SuSE Security Announcement: apache

7 Sep 2000


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______________________________________________________________________________

                        SuSE Security Announcement

        Package:                apache
        Date:                   Thursday, September 7th, 2000 20:00 MEST
        Affected SuSE versions: 6.1, 6.2, 6.3, 6.4, 7.0
        Vulnerability Type:     remote file viewing
        Severity (1-10):        2
        SuSE default package:   yes
        Other affected systems: none, as of the release date of this advisory

    Content of this advisory:
        1) security vulnerability resolved: apache
           problem description, discussion, solution and upgrade information
        2) credits: @stake
        3) standard appendix (further information)

<p>______________________________________________________________________________

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

    The default package selection in SuSE distributions includes apache.
    The configuration file that comes with the package contains two 
    security relevant errors:

    a) Starting in SuSE-6.0, a section in apache's configuration file 
    /etc/httpd/httpd.conf reads
        Alias /cgi-bin-sdb/ /usr/local/httpd/cgi-bin/
    This allows remote users to read the cgi script sources of the server,
    located in /usr/local/httpd/cgi-bin/.

    b) Starting with SuSE-6.3, the distribution comes with the apache module
    WebDAV. It is contained in a seperate package, named mod_dav, and it
    is installed if selected by hand or if a network server configuration 
    has been selected in the installation process. mod_dav is not contained
    in the default package selection. WebDAV stands for "Web-based 
    Distributed Authoring and Versioning" and allows users to 
    collaboratively edit and manage files on remote web servers (see 
    http://www.webdav.org/ for further details!).
    If WebDAV is installed, apache will automatically run with the module
    activated. Opposing the recommendations on the WebDAV homepage under
    http://www.webdav.org/mod_dav/#security, there is no access control or
    authentification activated. This should most definitely be considered 
    a security problem. 
    The overall policy wrt activating an installed package will adopt to this 
    conclusion in future releases of the SuSE Linux distribution.

    Problem a) and b) can be easily solved by changing the relevant parts
    of apache's configuration file /etc/httpd/httpd.conf:

    a) Change "Alias /cgi-bin-sdb/ /usr/local/httpd/cgi-bin/" to read:
        "ScriptAlias /cgi-bin-sdb/ /usr/local/httpd/cgi-bin/"
    Then, restart apache: `/sbin/init.d/apache restart'

    b) Change "DAV On" to read: "DAV Off". This removes the problem, 
    regardless of the package being installed or not. Alternatively, 
    you may wish to remove the mod_dav package using the command 
    `rpm -e mod_dav'.
    Then, restart apache: `/sbin/init.d/apache restart'

    SuSE strongly recommends to have these changes applied as soon as
    possible. In addition, SuSE provides an update for the vulnerable
    misconfigured packages for the case that the admin of a SuSE Linux
    machine did not change the configuration file yet.

    Download the update package from locations desribed below and install 
    the package with the command `rpm -Fhv file.rpm'. The md5sum for each
    file is in the line below. You can verify the integrity of the rpm
    files using the command
        `rpm --checksig --nogpg file.rpm',
    independently from the md5 signatures below.

<p>    i386 Intel Platform:

    SuSE-7.0
    ftp://ftp.suse.com/pub/suse/i386/update/7.0/n1/apache-1.3.12-107.i386.rpm
      65bac933de7676ad3d8f63b32c608dad
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/7.0/zq1/apache-1.3.12-107.nosrc.rpm
      5b0f9ce9b5e2c3a45356fcd9cdff07ba

    SuSE-6.4
    ftp://ftp.suse.com/pub/suse/i386/update/6.4/n1/apache-1.3.12-107.i386.rpm
      a4bea77974c9d300ac13698e6f9812eb
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/6.4/zq1/apache-1.3.12-107.nosrc.rpm
      39cf311c44bc760159c711c7ec97685f

    SuSE-6.3
    ftp://ftp.suse.com/pub/suse/i386/update/6.3/n1/apache-1.3.9-70.i386.rpm
      87d7a6426857e6f3afcf991c273fc1a5
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/6.3/zq1/apache-1.3.9-70.nosrc.rpm
      ab81b76d0c4e6c765b77a69fd4143620

