SUSE Linux Information for VU#970472

Network Time Protocol ([x]ntpd) daemon contains buffer overflow in ntp_control:ctl_getitem() function

Status

Affected

Vendor Statement

No statement has been directly received from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Vendor References

None

Addendum

SuSE has released a Security Announcement on this issue: SuSE-SA:2001:10 at

http://lists.suse.com/archives/suse-security-announce/2001-Apr/0000.html

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______________________________________________________________________________

                        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.rpmī
   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.rpmī
   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>

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