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

7 Oct 2002


      -----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 
       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 
       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 "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-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
                .

    For general information or the frequently asked questions (faq)
    send mail to:
         or
         respectively.

    =====================================================================
    SuSE's security contact is  or .
    The  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 
pub  1024D/9C800ACA 2000-10-19 SuSE Package Signing Key 

- -----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see http://www.gnupg.org

mQGiBDnu9IERBACT8Y35+2vv4MGVKiLEMOl9GdST6MCkYS3yEKeueNWc+z/0Kvff
4JctBsgs47tjmiI9sl0eHjm3gTR8rItXMN6sJEUHWzDP+Y0PFPboMvKx0FXl/A0d
M+HFrruCgBlWt6FA+okRySQiliuI5phwqkXefl9AhkwR8xocQSVCFxcwvwCglVcO
QliHu8jwRQHxlRE0tkwQQI0D+wfQwKdvhDplxHJ5nf7U8c/yE/vdvpN6lF0tmFrK
XBUX+K7u4ifrZlQvj/81M4INjtXreqDiJtr99Rs6xa0ScZqITuZC4CWxJa9GynBE
D3+D2t1V/f8l0smsuYoFOF7Ib49IkTdbtwAThlZp8bEhELBeGaPdNCcmfZ66rKUd
G5sRA/9ovnc1krSQF2+sqB9/o7w5/q2qiyzwOSTnkjtBUVKn4zLUOf6aeBAoV6NM
CC3Kj9aZHfA+ND0ehPaVGJgjaVNFhPi4x0e7BULdvgOoAqajLfvkURHAeSsxXIoE
myW/xC1sBbDkDUIBSx5oej73XCZgnj/inphRqGpsb+1nKFvF+rQoU3VTRSBQYWNr
YWdlIFNpZ25pbmcgS2V5IDxidWlsZEBzdXNlLmRlPohcBBMRAgAcBQI57vSBBQkD
wmcABAsKAwQDFQMCAxYCAQIXgAAKCRCoTtronIAKyl8sAJ98BgD40zw0GHJHIf6d
NfnwI2PAsgCgjH1+PnYEl7TFjtZsqhezX7vZvYCIRgQQEQIABgUCOnBeUgAKCRCe
QOMQAAqrpNzOAKCL512FZvv4VZx94TpbA9lxyoAejACeOO1HIbActAevk5MUBhNe
LZa/qM2JARUDBRA6cGBvd7LmAD0l09kBATWnB/9An5vfiUUE1VQnt+T/EYklES3t
XXaJJp9pHMa4fzFa8jPVtv5UBHGee3XoUNDVwM2OgSEISZxbzdXGnqIlcT08TzBU
D9i579uifklLsnr35SJDZ6ram51/CWOnnaVhUzneOA9gTPSr+/fT3WeVnwJiQCQ3
0kNLWVXWATMnsnT486eAOlT6UNBPYQLpUprF5Yryk23pQUPAgJENDEqeU6iIO9Ot
1ZPtB0lniw+/xCi13D360o1tZDYOp0hHHJN3D3EN8C1yPqZd5CvvznYvB6bWBIpW
cRgdn2DUVMmpU661jwqGlRz1F84JG/xe4jGuzgpJt9IXSzyohEJB6XG5+D0BiF0E
ExECAB0FAjxqqTQFCQoAgrMFCwcKAwQDFQMCAxYCAQIXgAAKCRCoTtronIAKyp1f
AJ9dR7saz2KPNwD3U+fy/0BDKXrYGACfbJ8fQcJqCBQxeHvt9yMPDVq0B0W5Ag0E
Oe70khAIAISR0E3ozF/la+oNaRwxHLrCet30NgnxRROYhPaJB/Tu1FQokn2/Qld/
HZnh3TwhBIw1FqrhWBJ7491iAjLR9uPbdWJrn+A7t8kSkPaF3Z/6kyc5a8fas44h
t5h+6HMBzoFCMAq2aBHQRFRNp9Mz1ZvoXXcI1lk1l8OqcUM/ovXbDfPcXsUVeTPT
tGzcAi2jVl9hl3iwJKkyv/RLmcusdsi8YunbvWGFAF5GaagYQo7YlF6UaBQnYJTM
523AMgpPQtsKm9o/w9WdgXkgWhgkhZEeqUS3m5xNey1nLu9iMvq9M/iXnGz4sg6Q
2Y+GqZ+yAvNWjRRou3zSE7Bzg28MI4sAAwYH/2D71Xc5HPDgu87WnBFgmp8MpSr8
QnSs0wwPg3xEullGEocolSb2c0ctuSyeVnCttJMzkukL9TqyF4s/6XRstWirSWaw
