July 9, 2002

SuSE Linux advisory: squid

SuSE: Several security related bugs have been found in all squid packages
contained in SuSE products. These bugs are being fixed in our update
packages and cover modifications in the gopher client code, the FTP
directory listing parser that generates HTML output, FTP protocol
sanity checks concerning server address comparison between control
and data connection, in the MSNT auth helper as well as in proxy
authentication forwarding code. Our update packages also contain
non-security relevant additions as suggested by the squid developers."

____________________________________________________________________________

                        SuSE Security Announcement

        Package:                squid
        Announcement-ID:        SuSE-SA:2002:025
        Date:                   Tuesday, Jul 9th 2002 01:30 MEST
        Affected products:      6.4, 7.0, 7.1, 7.2, 7.3, 8.0
                                SuSE Linux Connectivity Server
                                SuSE Linux Enterprise Server
        Vulnerability Type:     possible remote code execution
        Severity (1-10):        6
        SuSE default package:   no

    Content of this advisory:
        1) security vulnerability resolved: squid
           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

    squid is a web proxy cache contained but not installed and activated
    by default on SuSE products.

    Several security related bugs have been found in all squid packages
    contained in SuSE products. These bugs are being fixed in our update
    packages and cover modifications in the gopher client code, the FTP
    directory listing parser that generates HTML output, FTP protocol
    sanity checks concerning server address comparison between control
    and data connection, in the MSNT auth helper as well as in proxy
    authentication forwarding code. Our update packages also contain
    non-security relevant additions as suggested by the squid developers.
    The severity of the errors in the package range from harmless to critical.
    The gopher client bugs as well as the bug in the FTP directory parsing
    code are believed to be exploitable in the sense of being able to remotely
    execute code introduced by the attacker. The bug in the MSNT auth helper
    does not affect our binary packages because the feature is not activated
    at compile time.
    While Olaf Kirch (SuSE Security) has found and also fixed parts of the
    bugs, SuSE Security has not verified the claim about the remote
    exploitability to execute code, though.
    For more information about the squid web proxy and first-hand information
    about the security problems found, please see the project's website at
    http://www.squid-cache.org/.

    A brief note about the package names in the distributions:
    All SuSE Linux distributions contain two squid packages. The names are
    squid2 and squid23 for SuSE Linux 6.4 through 7.1, and squid and
    squid-beta for all newer distributions. The squid-beta package on SuSE
    Linux 8.0 is unaffected.
    To find out which version of the squid package you are using, use the
    command
        rpm -qf `which squid`


    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.

    After applying the rpm command for the update, you should restart the
    squid daemon process for the update to become effective:
        rcsquid stop ; sleep 10; rcsquid start

    Our maintenance customers have been notified individually. The packages
    are being offered to install from the maintenance web.



    i386 Intel Platform:

    SuSE-8.0
    ftp://ftp.suse.com/pub/suse/i386/update/8.0/n2/squid-2.4.STABLE6-2.i386.rpm
      01f5c698e0418e6055e9ed1018493380
    ftp://ftp.suse.com/pub/suse/i386/update/8.0/n2/squid-2.4.STABLE6-9.i386.patch.rpm

      917c26da9c444085d045b708548eae3e
    ftp://ftp.suse.com/pub/suse/i386/update/8.0/n2/squid-2.4.STABLE6-9.i386.rpm
      fa4780901f96712ea22eef28bdf53700
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/squid-2.4.STABLE6-9.src.rpm
      dc96baf5541829ee6e615861d17146aa

    SuSE-7.3
    ftp://ftp.suse.com/pub/suse/i386/update/7.3/n2/squid-2.3.STABLE4-162.i386.rpm
      86df1f5a50ed65cd038d9cc2b2782f9b
    ftp://ftp.suse.com/pub/suse/i386/update/7.3/n2/squid-beta-2.4.STABLE2-99.i386.rpm
      4d1462ec0691eb0b6572b67064d5899b
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/squid-2.3.STABLE4-162.src.rpm

      ab61356851ac840d427f1ffd94ff6d14
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/squid-beta-2.4.STABLE2-99.src.rpm
      c75a0693b587827017fd7f7b6f387d43