    SuSE-6.2
    ftp://ftp.suse.com/pub/suse/i386/update/6.2/n1/apache-1.3.6-52.i386.rpm
      d7c513bb4aad15a9f3dfb11ff1302405
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/6.2/zq1/apache-1.3.6-52.nosrc.rpm
      bdabbdf7df648c3b4b8c5fd031e65cfc

    SuSE-6.1
    ftp://ftp.suse.com/pub/suse/i386/update/6.1/n1/apache-1.3.6-53.i386.rpm
      db40e37d1931fb4e5830358b37acee5e
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/6.1/zq1/apache-1.3.6-53.nosrc.rpm
      8ad785cb5f16456b8540982f1175b0b0

    SuSE-6.0
    Please use the update packages from the 6.1 directory for SuSE-6.0!

<p>    Sparc Platform:

    SuSE-7.0
    ftp://ftp.suse.com/pub/suse/sparc/update/7.0/n1/apache-1.3.12-109.sparc.rpm
      66f87cb2100960ee72ae1110fa077424
    source rpm:
    ftp://ftp.suse.com/pub/suse/sparc/update/7.0/zq1/apache-1.3.12-109.nosrc.rpm
      fff4bd1d37a7e9d430e8a60898865567

<p>    AXP Alpha Platform:

    SuSE-6.4
    The update packages will be available soon at the usual location 
    ftp://ftp.suse.com/pub/suse/axp/update/6.4/n1/ .
    Until then, please correct the configuration file by hand as 
    described above.

    SuSE-6.3
    The update packages will be available soon at the usual location 
    ftp://ftp.suse.com/pub/suse/axp/update/6.3/n1/ .
    Until then, please correct the configuration file by hand as 
    described above.

    SuSE-6.1
    ftp://ftp.suse.com/pub/suse/axp/update/6.1/n1/apache-1.3.6-43.alpha.rpm
      eaca8f06c54c669d60f6a06fbe7301dc
    source rpm:
    ftp://ftp.suse.com/pub/suse/axp/update/6.1/zq1/apache-1.3.6-43.nosrc.rpm
      2227de2e6d5faf268413cd474175d126

<p>    PPC Power PC Platform:

    SuSE-6.4
    ftp://ftp.suse.com/pub/suse/ppc/update/6.4/n1/apache-1.3.12-108.ppc.rpm
      0c830d4d33f2bac33d6a44ab0efc34e7
    source rpm:
    ftp://ftp.suse.com/pub/suse/ppc/update/6.4/zq1/apache-1.3.12-108.nosrc.rpm
      f5fd7575d67e369f87fb2e5c47b61eaf

    SuSE-6.3
    The update packages will be available soon at the usual location 
    ftp://ftp.suse.com/pub/suse/ppc/update/6.3/n1/ .
    Until then, please correct the configuration file by hand as 
    described above.

______________________________________________________________________________

2)  Credits:

    SuSE would like to express its sincere appreciation for the efforts 
    and the working style of the Cerberus Security Team/@Stake Inc., in 
    particular to mnemonix (David Litchfield <dlitchfield@atstake.com>) 
    and to weld <weld@atstake.com>.
    Have a look at their website at http://www.atstake.com/ for further
    information.
______________________________________________________________________________

3)  standard appendix:

    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-subscribe@suse.com>.

    suse-security-announce@suse.com
        -   SuSE's announce-only mailing list.
            Only SuSE's security annoucements are sent to this list.
            To subscribe, send an email to
                <suse-security-announce-subscribe@suse.com>.

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

    ===============================================
    SuSE's security contact is <security@suse.com>.
    ===============================================

Regards,
Roman Drahtmüller.
- - -- 
 -                                                                      -
| Roman Drahtmüller      <draht@suse.de> //          "Caution: Cape does |
  SuSE GmbH - Security           Phone: //       not enable user to fly."
| Nürnberg, Germany     +49-911-740530 // (Batman Costume warning label) |
 -                                                                      -
______________________________________________________________________________

    The information in this advisory may be distributed or reproduced,
    provided that the advisory is not modified in any way.
    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  2048/3D25D3D9 1999/03/06 SuSE Security Team <security@suse.de>

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draht＠suse.de

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