SuSE alert: xntp

Posted by dave on Apr 9, 2001 12:36 PM EDT
Mailing list
Mail this story
Print this story

xntp is the network time protocol package widely used with many unix and linux systems for system time synchronization over a network. An exploit published by Przemyslaw Frasunek demonstrates a buffer overflow in the control request parsing code. The exploit allows a remote attacker to execute arbitrary commands as root. All versions as shipped with SuSE Linux are affected by the buffer overflow problem.

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

______________________________________________________________________________

                        SuSE Security Announcement

        Package: xntp
        Announcement-ID: SuSE-SA:2001:10
        Date: Monday, April 9th 22:30 MEST
        Affected SuSE versions: (6.0, 6.1, 6.2), 6.3, 6.4, 7.0, 7.1
        Vulnerability Type: remote root compromise
        Severity (1-10): 8
        SuSE default package: no
        Other affected systems: systems using xntp in newer versions

    Content of this advisory:
        1) security vulnerability resolved: xntp
           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

    xntp is the network time protocol package widely used with many unix
    and linux systems for system time synchronization over a network.
    An exploit published by Przemyslaw Frasunek demonstrates a buffer
    overflow in the control request parsing code. The exploit allows a
    remote attacker to execute arbitrary commands as root. All versions as
    shipped with SuSE Linux are affected by the buffer overflow problem.

    A temporary workaround is to kill the daemon and to set the variable
    START_XNTPD in the file /etc/rc.config to "no" so that the daemon
    will not be started again upon reboot of the system. Correct the system
    time manually if necessary or adjust the time by running ntpdate from
    a cron job on a regular basis.

    We believe that this problem is generally underestimated since the
    xntpd daemon tends to get forgotten over the years of a system's life-
    time once installed and configured. The xntpd daemon is not started by
    default in SuSE Linux distributions. We strongly recommend to immediately
    update the xntp package on each system where the daemon is installed,
    configured and running.

    Note:
    The xntp update packages for most distributions have been available
    for download since Friday last week. The packages for all 6.4 and 7.0
    version distributions had to be rebuilt due to a specfile bug that
    did not show up earlier and that caused a delay in building packages.
    This bug causes the rpm subsystem to complain about the release number
    of the package. Now that this bug is corrected, you might find yourself
    having installed a package where there is a newer version of the package
    on the ftp server. However, regardless of the package release number,
    all published packages fix the currently known security problems in the
    xntpd network time daemon.

    Note:
    The source rpm of xntp in newer distributions generates two packages:
    xntp.rpm and xntpdoc.rpm. It is not necessary to update the xntpdoc
    package which is why we do not provide the update packages on our ftp
    server. The xntpdoc package only contains the documentation for the
    xntp package and did not change in this updated package.

    Download the update package from locations desribed below and install
    the package with the command `rpm -Uhv 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.

    SPECIAL INSTALL INSTRUCTIONS:
    ==============================
    The xntpd daemon must be restarted for the new package to become
    active after the installation of the update rpm. You can do this
    by running the command
        kill -15 `pidof xntpd`
    as root. After performing the upgrade using the rpm command above,
    you can restart the xntpd:
        rcxntpd start
    You should now see the new daemon synchronizing in your syslogs,
    depending on where you configured the daemon to write its logs to.

    i386 Intel Platform:

    SuSE-7.1
    ftp://ftp.suse.com/pub/suse/i386/update/7.1/n2/xntp-4.0.99f-34.i386.rpm
      9e39ca8f7b01fef22766463b8295e25d
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/xntp-4.0.99f-34.src.rpm
      dfa51b46c92b917353f52e5d83863478

    SuSE-7.0
    ftp://ftp.suse.com/pub/suse/i386/update/7.0/n1/xntp-4.0.99f-37.i386.rpm
      4293ad8a3e084ec5d773bbcab8380c08
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/7.0/zq1/xntp-4.0.99f-37.src.rpm
      745b894dcb6a97caa36f97858a51e279

