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SuSE: php4, mod_php4 remote code execution Print E-mail
User Rating:      How can I rate this item?
Posted by Joe Shakespeare   
SuSE Stefan Esser and Marcus Boerger found several buffer overflow problems in the unserializer functions of PHP (CAN-2004-1019) and Ilia Alshanetsky (CAN-2004-1065) found one in the exif parser. Any of them could allow remote attackers to execute arbitrary code as the user running the PHP interpreter.

______________________________________________________________________________

                        SUSE Security Announcement

        Package:                php4, mod_php4
        Announcement-ID:        SUSE-SA:2005:002
        Date:                   Monday, Jan 17th 2005 18:00 MEST
        Affected products:      8.1, 8.2, 9.0, 9.1, 9.2
                                SUSE Linux Enterprise Server 8, 9
        Vulnerability Type:     remote code execution
        Severity (1-10):        7
        SUSE default package:   no
        Cross References:       CAN-2004-1019
                                CAN-2004-1065
                                http://bugs.php.net/bug.php?id=25753

    Content of this advisory:
        1) security vulnerability resolved:
             - buffer overflows in PHP
             - PHP source code disclosure
           problem description
        2) solution/workaround
        3) special instructions and notes
        4) package location and checksums
        5) pending vulnerabilities, solutions, workarounds:
        6) standard appendix (further information)

______________________________________________________________________________

1) problem description, brief discussion

    PHP is a well known, widely-used scripting language often used within web
    server setups.

    Stefan Esser and Marcus Boerger found several buffer overflow problems in
    the unserializer functions of PHP (CAN-2004-1019) and Ilia Alshanetsky
    (CAN-2004-1065) found one in the exif parser. Any of them could allow
    remote attackers to execute arbitrary code as the user running the PHP
    interpreter.

    Additionally a bug where the server would disclose php sourcecode under
    some circumstances has been fixed.

2) solution/workaround

    There is no workaround known besides disabling PHP. Therefore we recommend
    to install the updated packages.

3) special instructions and notes

    If you use php as module within apache you have to restart the server by
    executing the following command as root:

         /usr/sbin/rcapache restart

    or if you use the apache2 server

         /usr/sbin/rcapache2 restart

4) package location and checksums

    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 for installation from the maintenance web.

    x86 Platform:

    SUSE Linux 9.2:
    ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/php4-4.3.8-8.3.i586.rpm
      e871c76bb7c0ba1fc34268e05ee54e94
    ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/apache2-mod_php4-4.3.8-8.3.i586.rpm
      e9e0e5cbfa8805b6a5866cd91db1e715
    patch rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/php4-4.3.8-8.3.i586.patch.rpm
      7bc595dd946b7287c1b590283526500b
    ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/apache2-mod_php4-4.3.8-8.3.i586.patch.rpm
      e72c58f0d9fbb9d7b0e23251f50b22c5
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/src/php4-4.3.8-8.3.src.rpm
      e80aff98a2d6bdcb56bf6ed7e1731611

    SUSE Linux 9.1:
    ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/php4-4.3.4-43.22.i586.rpm
      01ddb36914f644c65165250b7c7689e8
    ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/apache2-mod_php4-4.3.4-43.22.i586.rpm
      9a3db7a8dcc0e5d6b49911d25e755069
    ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/mod_php4-core-4.3.4-43.22.i586.rpm
      c072a97d0081976292d4d5005019dccd
    patch rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/php4-4.3.4-43.22.i586.patch.rpm
      01853c982ea0c89faecfe3fb568313b6
    ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/apache2-mod_php4-4.3.4-43.22.i586.patch.rpm
      dd64ede42cf3a31a99df2e90ebb597a1
    ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/mod_php4-core-4.3.4-43.22.i586.patch.rpm
      d499fac997192f14e949398df2624a9d
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/src/php4-4.3.4-43.22.src.rpm
      7f23c05761153fec8786c9261e60a49a

    SUSE Linux 9.0:
    ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/mod_php4-4.3.3-183.i586.rpm
      bbf8be6995d2590af1e2a5d12d101ba6
    ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/apache2-mod_php4-4.3.3-183.i586.rpm
      d8c08e3e05104d0a291cc1b98111c3a1
    ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/mod_php4-core-4.3.3-183.i586.rpm
      cb01290bc7c2b968eacea15114033ad4
    patch rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/mod_php4-4.3.3-183.i586.patch.rpm
      d69e6d3885258f06059f0c8cc4b3fc95
    ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/apache2-mod_php4-4.3.3-183.i586.patch.rpm
      1d8029716edec5d69b9e9f54d2b311df
    ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/mod_php4-core-4.3.3-183.i586.patch.rpm
      a9d2199cb9d2ddb904a723d0a6107300
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/src/mod_php4-4.3.3-183.src.rpm
      59f6c6664cad5ded05ce4b22d856d496

