <suse-security-info@suse.com> or
        <suse-security-faq@suse.com> respectively.

    =====================================================================
    SUSE's security contact is <security@suse.com> or <security@suse.de>.
    The <security@suse.de> public key is listed below.
    =====================================================================
______________________________________________________________________________

    The information in this advisory may be distributed or reproduced,
    provided that the advisory is not modified in any way. In particular,
    it is desired that the clear-text signature shows proof of the
    authenticity of the text.
    SUSE Linux AG makes no warranties of any kind whatsoever with respect
    to the information contained in this security advisory.

Type Bits/KeyID    Date       User ID
pub  2048R/3D25D3D9 1999-03-06 SuSE Security Team <security@suse.de>
pub  1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <build@suse.de>

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Bye,
     Thomas
-- 
 Thomas Biege <thomas@suse.de>, SUSE LINUX AG, Security Support & Auditing
-- 
	finding beauty in the dissonance
 			- Maynard James Keenan

Thomas Biege

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