JxRLKH6Zjo/FaKsshYKf8gBkAaddvpl3pO0gmUYbqmpQ3xDEYlhCeieXS5MkockQ
1sj2xYdB1xO0ExzfiCiscUKjUFy+mdzUsUutafuZ+gbHog1CN/ccZCkxcBa5IFCH
ORrNjq9pYWlrxsEn6ApsG7JJbM2besW1PkdEoxak74z1senh36m5jQvVjA3U4xq1
wwylxadmmJaJHzeiLfb7G1ZRjZTsB7fyYxqDzMVul6o9BSwO/1XsIAnV1uuITAQY
EQIADAUCOe70kgUJA8JnAAAKCRCoTtronIAKyksiAJsFB3/77SkH3JlYOGrEe1Ol
0JdGwACeKTttgeVPFB+iGJdiwQlxasOfuXyITAQYEQIADAUCPGqpWQUJCgCCxwAK
CRCoTtronIAKyofBAKCSZM2UFyta/fe9WgITK9I5hbxxtQCfX+0ar2CZmSknn3co
SPihn1+OBNyZAQ0DNuEtBAAAAQgAoCRcd7SVZEFcumffyEwfLTcXQjhKzOahzxpo
omuF+HIyU4AGq+SU8sTZ/1SsjhdzzrSAfv1lETACA+3SmLr5KV40Us1w0UC64cwt
A46xowVq1vMlH2Lib+V/qr3b1hE67nMHjysECVx9Ob4gFuKNoR2eqnAaJvjnAT8J
/LoUC20EdCHUqn6v+M9t/WZgC+WNR8cq69uDy3YQhDP/nIan6fm2uf2kSV9A7ZxE
GrwsWl/WX5Q/sQqMWaU6r4az98X3z90/cN+eJJ3vwtA+rm+nxEvyev+jaLuOQBDf
ebh/XA4FZ35xmi+spdiVeJH4F/ubaGlmj7+wDOF3suYAPSXT2QAFEbQlU3VTRSBT
ZWN1cml0eSBUZWFtIDxzZWN1cml0eUBzdXNlLmRlPokBFQMFEDbhLUfkWLKHsco8
RQEBVw4H/1vIdiOLX/7hdzYaG9crQVIk3QwaB5eBbjvLEMvuCZHiY2COUg5QdmPQ
8SlWNZ6k4nu1BLcv2g/pymPUWP9fG4tuSnlUJDrWGm3nhyhAC9iudP2u1YQY37Gb
B6NPVaZiYMnEb4QYFcqv5c/r2ghSXUTYk7etd6SW6WCOpEqizhx1cqDKNZnsI/1X
11pFcO2N7rc6byDBJ1T+cK+F1Ehan9XBt/shryJmv04nli5CXQMEbiqYYMOu8iaA
8AWRgXPCWqhyGhcVD3LRhUJXjUOdH4ZiHCXaoF3zVPxpeGKEQY8iBrDeDyB3wHmj
qY9WCX6cmogGQRgYG6yJqDalLqrDOdmJARUDBRA24S0Ed7LmAD0l09kBAW04B/4p
WH3f1vQn3i6/+SmDjGzUu2GWGq6Fsdwo2hVM2ym6CILeow/K9JfhdwGvY8LRxWRL
hn09j2IJ9P7H1Yz3qDf10AX6V7YILHtchKT1dcngCkTLmDgC4rs1iAAl3f089sRG
BafGPGKv2DQjHfR1LfRtbf0P7c09Tkej1MP8HtQMW9hPkBYeXcwbCjdrVGFOzqx+
AvvJDdT6a+oyRMTFlvmZ83UV5pgoyimgjhWnM1V4bFBYjPrtWMkdXJSUXbR6Q7Pi
RZWCzGRzwbaxqpl3rK/YTCphOLwEMB27B4/fcqtBzgoMOiaZA0M5fFoo54KgRIh0
zinsSx2OrWgvSiLEXXYKiEYEEBECAAYFAjseYcMACgkQnkDjEAAKq6ROVACgjhDM
/3KM+iFjs5QXsnd4oFPOnbkAnjYGa1J3em+bmV2aiCdYXdOuGn4ZiQCVAwUQN7c7
whaQN/7O/JIVAQEB+QP/cYblSAmPXxSFiaHWB+MiUNw8B6ozBLK0QcMQ2YcL6+Vl
D+nSZP20+Ja2nfiKjnibCv5ss83yXoHkYk2Rsa8foz6Y7tHwuPiccvqnIC/c9Cvz
dbIsdxpfsi0qWPfvX/jLMpXqqnPjdIZErgxpwujas1n9016PuXA8K3MJwVjCqSKI
RgQQEQIABgUCOhpCpAAKCRDHUqoysN/3gCt7AJ9adNQMbmA1iSYcbhtgvx9ByLPI
DgCfZ5Wj+f7cnYpFZI6GkAyyczG09sE=
=LRKC
- -----END PGP PUBLIC KEY BLOCK-----


-----BEGIN PGP SIGNATURE-----
Version: 2.6.3in
Charset: noconv

iQEVAwUBPZ2QC3ey5gA9JdPZAQES0gf/Un5d3SHgL+xDlFaseqLg6t7NHa1d4KRw
ZM8eqLE+ClFpfq+o/Rf97DqAaQZYrvUYzleOUUcvci2BLevCFMbqBsRxBc0FvU7G
lvxgJkjslnlBxjAgkvXp/DmEcYN3sVH/4f8eLtq+cUb4AwU01elI7mThE6l3n6P6
Xq2q4NdWnw1RAXmsgfjNkRuX5gNUgULRUYFFlQF/ycKleoml/DQCH7dBet9tBQQP
jem58hBq2cnQmTG2GyFFs0fsb81PCfxk0LrrxveKoMHR/cgH/y2sOBCu01bEzBBe
HhpZPhgOcO1CxijXuEufaPbufXN5d/L2gHJpQK54L7Oc6n8zsDLXmg==
=7yxm
-----END PGP SIGNATURE-----

Bye,
     Thomas
-- 
  Thomas Biege 
  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