SuSE: 'sdb' vulnerability

    Date20 Aug 2001
    CategorySuSE
    2546
    Posted ByLinuxSecurity Advisories
    Sdbsearch.cgi is Perl script which is part of the sdb package of SuSE Linux was found vulnerable by using untrustworthy client input (HTTP_REFERER)
    
    ______________________________________________________________________________
    
                            SuSE Security Announcement
    
            Package:                sdb
            Announcement-ID:        SuSE-SA:2001:027
            Date:                   Monday, August 20th 2001 10:00 MEST
            Affected SuSE versions: [6.0, 6.1, 6.2,] 6.3, 6.4, 7.0, 7.1, 7.2
            Vulnerability Type:     local (maybe remote) privilege escalation
            Severity (1-10):        4
            SuSE default package:   yes
            Other affected systems: no
    
            Content of this advisory:
            1) security vulnerability resolved: sdbsearch.cgi
               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
    
      Sdbsearch.cgi is Perl script which is part of the sdb package of SuSE Linux
      was found vulnerable by using untrustworthy client input (HTTP_REFERER).
      By exploiting this trust an attacker could force the sdbsearch.cgi script
      to open a malicious keylist file which includes keywords and filenames.
      By replacing the filename in the keylist file with the Perl pipe followed
      by arbitrary shell commands the sdbsearch.cgi would execute these commands
      when trying to open these 'filenames'.
      Note, that the attacker needs local access to the machine to store the
      keylist file on the server running sdbsearch.cgi. Misconfigured ftp
      accounts, trojan tar balls or RPM files could also be used.
    
      Sdbsearch.cgi on SuSE Linux 7.1 and 7.2 is not exploitable, because
      Perl's taint mode is used, nevertheless the HTTP_REFERER variable is still
      unfiltered and fully trusted. So, users of SuSE Linux 7.1 and 7.2 are
      not in danger but should update to avoid future attacks.
    
      Please update your machines with the new RPMs from our ftp server.
    
    
      i386 Intel Platform:
    
      SuSE-7.2
         ftp://ftp.suse.com/pub/suse/i386/update/7.2/doc1/sdb-2001.5.15-6.noarch.rpm
          4230c06f2e703753e79ee0e50339567b
        source rpm:
         ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/sdb-2001.5.15-6.src.rpm
          7090b18b0f5eeb3a4459134eda2b05ee
    
      SuSE-7.1
         ftp://ftp.suse.com/pub/suse/i386/update/7.1/doc1/sdb-2001.1.18-2.noarch.rpm
          5db3cb4341829769eea4d1f9c7466800
        source rpm:
         ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/sdb-2001.1.18-2.src.rpm
          97898cb2e0cd184b01dd8e6309ab166b
    
      SuSE-7.0
         ftp://ftp.suse.com/pub/suse/i386/update/7.0/doc1/sdb-2000.7.14-3.noarch.rpm
          f12bc106ec92359c7c382ef1e103656f
        source rpm:
         ftp://ftp.suse.com/pub/suse/i386/update/7.0/zq1/sdb-2000.7.14-3.src.rpm
          4c9034a7376f8cf2e554f7d41e57b984
    
      SuSE-6.4
         ftp://ftp.suse.com/pub/suse/i386/update/6.4/doc1/sdb-2000.3.13-1.noarch.rpm
          0627c5db673924c7f7a5526b3fc56f0d
        source rpm:
         ftp://ftp.suse.com/pub/suse/i386/update/6.4/zq1/sdb-2000.3.13-1.src.rpm
          d71b0df1e08745f15b8d95d66718e2b4
    
      SuSE-6.3
         ftp://ftp.suse.com/pub/suse/i386/update/6.3/doc1/sdb-99.11.8-10.noarch.rpm
          9917fe4a3735dfb568a60af8c919c26f
        source rpm:
         ftp://ftp.suse.com/pub/suse/i386/update/6.3/zq1/sdb-99.11.8-10.src.rpm
          3c0d5d7fe8b5720350b501deca82beca
    
    
    
      Sparc Platform:
    
      SuSE-7.1
         ftp://ftp.suse.com/pub/suse/sparc/update/7.1/doc1/sdb-2001.1.18-0.noarch.rpm
          f33dd4b47cdb20eaec420353a570da41
        source rpm:
         ftp://ftp.suse.com/pub/suse/sparc/update/7.1/zq1/sdb-2001.1.18-0.src.rpm
          a2b3a11161c24decfa7e52ccf668d613
    
      SuSE-7.0
         ftp://ftp.suse.com/pub/suse/sparc/update/7.0/doc1/sdb-2000.7.14-0.noarch.rpm
          ee8010587e5a6424fd4c83d2dbf0d3ef
        source rpm:
         ftp://ftp.suse.com/pub/suse/sparc/update/7.0/zq1/sdb-2000.7.14-0.src.rpm
          0a2af53aa95673e3f3ee45195f09b4dc
    
