SuSe: openssl cryptographic weakness

    Date04 Apr 2003
    CategorySuSE
    2275
    Posted ByLinuxSecurity Advisories
    Researchers have discovered certain weaknesses in OpenSSL's RSA decryption algorithm.
    
    ______________________________________________________________________________
    
                            SuSE Security Announcement
    
            Package:                openssl
            Announcement-ID:        SuSE-SA:2003:024
            Date:                   Fri Apr  4 14:00:00 MEST 2003
            Affected products:      7.1, 7.2, 7.3, 8.0, 8.1
                                    SuSE Linux Database Server
                                    SuSE eMail Server III, 3.1
                                    SuSE Firewall Adminhost VPN
                                    SuSE Linux Admin-CD for Firewall
                                    SuSE Firewall on CD 2 - VPN
                                    SuSE Firewall on CD 2
                                    SuSE Linux Live-CD for Firewall
                                    SuSE Linux Connectivity Server
                                    SuSE Linux Enterprise Server 7
                                    SuSE Linux Enterprise Server 8
                                    SuSE Linux Office Server
                                    UnitedLinux 1.0
            Vulnerability Type:     remote private-key retrieval
            Severity (1-10):        5
            SuSE default package:   Yes
            Cross References:        http://www.openssl.org
    
        Content of this advisory:
            1) security vulnerability resolved: Remote timing attack and
               "Klima-Pokorny-Rosa" attack.
               problem description, discussion, solution and upgrade information
            2) pending vulnerabilities, solutions, workarounds:
                 - glibc
                 - vnc
            3) standard appendix (further information)
    
    ______________________________________________________________________________
    
    1)  problem description, brief discussion, solution, upgrade information
    
        Researchers from the University of Stanford have discovered certain
        weaknesses in OpenSSL's RSA decryption algorithm. It allows remote
        attackers to compute the private RSA key of a server by observing
        its timing behavior. This bug has been fixed by enabling "RSA blinding",
        by default.
          Additionally an extension of the "Bleichenbacher attack" has been
        developed by Czech researchers against OpenSSL. This weakness has
        also been fixed.
    
    
        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.
    
        i386 Intel Platform:
    
        SuSE-8.2:
         ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/openssl-0.9.6i-12.i586.rpm
          b418a2f73ab572f99f156335f3cd4ef4
         ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/openssl-devel-0.9.6i-12.i586.rpm
          d0539c626612c5fcd9b1e81e529dc3af
        patch rpm(s):
         ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/openssl-0.9.6i-12.i586.patch.rpm
          3c8a296170b34838db459a5aefc3e104
        patch rpm(s):
         ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/openssl-devel-0.9.6i-12.i586.patch.rpm
          8978902dde74da69f72c4ff93a90f1eb
        source rpm(s):
         ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/src/openssl-0.9.6i-12.src.rpm
          6dfaa0788bcdcb99939890d4bbd62826
    
        SuSE-8.1:
         ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/openssl-0.9.6g-68.i586.rpm
          2ecce759f2806b5ab475877b0ccd1f6f
         ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/openssl-devel-0.9.6g-68.i586.rpm
          aa79f7f72e503393f8fa9c34290ab497
        patch rpm(s):
         ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/openssl-0.9.6g-68.i586.patch.rpm
          68e33f6f3f90234a599e7473262e4924
         ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/openssl-devel-0.9.6g-68.i586.patch.rpm
          07ee91826db414421ad2a5a1abe27191
        source rpm(s):
         ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/openssl-0.9.6g-68.src.rpm
          177ff751ecf0e5e191b36e9df28479ee
    
        SuSE-8.0:
         ftp://ftp.suse.com/pub/suse/i386/update/8.0/sec1/openssl-0.9.6c-85.i386.rpm
          fabc6f1768cb113555690dbc26b26779
         ftp://ftp.suse.com/pub/suse/i386/update/8.0/d3/openssl-devel-0.9.6c-85.i386.rpm
          788751185ecf5c3538378de8f583c900
        patch rpm(s):
         ftp://ftp.suse.com/pub/suse/i386/update/8.0/sec1/openssl-0.9.6c-85.i386.patch.rpm
          dc19ef5b07fcd32d060e8c6c0f11d3e1
         ftp://ftp.suse.com/pub/suse/i386/update/8.0/d3/openssl-devel-0.9.6c-85.i386.patch.rpm
          0152c98bab2617456b7250431f37c41e
        source rpm(s):
         ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/openssl-0.9.6c-85.src.rpm
          66080ca41e143339ef95d7dd0c4c19fe
    
