From: Marcus Meissner (meissnersuse.de)
Date: Fri Feb 18 2005 - 10:36:26 CST

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______________________________________________________________________________

                        SUSE Security Summary Report

        Announcement-ID: SUSE-SR:2005:005
        Date: Friday, Feb 18th 2005 18:00 MEST
        Cross References: CAN-2004-1184
                                CAN-2004-1185
                                CAN-2004-1186
                                CAN-2005-0089
                                CAN-2005-0227
                                CAN-2005-0372
                                CAN-2003-0190

    Content of this advisory:
        1) solved security vulnerabilities:
            - multiple enscript problems
            - clamav update to 0.82
            - postgresql LOAD vulnerability
            - python: SimpleXMLRPCServer flaw
            - openssh information leak
            - gftp directory traversal
            - openldap2 denial of service

        2) pending vulnerabilities, solutions, workarounds:
            - problems with kernel update for SUSE Linux 9.1
            - IDN cloaking problems with all browsers
            - multiple wget problems
            - new PostgreSQL problems
            - New kernel security problems

        3) standard appendix (further information)

______________________________________________________________________________

1) solved security vulnerabilities

   To avoid spamming lists with advisories for every small incident,
   we will release weekly summary advisories for issues where we have
   released updates without a full advisory. Since these are minor
   issues, md5sums and ftp URLs are not included.

   Fixed packages for the following incidents are already available on
   our FTP server and via the YaST Online Update.

   - Multiple enscript problems

     The text to postscript converter enscript has several security
     related problems, relating to input validation (CAN-2004-1184),
     missing sanitizing of filenames (CAN-2004-1185) and multiple
     buffer overflows (CAN-2004-1186).

     All SUSE Linux based products were affected.

   - clamav update to 0.82

     The clamav virus scanner software was updated to 0.82, featuring
     several scan engine improvements, especially for strangely formatted
     mails.

     SUSE Linux versions 9.1 and 9.2, and SUSE Linux Enterprise Server 9
     were affected.

   - postgresql LOAD vulnerability

     A vulnerability in the PostgreSQL 'LOAD' statement was fixed.
     This issue is tracked by the Mitre CVE ID CAN-2005-0227.

     All SUSE Linux based products were affected.

   - python: SimpleXMLRPCServer flaw

     This update fixes a bug in the SimpleXMLRPCServer which
     affects any program which allows remote untrusted users to
     do unrestricted traversal. The vulnerability can be used to
     access and change internal functions. This is tracked by the
     Mitre CVE ID CAN-2005-0089.

     All SUSE Linux based products were affected.

   - openssh information leak

     Openssh as shipped with SUSE Linux allows a possible timing
     attack that could be abused remotely to determine existing users
     on the system by watching replies to failed password attempts.

     This is tracked by the Mitre CVE ID CAN-2003-0190.

     Additionally the output of failing PAM sessions will now be
     displayed and the terminal-setting for aborted login-sessions
     will get restored correctly.

     This bugfix was released for SUSE Linux 9.1, 9.2 and SUSE Linux
     Enterprise Server 9.

   - gftp directory traversal

     Improper handling of filenames containing slashes allowed a
     malicious ftp server to overwrite files in the system if the
     user used gftp. This is tracked by the Mitre CVE ID
     CAN-2005-0372.

     SUSE Linux 9.1, 9.2 and Novell Linux Desktop 9 were affected.

   - openldap2 denial of service

     It was possible for a remote attacker to crash the openldap2
     slapd LDAP server daemon by sending special query strings.
     (No Mitre CVE ID was assigned to this issue, it is backport
     from an upstream fix.)

     Additionally this update fixes several bugs spotted during
     Open Enterprise Server testing.

     All SUSE Linux based products were affected.

______________________________________________________________________________

2) Pending vulnerabilities in SUSE Distributions and Workarounds:

    - problems with kernel update for SUSE Linux 9.1

      Several users of NVidia cards reported problems with the last SUSE
      Linux 9.1 kernel update, leaving the screen black and the machine
      hung after reboot.

      We are working on a fix for this problem.

      Up to then you can either use an older 9.1 kernel, or
      compile the Nvidia driver for your own.

    - multiple wget problems

      We have still no solution for the wget issues as reported on Bugtraq:
             http://www.securityfocus.com/archive/1/383998

    - IDN (Internationalized Domain Name) cloaking / homograph attacks

      Problems with the IDN / punycode handling that allows non-ASCII
      domain names were reported for every browser.

      We are aware of these issues and expect a good solution soon.

    - new PostgreSQL problems

      Additional PostgreSQL problems were reported:
      - A local user could bypass the EXECUTE permission check for
        functions by using the CREATE AGGREGATE command. CAN-2005-0244

      - Multiple buffer overflows were found in PL/PgSQL. CAN-2005-0245,
        CAN-2005-0247

      - A flaw in contrib/intagg CAN-2005-0246

      We are working on updates for this problem.

    - New kernel security problems

      New kernel security problems in regards to signedness issues have
      been spotted by Georgi Guninski.

      We are working on updates for this problems.

______________________________________________________________________________

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 securitysuse.de),
       the checksums show proof of the authenticity of the package.
       We recommend against subscribing to security lists that cause the
       e-mail 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
       file name of the rpm package that you have downloaded. Of course,
       package authenticity verification can only target an uninstalled 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 "buildsuse.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-securitysuse.com
        - general/linux/SUSE security discussion.
            All SUSE security announcements are sent to this list.
            To subscribe, send an email to
                <suse-security-subscribesuse.com>.

    suse-security-announcesuse.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-subscribesuse.com>.

    For general information or the frequently asked questions (FAQ)
    send mail to:
        <suse-security-infosuse.com> or
        <suse-security-faqsuse.com> respectively.

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

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