Message-ID: <Pine.LNX.4.33.0303131704110.8447-100000@wotan.suse.de>
Date: Thu, 13 Mar 2003 17:04:38 +0100 (CET)
From: Thomas Biege <thomas@...e.de>
To: <bugtraq@...urityfocus.com>
Subject: SuSE Security Announcement: lprold (SuSE-SA:2003:0014)



Republished because of a mistake. Thanks to an attentive user.

-----BEGIN PGP SIGNED MESSAGE-----

______________________________________________________________________________

                        SuSE Security Announcement

        Package:                lprold
        Announcement-ID:        SuSE-SA:2003:0014
        Date:                   Thursday, Mar 13th 2003 16:58 MET
        Affected products:      7.1, 7.2, 7.3
                                SuSE eMail Server 3.1
                                SuSE eMail Server III
                                SuSE Firewall Adminhost VPN
                                SuSE Linux Admin-CD for Firewall
                                SuSE Firewall on CD 2 - VPN
                                SuSE Firewall on CD 2
                                SuSE Linux Enterprise Server for S/390
                                SuSE Linux Connectivity Server
                                SuSE Linux Enterprise Server 7
                                SuSE Linux Office Server
        Vulnerability Type:     local privilege escalation
        Severity (1-10):        3
        SuSE default package:   yes
        Cross References:

    Content of this advisory:
        1) security vulnerability resolved: buffer overflow in lprm
           problem description, discussion, solution and upgrade information
        2) pending vulnerabilities, solutions, workarounds:
            - ethereal
            - qpopper
            - XFree4
            - sendmail
            - apcupsd
            - snort
            - file
            - zlib
            - vnc
        3) standard appendix (further information)

______________________________________________________________________________

1)  problem description, brief discussion, solution, upgrade information

    The lprm command of the printing package lprold shipped till SuSE 7.3
    contains a buffer overflow. This buffer overflow can be exploited by
    a local user, if the printer system is set up correctly, to gain root
    privileges.
    lprold is installed as default package and has the setuid bit set.

    As a temporary workaround you can disable the setuid bit of lprm by
    executing the following tasks as root:
      - add "/usr/bin/lprm  root.root 755" to /etc/permissions.local
      - run 'chkstat -set /etc/permissions.local'
    Another way would be to just allow trusted users to run lprm by
    executing the following tasks as root:
      - add "/usr/bin/lprm  root.trusted 4750" to /etc/permissions.local
      - run 'chkstat -set /etc/permissions.local'

    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.

    Intel i386 Platform:



    SuSE-7.3:
    ftp://ftp.suse.com/pub/suse/i386/update/7.3/n1/lprold-3.0.48-408.i386.rpm
      52a301d88fce69dcf2de53c86d70f51e
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/lprold-3.0.48-408.src.rpm
      9907cc1bd077493d0bb1a0e646a20022

    SuSE-7.2:
    ftp://ftp.suse.com/pub/suse/i386/update/7.2/n1/lprold-3.0.48-407.i386.rpm
      364faa0d5266e36d7db90ac223137f2d
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/lprold-3.0.48-407.src.rpm
      eff9c0ff34e0ad0d313477b998964a26

    SuSE-7.1:
    ftp://ftp.suse.com/pub/suse/i386/update/7.1/n1/lprold-3.0.48-407.i386.rpm
      5454e913e660a6d409a200a3ddd19f8b
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/lprold-3.0.48-407.src.rpm
      ad22928b988b8ed055ab5698e15479e4



    Sparc Platform:

    SuSE-7.3:
    ftp://ftp.suse.com/pub/suse/sparc/update/7.3/n1/lprold-3.0.48-273.sparc.rpm
      88a5f8cf7db0c123776b4fa9f47e9205
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/lprold-3.0.48-273.src.rpm
      83860e8bd337b3617f8c59605c8ff847




    AXP Alpha Platform:

