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Message-ID: <Pine.LNX.4.44.0309031754330.424-100000@wotan.suse.de>
Date: Wed, 3 Sep 2003 17:54:54 +0200 (CEST)
From: Thomas Biege <thomas@...e.de>
To: bugtraq@...urityfocus.com
Subject: SuSE Security Announcement: pam_smb (SuSE-SA:2003:036)


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

______________________________________________________________________________

                        SuSE Security Announcement

        Package:                pam_smb
        Announcement-ID:        SuSE-SA:2003:036
        Date:                   Wednesday, Sep 3nd 2003 16:40 MEST
        Affected products:      7.2, 7.3, 8.0, 8.1, 8.2
                                SuSE Linux Database Server,
                                SuSE eMail Server III, 3.1
                                SuSE Linux Enterprise Server 7, 8
                                SuSE Linux Firewall on CD/Admin host
                                SuSE Linux Connectivity Server
                                SuSE Linux Office Server
        Vulnerability Type:     remote privilege escalation
        Severity (1-10):        6
        SuSE default package:   no
        Cross References:

    Content of this advisory:
        1) security vulnerability resolved: buffer overflow
           problem description, discussion, solution and upgrade information
        2) pending vulnerabilities, solutions, workarounds:
            - gdm2
            - whois
            - node
            - postgresql
            - gkrellm
        3) standard appendix (further information)

______________________________________________________________________________

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

    The PAM module (and server) pam_smb allows users of Linux systems to
    be authenticated by querying an NT server.
    Dave Airlie <airlied@...ba.org> informed us about a bug in the
    authentication code of pam_smb that allows a remote attacker to gain
    access to a system using pam_smb by issuing a too long password string.

    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.



    Intel i386 Platform:

    SuSE-8.2:
    ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/pam_smb-1.1.6-501.i586.rpm
      77b933d95963020022c0b8ec426b1b33
    patch rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/pam_smb-1.1.6-501.i586.patch.rpm
      be26f459b855e0eb8a7aeb048966aff2
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/src/pam_smb-1.1.6-501.src.rpm
      f533ca1293f8a70db9d5ad2cc1aca1eb

    SuSE-8.1:
    ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/pam_smb-1.1.6-500.i586.rpm
      b12d1f7897319eabaccd3241c40a022a
    patch rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/pam_smb-1.1.6-500.i586.patch.rpm
      7bac2fa8229633f5329e51cc4474514f
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/pam_smb-1.1.6-500.src.rpm
      84a8f0156950582354832d9850964829

    SuSE-8.0:
    ftp://ftp.suse.com/pub/suse/i386/update/8.0/n4/pam_smb-1.1.6-500.i386.rpm
      d340b5e40b5a70ba91613c6328995b32
    patch rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.0/n4/pam_smb-1.1.6-500.i386.patch.rpm
      f60ff0bb02f6e5d0346db13075cb819a
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/pam_smb-1.1.6-500.src.rpm
      1bbd9e875b5952dedfe2b5a0754e5619

    SuSE-7.3:
    ftp://ftp.suse.com/pub/suse/i386/update/7.3/n2/pam_smb-1.1.6-501.i386.rpm
      7223b46ae84c85e343c9ebbf1b7d93fc
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/pam_smb-1.1.6-501.src.rpm
      d98153d86906f0c658fc076c4e7bc2e3

    SuSE-7.2:
    ftp://ftp.suse.com/pub/suse/i386/update/7.2/n2/pam_smb-1.1.6-500.i386.rpm
      5e13b0856e21bdfcf5f6b7bd3da6aced
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/pam_smb-1.1.6-500.src.rpm
      21a70e45e84f518f33c0180d145b922f




    Sparc Platform:

    SuSE-7.3:
    ftp://ftp.suse.com/pub/suse/sparc/update/7.3/n2/pam_smb-1.1.6-147.sparc.rpm
      c6d8dc37b190d80d198565391455547a
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/pam_smb-1.1.6-147.src.rpm
      da99ca714612b897b035477aaae5b600




    PPC Power PC Platform:

    SuSE-7.3:
    ftp://ftp.suse.com/pub/suse/ppc/update/7.3/n2/pam_smb-1.1.6-328.ppc.rpm
      0287905509e5d134ff9cd07be7aad701
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/pam_smb-1.1.6-328.src.rpm
      55659805dada2721d5d0f5598e3ede27


______________________________________________________________________________

2)  Pending vulnerabilities in SuSE Distributions and Workarounds:

    - gdm2
      Due to a bug in GDM it is possible for local users to read any text
      file on a system by creating a symlink from ~/.xsession-errors.
      Updated packages will be available on our FTP servers soon.

    - whois
      The client tool whois is vulnerable to several buffer overflows
      while processing its command-line arguments. In conjunction with using
      untrusted data from remote sources as input, like using whois in a CGI
      script and so on, this buffer overflows may be abused to compromise
      a system.
      New whois packages are built and will be released at the usual
      locations as soon as quality assurance is passed.

    - node
      The simple hamradio front-end node is vulnerable to buffer overflows
      and format-string bugs.
      New packages will be available soon.

    - postgresql
      The SQL database server postgresql of version 7.3.x prior 7.3.4 is
      vulnerable to buffer overflow attacks.
      New packages will be available soon.

    - gkrellm
      The server component of the gkrellm monitoring package is
      vulnerable to a buffer overflow.
      News packages will be available soon.

______________________________________________________________________________

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@...e.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@...e.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@...e.com
        -   general/linux/SuSE security discussion.
            All SuSE security announcements are sent to this list.
            To subscribe, send an email to
                <suse-security-subscribe@...e.com>.

    suse-security-announce@...e.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@...e.com>.

    For general information or the frequently asked questions (faq)
    send mail to:
        <suse-security-info@...e.com> or
        <suse-security-faq@...e.com> respectively.

    =====================================================================
    SuSE's security contact is <security@...e.com> or <security@...e.de>.
    The <security@...e.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@...e.de>
pub  1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <build@...e.de>

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Bye,
     Thomas
-- 
  Thomas Biege <thomas@...e.de>
  SuSE Linux AG,Deutschherrnstr. 15-19,90429 Nuernberg
  Function: Security Support & Auditing
  "lynx -source http://www.suse.de/~thomas/contact/thomas.asc | pgp -fka"
  Key fingerprint = 51 AD B9 C7 34 FC F2 54  01 4A 1C D4 66 64 09 83
-- 
	... bring the pieces back together, we discover communication...
				- Maynard James Keenan



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