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

______________________________________________________________________________ 

                        SuSE Security Announcement 

        Package: lukemftp, nkitb, nkitserv 
        Announcement-ID: SuSE-SA:2002:018 
        Date: Wednesday, May 15th 2002 12:30 MEST 
        Affected products: 6.4, 7.0, 7.1, 7.2, 7.3, 8.0 
                                SuSE eMail Server III 
                                SuSE Linux Database Server 
                                SuSE Firewall Adminhost VPN 
                                SuSE Linux Live-CD for Firewall 
                                SuSE Linux Admin-CD for Firewall 
                                SuSE Linux Connectivity Server 
                                SuSE Linux Enterprise Server 7 
                                SuSE Linux Enterprise Server for S/390 
        Vulnerability Type: remote command execution 
        Severity (1-10): 3 
        SuSE default package: yes 
        Other affected systems: all systems using lukemftp 

    Content of this advisory: 
        1) security vulnerability resolved: buffer overflow while parsing PASV 
                                            command 
           problem description, discussion, solution and upgrade information 
        2) pending vulnerabilities, solutions, workarounds 
        3) standard appendix (further information) 

______________________________________________________________________________ 

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

    Lukemftp (ftp(1), /usr/bin/ftp, /usr/bin/pftp) is a compfortable ftp 
    client from NetBSD. 
    A buffer overflow could be triggered by an malicious ftp server while the 
    client parses the PASV ftp command. An attacker who control an ftp server 
    to which a client using lukemftp is connected can gain remote access to 
    the clients machine with the privileges of the user running lukeftp. 

    The lukemftp RPM package is installed by default. 
    You need to update the package, as no temporary workaround is possbible. 

    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. 

    i386 Intel Platform: 

    SuSE-8.0 
      ftp://ftp.suse.com/pub/suse/i386/update/8.0/n1/lukemftp-1.5-249.i386.rpm 
      0ae28f7ca49157bfa5783626d3e82cef 
    source rpm: 
      ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/lukemftp-1.5-249.src.rpm 
      d9fc530c338ea2de122b6a4a1f89a627 

    SuSE-7.3 
      ftp://ftp.suse.com/pub/suse/i386/update/7.3/n1/lukemftp-1.5-256.i386.rpm 
      aeb64a5ba64b5b334dfcf244423a9809 
    source rpm: 
      ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/lukemftp-1.5-256.src.rpm 
      cc94b939696c76cda0fec683d12ff384 

    SuSE-7.2 
      ftp://ftp.suse.com/pub/suse/i386/update/7.2/n1/lukemftp-1.5-256.i386.rpm 
      94812aeb3b164a67b0c85b0c9a61a450 
    source rpm: 
      ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/lukemftp-1.5-256.src.rpm 
    5cd6642505a68be70ce9eac3ba5dd311 

    SuSE-7.1 
      ftp://ftp.suse.com/pub/suse/i386/update/7.1/n1/lukemftp-1.5-251.i386.rpm 
      836df6046ce81fcc82e9939fde5003d1 
    source rpm: 
      ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/lukemftp-1.5-251.src.rpm 
      788bc38fed7b486e857b5d780451b7a7 

    SuSE-7.0 
      ftp://ftp.suse.com/pub/suse/i386/update/7.0/a1/nkitb-2002.5.8-0.i386.rpm 
      e6199c28c700461a7ae10c3f7fba73a8 
    source rpm: 
      ftp://ftp.suse.com/pub/suse/i386/update/7.0/zq1/nkitb-2002.5.8-0.src.rpm 
      e1c6379846842ea62a5c484167102cae 

    SuSE-7.0 
      ftp://ftp.suse.com/pub/suse/i386/update/7.0/n1/nkitserv-2002.5.8-0.i386.rpm 
      50bb6a7ae3f450ad530ad92ae8dad3e1 

    SuSE-6.4 
      ftp://ftp.suse.com/pub/suse/i386/update/6.4/a1/nkitb-2002.5.9-0.i386.rpm 
      6950a272cf3a30a02860cf179387a9e8 
    source rpm: 
      ftp://ftp.suse.com/pub/suse/i386/update/6.4/zq1/nkitb-2002.5.9-0.src.rpm 
      09d7ac9ba5e1420eeddb016a6d812067 

    Sparc Platform: 

    SuSE-7.3 
      ftp://ftp.suse.com/pub/suse/sparc/update/7.3/n1/lukemftp-1.5-77.sparc.rpm 
      295d90e7bfeb94f27f542616e016bd65 
    source rpm: 
      ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/lukemftp-1.5-77.src.rpm 
    42e213cfc930e0a00aa871e9996d3cba 

    SuSE-7.1 
      ftp://ftp.suse.com/pub/suse/sparc/update/7.1/n1/lukemftp-1.5-76.sparc.rpm 
      50fc0f99b42347aee746450624ed4817 
    source rpm: 
      ftp://ftp.suse.com/pub/suse/sparc/update/7.1/zq1/lukemftp-1.5-76.src.rpm 
      01cdff7ff9f908466b8d3269fe4529c5 