    SuSE-7.1:
    ftp://ftp.suse.com/pub/suse/axp/update/7.1/n1/lprold-3.0.48-270.alpha.rpm
      651c6141e07560763f07b74c1506d668
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/axp/update/7.1/zq1/lprold-3.0.48-270.src.rpm
      96b67fb75ae0c4702f6e881c665f81dd



    PPC Power PC Platform:

    SuSE-7.3:
    ftp://ftp.suse.com/pub/suse/ppc/update/7.3/n1/lprold-3.0.48-297.ppc.rpm
      8caba2cc70f7edfa96c23ac3bab3e8bf
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/lprold-3.0.48-297.src.rpm
      b1741e591445aef7b8aaf83a8a4a34ef

    SuSE-7.1:
    ftp://ftp.suse.com/pub/suse/ppc/update/7.1/n1/lprold-3.0.48-297.ppc.rpm
      1b86cd16e6e5b8e63252b9c9a6acd5b9
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/ppc/update/7.1/zq1/lprold-3.0.48-297.src.rpm
      e44adcc90b604bc4dc81b43e57f6e161




______________________________________________________________________________

2)  Pending vulnerabilities in SuSE Distributions and Workarounds:

    - ethereal
      A format string bug in ethereal's SOCKS handling code and a buffer
      overflow in the NTLMSSP was found in ethereal. Both bugs may lead
      to remote system compromise.
      New packages are currently being build and will be available soon.

    - qpopper
      In version 4.0.x of qpopper a buffer overflow *after* user authen-
      tication can be exploited to gain a shell on a POP-server machine.
      New packages are currently being build and will be available soon.

    - XFree4
      A buffer overflow in the Xlib code can be triggered while handling
      the environment variable XLOCALEDIR. The X version affected is 4.2.0
      (SuSE Linux 8.0 and 8.1).
      We still investigate this issue.

    - sendmail
      A correction is necessary to the last SuSE Security Announcement
      (SuSE-SA:2003:013) about sendmail: The Vulnerability Type must read
      remote buffer overflow.

    - apcupsd
      The control and management daemon for APC UPS systems is vulnerable
      to remote code execution due to buffer overflow and format string bugs.
      A dedicated advisory for this issue will be released as soon as all
      packages are build.

    - snort
      snort, a sensor-based Network Intrusion Detection System, was
      vulnerable to a buffer overflow in it's RPC preprocessor.
      As a workaround the following line in snort.conf should be commented
      out and snort should be restarted to disable the RPC-preprocessor:
        preprocessor rpc_decode: 111 32771
      Future version of SuSE Linux will be shipped with a fixed snort
      package.

    - file
      A locally exploitable buffer overflow was found in the file command.
      New packages are currently being build and will be available soon.

    - zlib
      zlib's function gzprintf() is prone to a buffer overflow if its
      arguments expand to more then Z_PRINTF_BUFSIZE bytes.
      A fixed version of zlib will be shipped with future SuSE Linux
      versions.

    - 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 <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@...e.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 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@...e.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@...e.com
        -   general/linux/SuSE security discussion.
            All SuSE security announcements are sent to this list.
            To subscribe, send an email to
                <suse-security-subscribe@...e.com>.

    suse-security-announce@...e.com
        -   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-subscribe@...e.com>.

    For general information or the frequently asked questions (faq)
    send mail to:
        <suse-security-info@...e.com> or
        <suse-security-faq@...e.com> respectively.

    =====================================================================
    SuSE's security contact is <security@...e.com> or <security@...e.de>.
    The <security@...e.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 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 <security@...e.de>
pub  1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <build@...e.de>

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Bye,
     Thomas
-- 
  Thomas Biege <thomas@...e.de>
  SuSE Linux AG,Deutschherrnstr. 15-19,90429 Nuernberg
  Function: Security Support & Auditing
  "lynx -source http://www.suse.de/~thomas/contact/thomas.asc | gpg --import"
  Key fingerprint = 7254 B15D B3C4 943F 485E  0BBD 8ECC D7CB C200 A213

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