        SuSE-7.3:
         ftp://ftp.suse.com/pub/suse/i386/update/7.3/sec1/openssl-0.9.6b-156.i386.rpm
          7da5bae86380a034312d69e745bb1bb5
         ftp://ftp.suse.com/pub/suse/i386/update/7.3/d2/openssl-devel-0.9.6b-156.i386.rpm
          d54d7948b2a5cce732971890f51520a3
        source rpm(s):
         ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/openssl-0.9.6b-156.src.rpm
          13749156d3a6fd7597407a65bf2c527b
    
        SuSE-7.2:
         ftp://ftp.suse.com/pub/suse/i386/update/7.2/sec1/openssl-0.9.6a-82.i386.rpm
          105d9266ea2117bfa9643eb66441f39b
         ftp://ftp.suse.com/pub/suse/i386/update/7.2/d2/openssl-devel-0.9.6a-82.i386.rpm
          5d607333a4ddae3cb1e303a8afaf2f43
        source rpm(s):
         ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/openssl-0.9.6a-82.src.rpm
          7a06275dda66ea2e9da6c76425439369
    
        SuSE-7.1:
         ftp://ftp.suse.com/pub/suse/i386/update/7.1/sec1/openssl-0.9.6a-81.i386.rpm
          8bb8ea69f878aa08331269bf3f38afa2
         ftp://ftp.suse.com/pub/suse/i386/update/7.1/d2/openssl-devel-0.9.6a-81.i386.rpm
          dede7c66740ab249de577e5699e8639f
        source rpm(s):
         ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/openssl-0.9.6a-81.src.rpm
          07bc8370887abba6db3ace2d523eeade
    
    
        Sparc Platform:
    
        SuSE-7.3:
         ftp://ftp.suse.com/pub/suse/sparc/update/7.3/sec1/openssl-0.9.6b-89.sparc.rpm
          1391d007fdb5b99fd71aba949aeb0310
         ftp://ftp.suse.com/pub/suse/sparc/update/7.3/d2/openssl-devel-0.9.6b-89.sparc.rpm
          9f0ff708c016fd62d103cadbf3f6892e
        source rpm(s):
         ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/openssl-0.9.6b-89.src.rpm
          fac800ccac7c5f2c3eb544f5a7bf0aea
    
    
        AXP Alpha Platform:
    
        SuSE-7.1:
         ftp://ftp.suse.com/pub/suse/axp/update/7.1/sec1/openssl-0.9.6a-31.alpha.rpm
          c8d02c071cee8f6d70d8a9bb26b010f2
         ftp://ftp.suse.com/pub/suse/axp/update/7.1/d2/openssl-devel-0.9.6a-31.alpha.rpm
          13cdfd1f3b35ee90a7d09240a2a3df40
        source rpm(s):
         ftp://ftp.suse.com/pub/suse/axp/update/7.1/zq1/openssl-0.9.6a-31.src.rpm
          e64213b7b488d16de6152d94db9aaa99
    
    
        PPC Power PC Platform:
    
        SuSE-7.3:
         ftp://ftp.suse.com/pub/suse/ppc/update/7.3/sec1/openssl-0.9.6b-150.ppc.rpm
          cb2b6467cbad88c2ac4cecd889b2cb40
         ftp://ftp.suse.com/pub/suse/ppc/update/7.3/d2/openssl-devel-0.9.6b-150.ppc.rpm
          c11a579a40184ad6a108bfaa787b2038
        source rpm(s):
         ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/openssl-0.9.6b-150.src.rpm
          889ea0f28304224329a37d12390e370b
    
        SuSE-7.1:
         ftp://ftp.suse.com/pub/suse/ppc/update/7.1/sec1/openssl-0.9.6a-31.ppc.rpm
          1694ef2f2018cfcdd4a4bab97d21978b
         ftp://ftp.suse.com/pub/suse/ppc/update/7.1/d2/openssl-devel-0.9.6a-31.ppc.rpm
          f1b6838c46f3775d4ee6c51714247cb1
        source rpm(s):
         ftp://ftp.suse.com/pub/suse/ppc/update/7.1/zq1/openssl-0.9.6a-31.src.rpm
          5a8af3aa4592efba1194518b9a50253e
    
    
    ______________________________________________________________________________
    
    2)  Pending vulnerabilities in SuSE Distributions and Workarounds:
    
        - glibc
        New glibc packages will be available soon which fix a RPC XDR integer
        overflow. The packages are currently being tested.
    
        - vnc
        VNC (Virtual Network Computing) uses a weak cookie generation process
        which can be exploited by an attacker to bypass authentication.
        New packages are currently being tested and will be available on our
        FTP servers 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 
           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 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 
           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 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 "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 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:
    
        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 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.>.
    
        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.> or <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 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 <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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