    
    
      AXP Alpha Platform:
    
      SuSE-7.1
         ftp://ftp.suse.com/pub/suse/axp/update/7.1/doc1/sdb-2001.1.18-0.noarch.rpm
          b9329d16642aaa28b3560db19c40ca29
        source rpm:
         ftp://ftp.suse.com/pub/suse/axp/update/7.1/zq1/sdb-2001.1.18-0.src.rpm
          27df8d88110edb5f9c2476e0f5da2eb0
    
      SuSE-7.0
         ftp://ftp.suse.com/pub/suse/axp/update/7.0/doc1/sdb-2000.7.14-0.noarch.rpm
          0cbca12b0256424db89d8c0d6d860c7a
        source rpm:
         ftp://ftp.suse.com/pub/suse/axp/update/7.0/zq1/sdb-2000.7.14-0.src.rpm
          9ff9e6d196f90309c752e0a9308ded56
    
      SuSE-6.4
         ftp://ftp.suse.com/pub/suse/axp/update/6.4/doc1/sdb-2000.3.13-0.noarch.rpm
          1dc3c27aabadcf64556412e7e388b2d7
        source rpm:
         ftp://ftp.suse.com/pub/suse/axp/update/6.4/zq1/sdb-2000.3.13-0.src.rpm
          300beb396532ea3ad9b390de90be1cd6
    
      SuSE-6.3
         ftp://ftp.suse.com/pub/suse/axp/update/6.3/doc1/sdb-99.11.8-2.noarch.rpm
          ab236bf7c71b3081eac9f1897fe3d135
        source rpm:
         ftp://ftp.suse.com/pub/suse/axp/update/6.3/zq1/sdb-99.11.8-2.src.rpm
          07ddf02d2c245bfc6f66e81a25ee99a4
    
    
    
      PPC PowerPC Platform:
    
      SuSE-7.1
         ftp://ftp.suse.com/pub/suse/ppc/update/7.1/doc1/sdb-2001.1.18-0.noarch.rpm
          aa2e8090238df36f982d9829257bdb7c
        source rpm:
         ftp://ftp.suse.com/pub/suse/ppc/update/7.1/zq1/sdb-2001.1.18-0.src.rpm
          54baed3e4631595f61111b71b7245785
    
      SuSE-7.0
         ftp://ftp.suse.com/pub/suse/ppc/update/7.0/doc1/sdb-2000.7.14-0.noarch.rpm
          75d51a9cc5ee4ea0dd0a20bceba17383
        source rpm:
         ftp://ftp.suse.com/pub/suse/ppc/update/7.0/zq1/sdb-2000.7.14-0.src.rpm
          2bded9520b27c41a9df74b3a41d73daf
    
      SuSE-6.4
         ftp://ftp.suse.com/pub/suse/ppc/update/6.4/doc1/sdb-2000.3.13-0.noarch.rpm
          009dcfd705d5528f21b81c2befaa8187
        source rpm:
         ftp://ftp.suse.com/pub/suse/ppc/update/6.4/zq1/sdb-2000.3.13-0.src.rpm
          029868fdc7d369515f0fb8d5b6be2532
    
    
    
    ______________________________________________________________________________
    
    2)  Pending vulnerabilities in SuSE Distributions and Workarounds:
    
      Please watch out for more announcements that are currently in our queue.
    
    
    ______________________________________________________________________________
    
    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 
           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 This email address is being protected from spambots. You need JavaScript enabled to view it.),
           the checksums show proof of the authenticity of the package.
           We advise against subscribing to 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 
           to verify the signature of the package, where  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 "This email address is being protected from spambots. You need JavaScript enabled to view it." 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:
    
        This email address is being protected from spambots. You need JavaScript enabled to view it.
            -   general/linux/SuSE security discussion.
                All SuSE security announcements are sent to this list.
                To subscribe, send an email to
                    <This email address is being protected from spambots. You need JavaScript enabled to view it.>.
    
        This email address is being protected from spambots. You need JavaScript enabled to view it.
            -   SuSE's announce-only mailing list.
                Only SuSE's security annoucements are sent to this list.
                To subscribe, send an email to
                    <This email address is being protected from spambots. You need JavaScript enabled to view it.>.
    
        For general information or the frequently asked questions (faq)
        send mail to:
            <This email address is being protected from spambots. You need JavaScript enabled to view it.> or
            <This email address is being protected from spambots. You need JavaScript enabled to view it.> respectively.
    
        ===================================================
        SuSE's security contact is <This email address is being protected from spambots. You need JavaScript enabled to view it.>.
        The <This email address is being protected from spambots. You need JavaScript enabled to view it.> 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 <This email address is being protected from spambots. You need JavaScript enabled to view it.>
    pub  1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <This email address is being protected from spambots. You need JavaScript enabled to view it.>
    
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