    SuSE-7.0 
      ftp://ftp.suse.com/pub/suse/sparc/update/7.0/a1/nkitb-2002.5.8-0.sparc.rpm 
      210230a1a085af9f777f047a9edfa9f5 
    source rpm: 
      ftp://ftp.suse.com/pub/suse/sparc/update/7.0/zq1/nkitb-2002.5.8-0.src.rpm 
      b0e476e5ba4e9211cab20442f35b49d8 

    SuSE-7.0 
      ftp://ftp.suse.com/pub/suse/sparc/update/7.0/n1/nkitserv-2002.5.8-0.sparc.rpm 
      70b063b1901c8655a23b008cc6ef4036 

    AXP Alpha Platform: 

    SuSE-7.1 
      ftp://ftp.suse.com/pub/suse/axp/update/7.1/n1/lukemftp-1.5-89.alpha.rpm 
      27c6ca255ef42c7e6851f309d6474fcd 
    source rpm: 
      ftp://ftp.suse.com/pub/suse/axp/update/7.1/zq1/lukemftp-1.5-89.src.rpm 
      fdc27d3abae5bf6dfcd06907d2afc278 

    SuSE-7.0 
      ftp://ftp.suse.com/pub/suse/axp/update/7.0/a1/nkitb-2002.5.8-0.alpha.rpm 
      2c397f234a2326baba98a4da8dff601a 
    source rpm: 
      ftp://ftp.suse.com/pub/suse/axp/update/7.0/zq1/nkitb-2002.5.8-0.src.rpm 
      437a49653372205c4218e7283422fd6b 

    SuSE-7.0 
      ftp://ftp.suse.com/pub/suse/axp/update/7.0/n1/nkitserv-2002.5.8-0.alpha.rpm 
      e2943d09b3bf82883bfd62aff74e500b 

    SuSE-6.4 
      ftp://ftp.suse.com/pub/suse/axp/update/6.4/a1/nkitb-2002.5.9-0.alpha.rpm 
      33b7a7b2f81dc78035450c0643786c83 
    source rpm: 
      ftp://ftp.suse.com/pub/suse/axp/update/6.4/zq1/nkitb-2002.5.9-0.src.rpm 
      60960a0129207b317fc22089f6203589 

    PPC Power PC Platform: 

    SuSE-7.3 
      ftp://ftp.suse.com/pub/suse/ppc/update/7.3/n1/lukemftp-1.5-154.ppc.rpm 
      fd6bc23e95cd7a19283dd4067f376bb3 
    source rpm: 
      ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/lukemftp-1.5-154.src.rpm 
      bb301c6487a09a2b3d82ce9b000b8f69 

    SuSE-7.1 
      ftp://ftp.suse.com/pub/suse/ppc/update/7.1/n1/lukemftp-1.5-150.ppc.rpm 
      023a43cba32d976d0a5665365242647b 
    source rpm: 
      ftp://ftp.suse.com/pub/suse/ppc/update/7.1/zq1/lukemftp-1.5-150.src.rpm 
      53f38c8f4a3205b3bedbc76b209d177b 

    SuSE-7.0 
      ftp://ftp.suse.com/pub/suse/ppc/update/7.0/a1/nkitb-2002.5.8-0.ppc.rpm 
      101d5af039c262f7b7e7d50598fa064c 
    source rpm: 
      ftp://ftp.suse.com/pub/suse/ppc/update/7.0/zq1/nkitb-2002.5.8-0.src.rpm 
      ed39244bcb57fad7b92287f5c9d26e3d 

    SuSE-7.0 
      ftp://ftp.suse.com/pub/suse/ppc/update/7.0/n1/nkitserv-2002.5.8-0.ppc.rpm 
      b6146585ab16d1d507e04f066f21f5d6 

    SuSE-6.4 
      ftp://ftp.suse.com/pub/suse/ppc/update/6.4/a1/nkitb-2002.5.9-0.ppc.rpm 
      10b66b58b887a1899df7e16b15689bfb 
    source rpm: 
      ftp://ftp.suse.com/pub/suse/ppc/update/6.4/zq1/nkitb-2002.5.9-0.src.rpm 
      954dcd26ef2eb777e737621927f98835 

______________________________________________________________________________ 

2) Pending vulnerabilities in SuSE Distributions and Workarounds: 

  - imap 
    A bug report about a buffer overflow in the RFC1730 code of the wu-imap 
    eMail server was published. SuSE Linux' imap packages were compiled 
    without RFC1730 support, so SuSE Linux is not vulnerable to this bug per 
    default. 

  - dhcp 
    A format string bug was found in the DynamicDNS (DDNS) code of ISC's 
    DHCP server software. New RPMs are currently being build. 

  - imlib 
    Due to packaging failures we have to re-release the imlib packages 
    which should be available within the next days. This update addresses 
    missing dependencies and affects applications like xcdroast. 

  - perl-Digest-MD5 
    A bug was found in the UTF8 interaction between perl and perl-Digest-MD5 
    which leads into failures while verifying the MD5 hash. 
    New RPMs are currently being build. 

______________________________________________________________________________ 

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 uninstalled 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 toplevel 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 annoucements 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 cleartext 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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