    SuSE-6.4
    ftp://ftp.suse.com/pub/suse/i386/update/6.4/n1/xntp-4.0.99f-38.i386.rpm
      8001ac19d0ee812be82b6b066b4313d5
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/6.4/zq1/xntp-4.0.99f-38.src.rpm
      7d56618cba3d768aa53246f39158987d

    SuSE-6.3
    ftp://ftp.suse.com/pub/suse/i386/update/6.3/n1/xntp-4.0.98d-1.i386.rpm
      2f5d7b43b167c6acf13f68b13b1b7989
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/6.3/zq1/xntp-4.0.98d-1.src.rpm
      11182e5e8c3769e6f9498ade9fcbe1fc

    SuSE-6.2 (unsupported platform)
    ftp://ftp.suse.com/pub/suse/i386/update/6.2/n1/xntp-4.0.93a-18.i386.rpm
      5b55d179e3d4a0c57513bed03013c1a9
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/6.2/zq1/xntp-4.0.93a-18.src.rpm
      dbb7c833ddc25b0bde406b4319d4106f

    SuSE-6.1 (unsupported platform)
    ftp://ftp.suse.com/pub/suse/i386/update/6.1/n1/xntp-4.0.92c-1.i386.rpm
      baa93b55a4eaa486968fa6285f04c865
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/6.1/zq1/xntp-4.0.92c-1.src.rpm
      06f0174e8934e3ce6f419284564a7c91

    Sparc Platform:

    SuSE-7.1
    The xntp packages for the SuSE-7.1 sparc distribution are currently
    pending for being built. They will be available on the ftp server
    as soon as they are built. The packages are gpg-signed using the key
    <build@suse.de> that should have been installed on your system upon
    system installation/upgrade. Use the command `rpm --checksig xntp.rpmĀ“
    to verify this signature once the packages are available for download.
    In the meanwhile, please use the temporary workaround as described above.

    SuSE-7.0
    ftp://ftp.suse.com/pub/suse/sparc/update/7.0/n1/xntp-4.0.99f-19.sparc.rpm
      bea9ea6a88ae68f27962d1b9ad866eac
    source rpm:
    ftp://ftp.suse.com/pub/suse/sparc/update/7.0/zq1/xntp-4.0.99f-19.src.rpm
      83243db2982126e1a6ba371ef6dcf59b

    AXP Alpha Platform:

    SuSE-7.0
    ftp://ftp.suse.com/pub/suse/axp/update/7.0/n1/xntp-4.0.99f-22.alpha.rpm
      e410a96c44f12ba3d51a4f1f3e056fcd
    source rpm:
    ftp://ftp.suse.com/pub/suse/axp/update/7.0/zq1/xntp-4.0.99f-22.src.rpm
      61ed8e66753868735cd14e94cb295718

    SuSE-6.4
    ftp://ftp.suse.com/pub/suse/axp/update/6.4/n1/xntp-4.0.99f-22.alpha.rpm
      9460bd3eaf5500c0184d9394b8b86627
    source rpm:
    ftp://ftp.suse.com/pub/suse/axp/update/6.4/zq1/xntp-4.0.99f-22.src.rpm
      5c62ef99f064b687047087562cfe54ca

    SuSE-6.3
    ftp://ftp.suse.com/pub/suse/axp/update/6.3/n1/xntp-4.0.98d-1.alpha.rpm
      ad8c8494f0aaa06a1690e4edcaa43904
    source rpm:
    ftp://ftp.suse.com/pub/suse/axp/update/6.3/zq1/xntp-4.0.98d-1.src.rpm
      743fe2aba27f1801ac5b14cff2f2edb6

    SuSE-6.1 (unsupported platform)
    ftp://ftp.suse.com/pub/suse/axp/update/6.1/n1/xntp-4.0.92c-40.alpha.rpm
      d400eeecb9bd0b4347f3fe58f7f90fee
    source rpm:
    ftp://ftp.suse.com/pub/suse/axp/update/6.1/zq1/xntp-4.0.92c-40.src.rpm
      e2d01c31542ebbf8c740b820a6372ad1

    PPC Power PC Platform:

    SuSE-7.1
    The xntp packages for the SuSE-7.1 ppc distribution are currently
    pending for being built. They will be available on the ftp server
    as soon as they are built. The packages are gpg-signed using the key
    <build@suse.de> that should have been installed on your system upon
    system installation/upgrade. Use the command `rpm --checksig xntp.rpmĀ“
    to verify this signature once the packages are available for download.
    In the meanwhile, please use the temporary workaround as described above.

