SuSE Security Announcement: hylafax (SuSE-SA:2002:035)

From: Thomas Biege (thomasat_private)
Date: Mon Oct 07 2002 - 02:21:47 PDT

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    -----BEGIN PGP SIGNED MESSAGE-----
    
    ______________________________________________________________________________
    
                            SuSE Security Announcement
    
            Package:                hylafax
            Announcement-ID:        SuSE-SA:2002:035
            Date:                   Friday, Oct 4th 2002 10:30 MEST
            Affected products:      7.0, 7.1, 7.2, 7.3, 8.0
                                    SuSE Linux Connectivity Server
                                    SuSE Linux Enterprise Server
                                    SuSE Linux Office Server
            Vulnerability Type:     remote privilege escalation
            Severity (1-10):        4
            SuSE default package:   no
            Cross References:       CAN-2002-1050
    
        Content of this advisory:
            1) security vulnerability resolved:
                - format string bug in logging
                  code for TSI
                - buffer overflow in faxgetty
                  while handling image data
            2) pending vulnerabilities, solutions, workarounds:
                - glibc
                - ghostview/kghostview
                - fetchmail
                - kdelibs
                - ethereal
            3) standard appendix (further information)
    
    ______________________________________________________________________________
    
    1)  problem description, brief discussion, solution, upgrade information
    
        HylaFAX is a client-server architecture for receiving and sending
        facsimiles.
    
        The logging function of faxgetty prior version 4.1.3 was vulnerable to
        a format string bug when handling the TSI value of a received facsimile.
        This bug could easily be used to trigger a denial-of-service attack or
        to execute arbitrary code remotely.
    
        Another bug in faxgetty, a buffer overflow, can be abused by a remote
        attacker by sending a large line of image data to execute arbitrary
        commands too.
    
        Several format string bugs in local helper applications were fixed too.
        These bugs can not be exploited to gain higher privileges on a system
        running SuSE Linux because of the absence of setuid bits.
    
        The hylafax package is not installed by default.
        A temporary fix is not known.
    
        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-8.0
          ftp://ftp.suse.com/pub/suse/i386/update/8.0/n4/hylafax-4.1-285.i386.patch.rpm
          3115ebdb9e65027f35809463c5e6ae7e
        SuSE-8.0
          ftp://ftp.suse.com/pub/suse/i386/update/8.0/n4/hylafax-4.1-285.i386.rpm
          07b0f2d015b0fd83c5bb9be548e7b8fb
        source rpm:
          ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/hylafax-4.1-285.src.rpm
          8231586e2de356c737ef3d6f9d17c0ea
    
        SuSE-7.3
          ftp://ftp.suse.com/pub/suse/i386/update/7.3/n3/hylafax-4.1-284.i386.rpm
          de51bda21cc9ee1a4dd3cd06ccccf71e
        source rpm:
          ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/hylafax-4.1-284.src.rpm
          aac2ecddf06934f286960f52f2e7670e
    
        SuSE-7.2
          ftp://ftp.suse.com/pub/suse/i386/update/7.2/n3/hylafax-4.1beta2-376.i386.rpm
          275c73b0b192da9c883cfebf6638604e
        source rpm:
          ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/hylafax-4.1beta2-376.src.rpm
          b8698144b8bb859d880659fcf01eb020
    
        SuSE-7.1
          ftp://ftp.suse.com/pub/suse/i386/update/7.1/n3/hylafax-4.1beta2-375.i386.rpm
          c322bc9007191e3692341b5702b29200
        source rpm:
          ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/hylafax-4.1beta2-375.src.rpm
          4d76cd426565e411941b4aaebf6ad761
    
        SuSE-7.0
          ftp://ftp.suse.com/pub/suse/i386/update/7.0/n2/hylafax-4.1beta2-373.i386.rpm
          fa7399ce161a44dbad630928cd6b3b84
        source rpm:
          ftp://ftp.suse.com/pub/suse/i386/update/7.0/zq1/hylafax-4.1beta2-373.src.rpm
          0ac9d8b33b75f29b55a5750f17a65b93
    
    
        Sparc Platform:
    
        SuSE-7.3
          ftp://ftp.suse.com/pub/suse/sparc/update/7.3/n3/hylafax-4.1-112.sparc.rpm
          1cabb4113f858df010d305fa576c5a02
        source rpm:
          ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/hylafax-4.1-112.src.rpm
          a5ddaee97231c423e04fb71b757532a3
    
        SuSE-7.1
          ftp://ftp.suse.com/pub/suse/sparc/update/7.1/n3/hylafax-4.1beta2-218.sparc.rpm
          1449e568071f5fb6080efebb8f2a7a2b
        source rpm:
          ftp://ftp.suse.com/pub/suse/sparc/update/7.1/zq1/hylafax-4.1beta2-218.src.rpm
          bf8c780206da51bc548e9fd4264b9bfc
    
