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TUCoPS :: Linux :: SUSE :: bt369.txt

pptpd - remote code exec (SuSE-SA:2003:029)






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

______________________________________________________________________________

                        SuSE Security Announcement

        Package:                pptpd
        Announcement-ID:        SuSE-SA:2003:029
        Date:                   Fri Jun  6 16:30:00 MEST 2003
        Affected products:      7.2, 7.3, 8.0, 8.1, 8.2
                                SuSE Linux Database Server
                                SuSE eMail Server III, 3.1
                                SuSE Linux Connectivity Server
                                SuSE Linux Enterprise Server 7
                                SuSE Linux Enterprise Server 8
                                SuSE Linux Office Server
                                UnitedLinux 1.0
        Vulnerability Type:     remote code execution
        Severity (1-10):        5
        SuSE default package:   Yes
        Cross References:       -

    Content of this advisory:
        1) security vulnerability resolved: Remote code execution due to
           an integer overflow.
           problem description, discussion, solution and upgrade information
        2) pending vulnerabilities, solutions, workarounds:
            - snort

        3) standard appendix (further information)

______________________________________________________________________________

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

    The PPTP daemon contains a remotely exploitable buffer overflow which
    was introduced due to a integer overflow in the third argument passed
    to the read() library call. This bug has been fixed.
      Since there is no workaround other than shutting down the PPTP daemon
    an update is strongly recommended if you need a PPTP server running.

    To be sure the update takes effect you have to restart the PPTP daemon
    by executing the following command as root:

        "rcpptpd restart"

    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-8.2:
    ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/pptpd-1.1.2-418.i586.rpm
      5caa610c56180b7597886cd919362fb3
    patch rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/pptpd-1.1.2-418.i586.patch.rpm
      d28db868016ac2ce61fd7234a47d1502
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/src/pptpd-1.1.2-418.src.rpm
      d69f971343f9d1cb5eef5f57ce16fffa

    SuSE-8.1:
    ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/pptpd-1.1.2-413.i586.rpm
      be9e2f5a26fcf3f95bf9ffcc206e926c
    patch rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/pptpd-1.1.2-413.i586.patch.rpm
      448c505376cce08bdfa2e6b46f333db7
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/pptpd-1.1.2-413.src.rpm
      067bd6274148e41b65d00e46674994a7

    SuSE-8.0:
    ftp://ftp.suse.com/pub/suse/i386/update/8.0/n4/pptpd-1.1.2-412.i386.rpm
      60f1550b7f19cb9a6184dc60d43da431
    patch rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.0/n4/pptpd-1.1.2-412.i386.patch.rpm
      870a38bd3256b196779e8e1e52cf2e5f
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/pptpd-1.1.2-412.src.rpm
      78985af877c69ca16ee0ca652548aa79

    SuSE-7.3:
    ftp://ftp.suse.com/pub/suse/i386/update/7.3/n3/pptpd-1.1.2-412.i386.rpm
      598676ca6ba8fad2cc79ca722a2387c4
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/pptpd-1.1.2-412.src.rpm
      c5871ca7d894338530db9fc2882744c0

    SuSE-7.2:
    ftp://ftp.suse.com/pub/suse/i386/update/7.2/n3/pptpd-1.1.2-411.i386.rpm
      89bd9ceacaad198b9436f6fc95433f04
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/pptpd-1.1.2-411.src.rpm
      96541c1e7ef7dfa6ce82ea4d3455e601


    Sparc Platform:

    SuSE-7.3:
    ftp://ftp.suse.com/pub/suse/sparc/update/7.3/n3/pptpd-1.1.2-132.sparc.rpm
      5a868893c50a332b46fb50efd426db44
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/pptpd-1.1.2-132.src.rpm
      5654f0e078319165beee722d8250625d


    PPC Power PC Platform:

    SuSE-7.3:
    ftp://ftp.suse.com/pub/suse/ppc/update/7.3/n3/pptpd-1.1.2-262.ppc.rpm
      6b8826e29930cfa077cfc6db18fd07f1
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/pptpd-1.1.2-262.src.rpm
      55208931a1240ca324fbefb155976bd6


______________________________________________________________________________

2)  Pending vulnerabilities in SuSE Distributions and Workarounds:

    - snort
    A overflow in the stream4 preprocessor has been fixed in the new snort
    packages which will be available soon on our ftp servers.

______________________________________________________________________________

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 un-installed 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 top-level 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 announcements 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 clear-text 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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-- 
~
~ perl self.pl
~ $_='print"\$_=\47$_\47;eval"';eval
~ krahmer@suse.de - SuSE Security Team
~


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