    SUSE Linux 8.2:
    ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/mod_php4-4.3.1-174.i586.rpm
      5a477c5733f83b776f746bc3431d8207
    ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/apache2-mod_php4-4.3.1-174.i586.rpm
      90eb5f5d40142d7d34a3b46c5ce87ac8
    ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/mod_php4-core-4.3.1-174.i586.rpm
      f55cf3b586c8a921700e8ecfb8ad5941
    patch rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/mod_php4-4.3.1-174.i586.patch.rpm
      e6c583ddaa03bd85729c46d9ddfc75dd
    ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/apache2-mod_php4-4.3.1-174.i586.patch.rpm
      3053986191c3dd2354b931ea31fc9208
    ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/mod_php4-core-4.3.1-174.i586.patch.rpm
      7a8d67f1e02ea516f21df3ad69107b00
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/src/mod_php4-4.3.1-174.src.rpm
      1d709df9d796d6f723590bc31afe9b18

    SUSE Linux 8.1:
    ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/mod_php4-4.2.2-485.i586.rpm
      f597d7af4c5c3eb3fa74ead654ac79e3
    ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/mod_php4-core-4.2.2-485.i586.rpm
      136007f47679877b999eeee170bc0003
    patch rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/mod_php4-4.2.2-485.i586.patch.rpm
      07b674f1ec878bbb6ee68e6da52144d4
    ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/mod_php4-core-4.2.2-485.i586.patch.rpm
      30c83209b3e7177f9ac34365f51f9c72
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/mod_php4-4.2.2-485.src.rpm
      e6a23b4c8cbba800d002104da80fbc17



    x86-64 Platform:

    SUSE Linux 9.2:
    ftp://ftp.suse.com/pub/suse/x86_64/update/9.2/rpm/x86_64/php4-4.3.8-8.3.x86_64.rpm
      96c10340cd1e9dbd499ceb264ff6862b
    ftp://ftp.suse.com/pub/suse/x86_64/update/9.2/rpm/x86_64/apache2-mod_php4-4.3.8-8.3.x86_64.rpm
      0650c7390f4b341ad496030e6d7c7585
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/x86_64/update/9.2/rpm/src/php4-4.3.8-8.3.src.rpm
      e80aff98a2d6bdcb56bf6ed7e1731611

    SUSE Linux 9.1:
    ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/php4-4.3.4-43.22.x86_64.rpm
      d7b5bd55bd381bbf674ad9111e336741
    ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/apache2-mod_php4-4.3.4-43.22.x86_64.rpm
      0b8d4a5de7c53fef7364ef2883269c95
    ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/mod_php4-core-4.3.4-43.22.x86_64.rpm
      f973f7d09700571dca8221aaffa8a74b
    patch rpm(s):
    ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/php4-4.3.4-43.22.x86_64.patch.rpm
      cf568e895d1b4e79ba0a87c3ddfa68fe
    ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/apache2-mod_php4-4.3.4-43.22.x86_64.patch.rpm
      d74c95e6d64ab16ebd8b0bfc1bfda08f
    ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/mod_php4-core-4.3.4-43.22.x86_64.patch.rpm
      12c7794749389feaec02b707da12c4d4
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/src/php4-4.3.4-43.22.src.rpm
      61ae620d5e5bb9c6ebb53c77fdd2f0ee

    SUSE Linux 9.0:
    ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/mod_php4-4.3.3-183.x86_64.rpm
      42ddc755c8a14eda9a2e7527e1c6ab83
    ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/apache2-mod_php4-4.3.3-183.x86_64.rpm
      96cf0ad7d9dd5faed47a81619a3f11e9
    ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/mod_php4-core-4.3.3-183.x86_64.rpm
      a4af66488b211562da363b342c80fabd
    patch rpm(s):
    ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/mod_php4-4.3.3-183.x86_64.patch.rpm
      564fc4425ba3d8c995836b61c93082f9
    ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/apache2-mod_php4-4.3.3-183.x86_64.patch.rpm
      67580deaea8aed5c1f6af1c8fb5f7889
    ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/mod_php4-core-4.3.3-183.x86_64.patch.rpm
      bfe305060c4ca74d88b8503996a953ae
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/src/mod_php4-4.3.3-183.src.rpm
      e1f76b408a70416b1e80dd2fb8f6721a

______________________________________________________________________________

5) Pending vulnerabilities in SUSE Distributions and Workarounds:

    Please read our weekly summary report for more information.

______________________________________________________________________________

6) 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 recommend against subscribing to security lists that cause the
       e-mail 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
       file name of the rpm package that you have downloaded. Of course,
       package authenticity verification can only target an uninstalled 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.

 
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