    SuSE-7.0
    ftp://ftp.suse.com/pub/suse/ppc/update/7.0/n1/xntp-4.0.99f-21.ppc.rpm
      2d82e8f63df84cb409df7659437c1177
    source rpm:
    ftp://ftp.suse.com/pub/suse/ppc/update/7.0/zq1/xntp-4.0.99f-21.src.rpm
      a0bce6c36cf30da1aa587e03103a01f6

    SuSE-6.4
    ftp://ftp.suse.com/pub/suse/ppc/update/6.4/n1/xntp-4.0.99f-21.ppc.rpm
      fe9082268bdf53dddcaad075284f899b
    source rpm:
    ftp://ftp.suse.com/pub/suse/ppc/update/6.4/zq1/xntp-4.0.99f-21.src.rpm
      1940b97593e3e134487d294a721e350d

______________________________________________________________________________

2) Pending vulnerabilities in SuSE Distributions and Workarounds:

    - kernel
    Please expect security updates of the Linux kernel soon. To resolve all
    currently known security problems in the Linux kernel, update the kernel
    manually to version 2.2.19 or wait until the SuSE update rpm packages
    for the supported distributions 6.3, 6.4, 7.0 and 7.1 are ready to be
    used and available for download.

    - more updates
    In addition to the kernel update, please expect more packages to see
    security updates. Currently, this involves vim, mc and sudo.

    - bind8
    The update packages for the 7.0 sparc distribution is available.
    ftp://ftp.suse.com/pub/suse/sparc/update/7.0/n1/bind8-8.2.3-39.sparc.rpm
      c7e2a95bd4b90d03207ffc3a9880c36c
    source rpm:
    ftp://ftp.suse.com/pub/suse/sparc/update/7.0/zq1/bind8-8.2.3-39.src.rpm
      5d4d4b608f2a8a3e61f7dc6917254f4f
    The SuSE-7.1 sparc distribution was published after the bugs in bind8
    were corrected.
______________________________________________________________________________

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>.
    ===============================================

______________________________________________________________________________

    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>

- -----BEGIN PGP PUBLIC KEY BLOCK-----
Version: 2.6.3i
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=pIeS
- -----END PGP PUBLIC KEY BLOCK-----

-----BEGIN PGP SIGNATURE-----
Version: 2.6.3i
Charset: noconv

iQEVAwUBOtIdLXey5gA9JdPZAQGX0Af/RbqT5xox/JWc6gz7QGxA/TCKrLvk3rO3
RBesK0QJ/GqEWZh3CI81CyXCHZiyOkKzmUo5+BhX5NU4OnmuvVokofTk/cAQxh1M
6HzcUySvNrru79VwSuFE1nFGuyzWSDkKAAgD2/mP0fSporpinJTeVJm/JkXH3jau
sOq+eIzhi7grtnVgbIueGR8mGrAg8COLlCx7GjYLd+VQxeS+eOtT16sLY4gMDV43
RDzpRA5dWFh48KGkncA5/0Cuvs46LTmBkVDgyflgyG1h+dmrSlfXSvoLyo08lupy
ekFi4zg2H91Bb7SX0FFs456R42S02arJyld2/xm8IR9fkR18Ve12gg==
=6ds6
-----END PGP SIGNATURE-----



This archive was generated by hypermail 2.1.0 : Mon Jun 04 2001 - 18:25:16 PDT

  Nav
» Read more about: Story Type: Security; Groups: SUSE

« Return to the newswire homepage

This topic does not have any threads posted yet!

You cannot post until you login.