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______________________________________________________________________________



                        SuSE Security Announcement



        Package:                knfsd, all versions

        Date:                   Thursday, August 10th, 2000

        Affected SuSE versions: 6.1-6.4

        Vulnerability Type:     remote root compromise

        Severity (1-10):        9

        SuSE default package:   yes

        Other affected systems: all linux systems using this package



    Content of this advisory:

        1) security vulnerability resolved: knfsd (remote root compromise)

           problem description, discussion, solution and upgrade information

        2) pending vulnerabilities, temporary workarounds

           (Netscape, suidperl)

        3) standard appendix (further information)





______________________________________________________________________________



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



    Due to incorrect string parsing in the code, a remote attacker could

    gain root priviledges on the machine running the vulnerable rpc.kstatd.



    The rpc.kstatd daemon contained in the package linuxnfs (SuSE-6.1, 6.2)

    or knfsd (SuSE-6.3, 6.4) is used by the NFS file locking service to

    implement lock recovery when the NFS server crashes or reboots.

    The network status monitor as shipped with SuSE distributions including

    and following SuSE-6.1 is called `rpc.kstatd' in order not to confuse 

    it with the `rpc.rstatd', the kernel statistics server that comes with

    SuSE, too (See manual pages for rpc.kstatd and rpc.rstatd). Other 

    distributors might use the term `rpc.statd'.

    Note: The upcoming SuSE-7.0 distribution is _not_ vulnerable to the

          problem with rpc.kstatd.



    SuSE provides updated packages for the vulnerable software. It is

    strongly recommended to upgrade to the latest version found on our

    ftp server as described below. 

    For the kernel-based NFS server to operate properly, it is strongly

    recommended to upgrade to the latest kernel version as announced in

    http://www.suse.de/de/support/security/suse_security_announce_54.txt .



    Chose one of the following paths to download the package from our 

    ftp server and install the package with the command `rpm -Fhv file.rpm'.

    The md5sum for each file is in the line below.

    You can verify the integrity of the rpm files using the command

        `rpm --checksig --nogpg file.rpm', independently from the md5 

    signatures below.



    i386 Intel Platform:

      SuSE-6.4 (package name is knfsd!):

      http://ftp.suse.com/pub/suse/i386/update/6.4/n1/knfsd.rpm

        1a7214f921ebeea7bbcfce8187e7ba65

      source rpm:

      http://ftp.suse.com/pub/suse/i386/update/6.4/zq1/knfsd.spm

        fa4bb28382515648f1c667cbbc019695



      SuSE-6.3 (package name is knfsd!):

      http://ftp.suse.com/pub/suse/i386/update/6.3/n1/knfsd.rpm

        9425557d97676df139c3b3cfbcbfb686

      source rpm:

      http://ftp.suse.com/pub/suse/i386/update/6.3/zq1/knfsd.spm

        1d4f69b00eedee3530cbd14ede55b985



      SuSE-6.2 (package name is linuxnfs!):

      http://ftp.suse.com/pub/suse/i386/update/6.2/n1/linuxnfs.rpm

        c4fbbcbdac7c8640b8ff92643e666ea2

      source rpm:

      http://ftp.suse.com/pub/suse/i386/update/6.2/zq1/linuxnfs.spm

        7a006bcc0a8132e8a35e43c087edd493



      SuSE-6.1 (package name is linuxnfs!):

      http://ftp.suse.com/pub/suse/i386/update/6.1/n1/linuxnfs.rpm

        e4ae4db716613a94d7f5a2acc5f4ee05

      source rpm:

      http://ftp.suse.com/pub/suse/i386/update/6.1/zq1/linuxnfs.spm

        879318dd2985fc29d879691044ccc982



    AXP Alpha Platform:

      SuSE-6.4 (package name is knfsd!):

      http://ftp.suse.com/pub/suse/axp/update/6.4/n1/knfsd.rpm

        6596ee4207f3f03b570a872af714a263

      source rpm:

      http://ftp.suse.com/pub/suse/axp/update/6.4/zq1/knfsd.spm

        14d8c202a1d136e7d88ae02e428925a1

      SuSE-6.3 (package name is knfsd!):

      http://ftp.suse.com/pub/suse/axp/update/6.3/n1/knfsd.rpm

        728896064200e3fe2e303eba3246a295

      source rpm:

      http://ftp.suse.com/pub/suse/axp/update/6.3/zq1/knfsd.spm

        6e755c651af95c4f8fd05138a373e8f3

      SuSE-6.1 (package name is linuxnfs!):

      http://ftp.suse.com/pub/suse/axp/update/6.1/n1/linuxnfs.rpm

        589a11bd867608cb00c93f4b91ba6dce

      source rpm:

      http://ftp.suse.com/pub/suse/axp/update/6.1/zq1/linuxnfs.spm

        8196c617e9585a4906407bf666055508



    PPC Power PC Platform:

      SuSE-6.4 (package name is knfsd!):

      http://ftp.suse.com/pub/suse/ppc/update/6.4/n1/knfsd.rpm

        52d64f1104530dac74ab03c508aa2ff4

      source rpm:

      http://ftp.suse.com/pub/suse/ppc/update/6.4/zq1/knfsd.spm

        5cdff95c21484fe01552a0ed80252adc



______________________________________________________________________________



2)  Pending vulnerabilities in SuSE Distributions and Workarounds



    This section addresses currently known vulnerabilities in Linux/Unix

    systems that have not been resolved up to the release date of this

    advisory.



    - Netscape, versions from 3.0 to 4.73:



        The latest version of Netscape is currently being tested. SuSE 

        Netscape rpms contain efficient workarounds against some "morbid"

        properties of Netscape in order to provide stable packages.

        These additions are being reworked right now. 

        Also, cryprographical software export regulations require us to 

        wait for the permission to redistribute the netscape package from 

        our US-American ftp server. 

        There are currently two known vulnerabilities in Netscape versions

        from 3.0 to 4.73:

            a) a buffer overflow in the jpeg image handling code

            b) a security flaw in Netscape's Java implementation

        a) has been fixed in Netscape version 4.74. Updated packages 

        from SuSE will follow soon.

        Temporary fix/workaround:

            problem a) Turn off automatic image loading and do not

                       click on images to trigger the download.

            problem b) Turn off Java and JavaScript.





    - suidperl



        The /usr/bin/suidperl perl interpreter in the SuSE Distributions

        has file permissions 755 by default. If the admin of a SuSE Linux 

        system did not change the permission modes and/or the respective 

        entry in /etc/permissions*, the SuSE Linux system is not vulnerable

        to the attack as published on bugtraq.

        An advisory announcing updated suidperl packages follows this 

        announcement on the way to the mailing lists. Further details will

        be discussed therein.

        Temporary fix/workaround:

            chmod -s /usr/bin/suidperl # this is the default.





______________________________________________________________________________



3)  standard appendix:



    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-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

                .



    For general information or the frequently asked questions (faq) 

    send mail to:

         or

         respectively.



    ===============================================

    SuSE's security contact is .

    ===============================================





Regards,

Roman Drahtmüller.

- -- 

 -                                                                      -

| Roman Drahtmüller       //          "Caution: Cape does |

  SuSE GmbH - Security           Phone: //       not enable user to fly."

| Nürnberg, Germany     +49-911-740530 // (Batman Costume warning label) |

 -                                                                      -

______________________________________________________________________________



    The information in this advisory may be distributed or reproduced,

    provided that the advisory is not modified in any way.

    SuSE GmbH makes no warranties of any kind whatsoever with respect 

    to the information contained in this security advisory.





Type Bits/KeyID    Date       User ID

pub  2048/3D25D3D9 1999/03/06 SuSE Security Team 



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