    SuSE-7.2
    ftp://ftp.suse.com/pub/suse/i386/update/7.2/n2/squid-2.3.STABLE4-162.i386.rpm
      0eb805295d26ae7a634e70248536f743
    ftp://ftp.suse.com/pub/suse/i386/update/7.2/n2/squid-beta-2.4.STABLE1-105.i386.rpm
      7c710d4080457b90c90c9641ceb27923
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/squid-2.3.STABLE4-162.src.rpm
      9e2d0f0a81d3231bb36efce6eb09b806
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/squid-beta-2.4.STABLE1-105.src.rpm

      f6a59ea75478277a5cf1eaa45308e2db

    SuSE-7.1
    ftp://ftp.suse.com/pub/suse/i386/update/7.1/n2/squid2-2.2.STABLE5-224.i386.rpm
      458c23172bd607c2e1b64bcca668743f
    ftp://ftp.suse.com/pub/suse/i386/update/7.1/n2/squid23-2.3.STABLE4-82.i386.rpm
      aef3ece720951def7e22cdd28b65782a
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/squid2-2.2.STABLE5-224.src.rpm
      66edc4b69aa84aecfe33efef5589611e
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/squid23-2.3.STABLE4-82.src.rpm
      7c01a574da94df5b72b864a1648021d3

    SuSE-7.0
    ftp://ftp.suse.com/pub/suse/i386/update/7.0/n1/squid2-2.2.STABLE5-223.i386.rpm

      05603a978583210b281ab4860fef6f00
    ftp://ftp.suse.com/pub/suse/i386/update/7.0/n1/squid23-2.3.STABLE4-81.i386.rpm
      ae208d4e4896f8092f122a2e79f472f3
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/7.0/zq1/squid2-2.2.STABLE5-223.src.rpm
      11d569d72642b2a4414b0c35a87a0bd1
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/7.0/zq1/squid23-2.3.STABLE4-81.src.rpm
      990b507d6c8ea50f10ba7fe6b218bcfb

    SuSE-6.4
    ftp://ftp.suse.com/pub/suse/i386/update/6.4/n1/squid2-2.2.STABLE5-223.i386.rpm
      56dc0b40ae95bce1e49c1758920debd0
    ftp://ftp.suse.com/pub/suse/i386/update/6.4/n1/squid23-2.3.STABLE4-81.i386.rpm

      907f05e3be9012003a8d6fbce866b8c5
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/6.4/zq1/squid2-2.2.STABLE5-223.src.rpm
      2e8655ca0fbdd53f45c64990de92697e
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/6.4/zq1/squid23-2.3.STABLE4-81.src.rpm
      58e1d68d8e5dc8dbcc9d53446436e077




    Sparc Platform:

    SuSE-7.3
    ftp://ftp.suse.com/pub/suse/sparc/update/7.3/n2/squid-2.3.STABLE4-57.sparc.rpm
      fe3040600c6f08394db78a73d435475b
    ftp://ftp.suse.com/pub/suse/sparc/update/7.3/n2/squid-beta-2.4.STABLE2-27.sparc.rpm
      f0e296889bcc571da9a35cd02d6efd9c
    source rpm:
    ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/squid-2.3.STABLE4-57.src.rpm

      dfbc5f10d9993d299b420d1787b14c0b
    source rpm:
    ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/squid-beta-2.4.STABLE2-27.src.rpm
      dc6ff79b6e48821b81b1d53a837fe88c

    SuSE-7.1
    ftp://ftp.suse.com/pub/suse/sparc/update/7.1/n2/squid2-2.2.STABLE5-210.sparc.rpm
      6fc7ded2b633825957959cd0a373c4d2
    ftp://ftp.suse.com/pub/suse/sparc/update/7.1/n2/squid23-2.3.STABLE4-63.sparc.rpm
      43693ee6312ce6f178baeb50340d8639
    source rpm:
    ftp://ftp.suse.com/pub/suse/sparc/update/7.1/zq1/squid2-2.2.STABLE5-210.src.rpm
      5cae476344a776ce50a1a1805ef4ffcc
    source rpm:
    ftp://ftp.suse.com/pub/suse/sparc/update/7.1/zq1/squid23-2.3.STABLE4-63.src.rpm

