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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!):
      ftp://ftp.suse.com/pub/suse/i386/update/6.4/n1/knfsd.rpm
        1a7214f921ebeea7bbcfce8187e7ba65
      source rpm:
      ftp://ftp.suse.com/pub/suse/i386/update/6.4/zq1/knfsd.spm
        fa4bb28382515648f1c667cbbc019695

      SuSE-6.3 (package name is knfsd!):
      ftp://ftp.suse.com/pub/suse/i386/update/6.3/n1/knfsd.rpm
        9425557d97676df139c3b3cfbcbfb686
      source rpm:
      ftp://ftp.suse.com/pub/suse/i386/update/6.3/zq1/knfsd.spm
        1d4f69b00eedee3530cbd14ede55b985

      SuSE-6.2 (package name is linuxnfs!):
      ftp://ftp.suse.com/pub/suse/i386/update/6.2/n1/linuxnfs.rpm
        c4fbbcbdac7c8640b8ff92643e666ea2
      source rpm:
      ftp://ftp.suse.com/pub/suse/i386/update/6.2/zq1/linuxnfs.spm
        7a006bcc0a8132e8a35e43c087edd493

      SuSE-6.1 (package name is linuxnfs!):
      ftp://ftp.suse.com/pub/suse/i386/update/6.1/n1/linuxnfs.rpm
        e4ae4db716613a94d7f5a2acc5f4ee05
      source rpm:
      ftp://ftp.suse.com/pub/suse/i386/update/6.1/zq1/linuxnfs.spm
        879318dd2985fc29d879691044ccc982

    AXP Alpha Platform:
      SuSE-6.4 (package name is knfsd!):
      ftp://ftp.suse.com/pub/suse/axp/update/6.4/n1/knfsd.rpm
        6596ee4207f3f03b570a872af714a263
      source rpm:
      ftp://ftp.suse.com/pub/suse/axp/update/6.4/zq1/knfsd.spm
        14d8c202a1d136e7d88ae02e428925a1
      SuSE-6.3 (package name is knfsd!):
      ftp://ftp.suse.com/pub/suse/axp/update/6.3/n1/knfsd.rpm
        728896064200e3fe2e303eba3246a295
      source rpm:
      ftp://ftp.suse.com/pub/suse/axp/update/6.3/zq1/knfsd.spm
        6e755c651af95c4f8fd05138a373e8f3
      SuSE-6.1 (package name is linuxnfs!):
      ftp://ftp.suse.com/pub/suse/axp/update/6.1/n1/linuxnfs.rpm
        589a11bd867608cb00c93f4b91ba6dce
      source rpm:
      ftp://ftp.suse.com/pub/suse/axp/update/6.1/zq1/linuxnfs.spm
        8196c617e9585a4906407bf666055508

    PPC Power PC Platform:
      SuSE-6.4 (package name is knfsd!):
      ftp://ftp.suse.com/pub/suse/ppc/update/6.4/n1/knfsd.rpm
        52d64f1104530dac74ab03c508aa2ff4
      source rpm:
      ftp://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-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>.
    ===============================================


Regards,
Roman Drahtmüller.
- -- 
 -                                                                      -
| Roman Drahtmüller      <draht@suse.de> //          "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 <security@suse.de>

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