        SuSE-7.0
          ftp://ftp.suse.com/pub/suse/sparc/update/7.0/n2/hylafax-4.1beta2-218.sparc.rpm
          bb265465ea8b84ca31b5c954266daf1d
        source rpm:
          ftp://ftp.suse.com/pub/suse/sparc/update/7.0/zq1/hylafax-4.1beta2-218.src.rpm
          b5bcae601fe056f399fc8696aa156529
    
    
        AXP Alpha Platform:
    
        SuSE-7.1
          ftp://ftp.suse.com/pub/suse/axp/update/7.1/n3/hylafax-4.1beta2-245.alpha.rpm
          45d0fd7061f10e4bef9e57c42a9b160d
        source rpm:
          ftp://ftp.suse.com/pub/suse/axp/update/7.1/zq1/hylafax-4.1beta2-245.src.rpm
          baf364ec3636077fe8f810edeb111572
    
        SuSE-7.0
          ftp://ftp.suse.com/pub/suse/axp/update/7.0/n2/hylafax-4.1beta2-244.alpha.rpm
          856e96ce4a165b74e70ebc9ef3201672
        source rpm:
          ftp://ftp.suse.com/pub/suse/axp/update/7.0/zq1/hylafax-4.1beta2-244.src.rpm
          f68e2260aa36d4d218a3f3589333ea0e
    
    
        PPC Power PC Platform:
    
        SuSE-7.3
          ftp://ftp.suse.com/pub/suse/ppc/update/7.3/n3/hylafax-4.1-189.ppc.rpm
          79846b9ae0f75f8ed9b17fed07ba6263
        source rpm:
          ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/hylafax-4.1-189.src.rpm
          98a123cf18cb6b34ffd9018a76ad161f
    
        SuSE-7.1
          ftp://ftp.suse.com/pub/suse/ppc/update/7.1/n3/hylafax-4.1beta2-218.ppc.rpm
          2bfe866f1bd1d93307449de95d84d6c2
        source rpm:
          ftp://ftp.suse.com/pub/suse/ppc/update/7.1/zq1/hylafax-4.1beta2-218.src.rpm
          972c605bd3a9cc15bbbc5aa188dfc864
    
        SuSE-7.0
          ftp://ftp.suse.com/pub/suse/ppc/update/7.0/n2/hylafax-4.1beta2-217.ppc.rpm
          00b1ae1c91235ecceb287ffe7aced175
        source rpm:
          ftp://ftp.suse.com/pub/suse/ppc/update/7.0/zq1/hylafax-4.1beta2-217.src.rpm
          e905325a032854fb653cf458e0db8942
    
    ______________________________________________________________________________
    
    2)  Pending vulnerabilities in SuSE Distributions and Workarounds:
    
        - glibc
          Client applications which use res_search/res_nsreach and/or res_query()/
          res_nquery() of libresolv could trigger a DNS decoding error, a SEGV or
          leak information by reading beyond the end of a too small 'answer'
          buffer.
          The update packages are being built and tested. We will publish a security
          announcement as soon as they are ready.
    
        - ghostview/kghostview
          Bufferoverflows have recently been discovered in these packages. They
          allow attackers to execute arbitrary code with the privileges of the
          user viewing special crafted documents created by the attacker. New
          packgaes will soon be available on our ftp servers.
    
        - fetchmail
          Fetchmail contains remotely exploitable overflows in the mail header
          parsing functions. In depth discussion of these problems can be found
          at http://security.e-matters.de/advisories/032002.html.
          New packages will soon be available on our ftp servers.
    
        - kdelibs
          KDE's SSL implementation fails to check the trust chain in SSL
          certificates. This bug allows faking valid SSL certificates.
          New KDE packages will be available soon to fix this and other bugs.
    
        - ethereal
          Several potential security issues have been discovered in ethereal
          0.9.4. After this package is tested succesfuly it will be relased.
    
    ______________________________________________________________________________
    
    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 securityat_private),
           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 "buildat_private" 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-securityat_private
            -   general/linux/SuSE security discussion.
                All SuSE security announcements are sent to this list.
                To subscribe, send an email to
                    <suse-security-subscribeat_private>.
    
        suse-security-announceat_private
            -   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-subscribeat_private>.
    
        For general information or the frequently asked questions (faq)
        send mail to:
            <suse-security-infoat_private> or
            <suse-security-faqat_private> respectively.
    
        =====================================================================
        SuSE's security contact is <securityat_private> or <securityat_private>.
        The <securityat_private> 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 <securityat_private>
    pub  1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <buildat_private>
    
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    Bye,
         Thomas
    -- 
      Thomas Biege <thomasat_private>
      SuSE Linux AG,Deutschherrnstr. 15-19,90429 Nuernberg
      Function: 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
    -- 
    
      Cold silence has a tendency to atrophy any sense of compassion
                                                      - Maynard James Keenan
    



    This archive was generated by hypermail 2b30 : Mon Oct 07 2002 - 11:47:08 PDT