      65fdf61f12b9c4ec5c91857c3af76497

    SuSE-7.0
    ftp://ftp.suse.com/pub/suse/sparc/update/7.0/n1/squid2-2.2.STABLE5-210.sparc.rpm
      e928951c8d068e982bb00b50472d716d
    ftp://ftp.suse.com/pub/suse/sparc/update/7.0/n1/squid23-2.3.STABLE4-63.sparc.rpm
      cafe9565d1021f69ee31636d8d854457
    source rpm:
    ftp://ftp.suse.com/pub/suse/sparc/update/7.0/zq1/squid2-2.2.STABLE5-210.src.rpm
      ebd9c000ab1da0db1ea99998b3f0cf15
    source rpm:
    ftp://ftp.suse.com/pub/suse/sparc/update/7.0/zq1/squid23-2.3.STABLE4-63.src.rpm

      149927211efa4c2419eed6b000859689





    AXP Alpha Platform:

    SuSE-7.1
    ftp://ftp.suse.com/pub/suse/axp/update/7.1/n2/squid2-2.2.STABLE5-230.alpha.rpm
      4df2821b296d2cd980b516a690b9a1bd
    ftp://ftp.suse.com/pub/suse/axp/update/7.1/n2/squid23-2.3.STABLE4-80.alpha.rpm
      a01625b4b191f84fff32e38c8d336fac
    source rpm:
    ftp://ftp.suse.com/pub/suse/axp/update/7.1/zq1/squid2-2.2.STABLE5-230.src.rpm
      9deaebb24e5dfbe5f20a5488c279458e
    source rpm:
    ftp://ftp.suse.com/pub/suse/axp/update/7.1/zq1/squid23-2.3.STABLE4-80.src.rpm
      2ec1d32a64dbdb0a15d892dd622c091a

    SuSE-7.0
    ftp://ftp.suse.com/pub/suse/axp/update/7.0/n1/squid2-2.2.STABLE5-230.alpha.rpm

      73b3f402a7f50ccb6ac9045da87b1c40
    ftp://ftp.suse.com/pub/suse/axp/update/7.0/n1/squid23-2.3.STABLE4-79.alpha.rpm
      6938b75054e93f2ec1520e0b3b093790
    source rpm:
    ftp://ftp.suse.com/pub/suse/axp/update/7.0/zq1/squid2-2.2.STABLE5-230.src.rpm
      ddef84a2c1c430d341c1b8e8ae1a0d77
    source rpm:
    ftp://ftp.suse.com/pub/suse/axp/update/7.0/zq1/squid23-2.3.STABLE4-79.src.rpm
      faaf272a46f39ebc0d6956cb8b508395

    SuSE-6.4
    ftp://ftp.suse.com/pub/suse/axp/update/6.4/n1/squid2-2.2.STABLE5-230.alpha.rpm
      d308089c0b35b812a6bece1b612bd171
    ftp://ftp.suse.com/pub/suse/axp/update/6.4/n1/squid23-2.3.STABLE4-78.alpha.rpm

      a2446410ef8fd3b0832394bc52cae927
    source rpm:
    ftp://ftp.suse.com/pub/suse/axp/update/6.4/zq1/squid2-2.2.STABLE5-230.src.rpm
      2a0837f760ec3262268645a5d1dd99ce
    source rpm:
    ftp://ftp.suse.com/pub/suse/axp/update/6.4/zq1/squid23-2.3.STABLE4-78.src.rpm
      01d07096af26e19aecf35ae29fc39f85





    PPC Power PC Platform:

    SuSE-7.3
    ftp://ftp.suse.com/pub/suse/ppc/update/7.3/n2/squid-2.3.STABLE4-77.ppc.rpm
      6d84192dfcfa15ec05ee0c1fbf8cc564
    ftp://ftp.suse.com/pub/suse/ppc/update/7.3/n2/squid-beta-2.4.STABLE2-64.ppc.rpm
      fde4eea7193755ecb72c8e98006efc83
    source rpm:
    ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/squid-2.3.STABLE4-77.src.rpm

      44c07a7d4b37be012c87b1057c38728c
    source rpm:
    ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/squid-beta-2.4.STABLE2-64.src.rpm
      7ca4b1b7a1802bffdffef3b6d5d342a5

    SuSE-7.1
    ftp://ftp.suse.com/pub/suse/ppc/update/7.1/n2/squid2-2.2.STABLE5-203.ppc.rpm
      28b9a3b64fe23408a4bd16031d384b02
    ftp://ftp.suse.com/pub/suse/ppc/update/7.1/n2/squid23-2.3.STABLE4-73.ppc.rpm
      b7a2e5c2a446a2848537fe65362e8cb5
    source rpm:
    ftp://ftp.suse.com/pub/suse/ppc/update/7.1/zq1/squid2-2.2.STABLE5-203.src.rpm
      d0a9141bac8b44f826698b0d90c91d80
    source rpm:
    ftp://ftp.suse.com/pub/suse/ppc/update/7.1/zq1/squid23-2.3.STABLE4-73.src.rpm

      488f2d67c6a300bca3d06a6cff26988f

    SuSE-7.0
    ftp://ftp.suse.com/pub/suse/ppc/update/7.0/n1/squid2-2.2.STABLE5-202.ppc.rpm
      5ef4ef00e866d0efb451334bc12a8db7
    ftp://ftp.suse.com/pub/suse/ppc/update/7.0/n1/squid23-2.3.STABLE4-72.ppc.rpm
      ceba8ae4348b499d75a8798282899fff
    source rpm:
    ftp://ftp.suse.com/pub/suse/ppc/update/7.0/zq1/squid2-2.2.STABLE5-202.src.rpm
      d2a8b8bbc4c93073ddba930b96a0a459
    source rpm:
    ftp://ftp.suse.com/pub/suse/ppc/update/7.0/zq1/squid23-2.3.STABLE4-72.src.rpm
      a1e44b9a51d96125e7664a784a1fbce0

    SuSE-6.4
    ftp://ftp.suse.com/pub/suse/ppc/update/6.4/n1/squid2-2.2.STABLE5-202.ppc.rpm

      84afced56c0f0a4502bab69ed6de7cc1
    ftp://ftp.suse.com/pub/suse/ppc/update/6.4/n1/squid23-2.3.STABLE4-72.ppc.rpm
      fe9ce325bb9580f0c8a9804800ac9179
    source rpm:
    ftp://ftp.suse.com/pub/suse/ppc/update/6.4/zq1/squid2-2.2.STABLE5-202.src.rpm
      c1d61ef183dd5b11191f6872852b24e9
    source rpm:
    ftp://ftp.suse.com/pub/suse/ppc/update/6.4/zq1/squid23-2.3.STABLE4-72.src.rpm
      ef6b394d43f64936df30f9ffcd315495


____________________________________________________________________________

2)  Pending vulnerabilities in SuSE Distributions and Workarounds:

  - We are investigating if recently found weaknesses in resolver libraries
    on BSD systems affect the SuSE Linux glibc as well. Also, the resolver
    code in bind nameserver utilities is under investigation.
    Further news about the resolver issues is underway.

  - ghostscript
    RedHat released a security announcement concerning a problem in
    ghostscript, which could be exploited to gain privilege of the print
    server user. We are investigating whether SuSE Linux is affected.

____________________________________________________________________________

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 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 "build@suse.de" upon installation or upgrade, provided that
           the package gpg is installed. The file containing the public key
           is placed at the toplevel 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 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> 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 cleartext signature shows proof of the
    authenticity of the text.
    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  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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