[Full-Disclosure] SUSE Security Announcement: sane (SuSE-SA:2003:046)

From: Thomas Biege (thomas_at_suse.de)
Date: 11/18/03

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

    ______________________________________________________________________________

                            SUSE Security Announcement

            Package: sane
            Announcement-ID: SuSE-SA:2003:046
            Date: Tuesday, Nov 18th 2003 14:30 MEST
            Affected products: 7.3, 8.0, 8.1
                                    SuSE Linux Desktop 1.0
            Vulnerability Type: remote denial-of-service
            Severity (1-10): 5
            SUSE default package: yes
            Cross References: CAN-2003-0773
                                    CAN-2003-0774
                                    CAN-2003-0775
                                    CAN-2003-0776
                                    CAN-2003-0777
                                    CAN-2003-0778

        Content of this advisory:
            1) security vulnerability resolved: several security vulnerabilities
               problem description, discussion, solution and upgrade information
            2) pending vulnerabilities, solutions, workarounds:
               - ethereal
               - KDE
               - KDE wrong file permissions
               - ircd
               - mc
               - apache1/2
               - proftpd
               - gdm2
               - epic/epic4
            3) standard appendix (further information)

    ______________________________________________________________________________

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

        The sane (Scanner Access Now Easy) package provides access to scanners
        either locally or remotely over the network.

        Several bugs in sane were fixed to avoid remote denial-of-service
        attacks. These attacks can even be executed if the remote attacker
        is not allowed to access the sane server by not listing the attackers
        IP in the file sane.conf.
        Per default saned only accepts local requests.

        As a temporary workaround saned can be started via xinetd or inetd in
        conjunction with tcpwrapper to restrict remote access.

        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-8.1:
        ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/sane-1.0.8-143.i586.rpm
          5b728bc3ac724be64aa736dbebe2aa23
        patch rpm(s):
        ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/sane-1.0.8-143.i586.patch.rpm
          77ab2574c35513136076c4b2a77e9cbf
        source rpm(s):
        ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/sane-1.0.8-143.src.rpm
          6ddec5bdadb07f985a08e592cd4c68b3

        SuSE-8.0:
        ftp://ftp.suse.com/pub/suse/i386/update/8.0/gra2/sane-1.0.7-217.i386.rpm
          9438d81c7bd8b41dee948696f138c771
        patch rpm(s):
        ftp://ftp.suse.com/pub/suse/i386/update/8.0/gra2/sane-1.0.7-217.i386.patch.rpm
          f461a294ab7d3638bf4b3e83f3910143
        source rpm(s):
        ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/sane-1.0.7-217.src.rpm
          ea888fa0c4e6aaf41e23caaf4f68a1d2

        SuSE-7.3:
        ftp://ftp.suse.com/pub/suse/i386/update/7.3/gra1/sane-1.0.5-295.i386.rpm
          53d25817ed9c53cf6078d3794862a13e
        source rpm(s):
        ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/sane-1.0.5-295.src.rpm
          593a886a54482c841baa0fe9d43690c6

        Sparc Platform:

        SuSE-7.3:
        ftp://ftp.suse.com/pub/suse/sparc/update/7.3/gra1/sane-1.0.5-114.sparc.rpm
          bdb7ce58c8d363a03dadc719c2421d84
        source rpm(s):
        ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/sane-1.0.5-114.src.rpm
          4d0f4994f1fc730edfcefa2d33fe456d

        PPC Power PC Platform:

        SuSE-7.3:
        ftp://ftp.suse.com/pub/suse/ppc/update/7.3/gra1/sane-1.0.5-179.ppc.rpm
          83643306b81f0e89d4a5c96001a65ea5
        source rpm(s):
        ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/sane-1.0.5-179.src.rpm
          fa277cfb3ec68aedb24de2ff2d13673f

    ______________________________________________________________________________

    2) Pending vulnerabilities in SUSE Distributions and Workarounds:

        - ethereal
        A new official version of ethereal, a network traffic analyzer, was
        released to fix various security-related problems.
        An update package is currently being tested and will be released
        as soon as possible.

        - KDE
        New KDE packages are currently being tested. These packages fixes
        several vulnerabilities:
          + remote root compromise (CAN-2003-0690)
          + weak cookies (CAN-2003-0692)
          + SSL man-in-the-middle attack
          + information leak through HTML-referrer (CAN-2003-0459)
        The packages will be release as soon as testing is finished.

        - KDE wrong file permissions
        Due to a missing synchronisation during SuSE Linux 8.2 beta-testing
        phase some configuration files of KDE on SuSE Linux 8.2 are world-
        writeable. Please check the files in /etc/opt/kde3/share/config
        and add an appropritae line to /etc/permissions.local, like:
            /etc/opt/kde3/share/config/kmailrc root.root 0644
            /etc/opt/kde3/share/config/kioslaverc root.root 0644
            /etc/opt/kde3/share/config/kdeglobals root.root 0644
        Set the new permission with 'chkstat -set /etc/permissions.local'
        as root.

        - ircd
        The Internet Relay Chat daemon is vulnerable to a remote denial-of-
        service attack. The attack can be triggered by irc clients directly
        connected to the daemon.
        Update packages are available on our FTP servers.

        - mc
        By using a special combination of links in archive-files it is possible
        to execute arbitrary commands while mc tries to open it in its VFS.
        The packages are currently tested and will be release as soon as
        possible.

        - apache1/2
        The widely used HTTP server apache has several security vulnerabilities:
          - locally exploitable buffer overflow in the regular expression code.
            The attacker must be able to modify .htaccess or httpd.conf.
            (affects: mod_alias and mod_rewrite)
          - under some circumstances mod_cgid will output its data to the
            wrong client (affects: apache2)

        - proftpd
        A remote denial-of-service attack in the FTP server proftpd was fixed.
        The denial-of-service can be triggered by a one-byte buffer overflow
        with a fixed character. Therefore the bug can not be abused by an
        attacker to execute arbitrary code. If the binary is compiled with
        version 3.x of gcc this bug may not even lead to denial-of-service
        condition due to stack alignment.
        Update packages are available on our FTP servers.

        - gdm2
        Two remote denial-of-service attacks were fixed in GDM.
        Update packages are available on our FTP servers.

        - epic/epic4
        The well known IRC client epic can probably be exploited remotely by
        a malicious server.
        Update packages are available 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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    Bye,
         Thomas

    -- 
      Thomas Biege <thomas@suse.de>, SUSE LINUX AG, 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
    -- 
    	... stay with me, save and ignorant, go back to sleep...
    				- Maynard James Keenan
    _______________________________________________
    Full-Disclosure - We believe in it.
    Charter: http://lists.netsys.com/full-disclosure-charter.html
    

  • Next message: Valdis.Kletnieks_at_vt.edu: "Re: [Full-Disclosure] Sidewinder G2"

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    • SUSE Security Announcement: gaim (SuSE-SA:2004:004)
      ... with the privileges of the user running GAIM. ... Due to a human failure the kernel binaries of SuSE Linux Enterprise ... New packages are available at our maintenance-web. ... New packages are available on our FTP servers. ...
      (Bugtraq)