SUSE Security Announcement: pcre integer overflows (SUSE-SA:2005:048)

30 Aug 2005

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______________________________________________________________________________

                        SUSE Security Announcement

        Package:                pcre
        Announcement ID:        SUSE-SA:2005:048
        Date:                   Tue, 30 Aug 2005 15:00:00 +0000
        Affected Products:      9.0, 9.1, 9.2, 9.3
                                SUSE Linux Desktop 1.0
                                SUSE Linux Enterprise Server 8, 9
                                Novell Linux Desktop 9
        Vulnerability Type:     remote code execution
        Severity (1-10):        6
        SUSE Default Package:   yes
        Cross-References:       CAN-2005-2491

    Content of This Advisory:
        1) Security Vulnerability Resolved:
             pcre integer overflow security problem
           Problem Description
        2) Solution or Work-Around
        3) Special Instructions and Notes
        4) Package Location and Checksums
        5) Pending Vulnerabilities, Solutions, and Work-Arounds:
            none
        6) Authenticity Verification and Additional Information

______________________________________________________________________________

1) Problem Description and Brief Discussion

   A vulnerability was found in the PCRE regular expression handling
   library which allows an attacker to crash or overflow a buffer in the
   program by specifying a special regular expression.

   Since this library is used in a large number of packages, including
   apache2, php4, exim, postfix and similar, a remote attack could be
   possible.

   This is tracked by the Mitre CVE ID CAN-2005-2491.

2) Solution or Work-Around

   Install the updated packages.

3) Special Instructions and Notes

   Please make sure you restart services linked against the pcre library (apache, exim, postfix).

4) Package Location and Checksums

   The preferred method for installing security updates is to use the YaST
   Online Update (YOU) tool. YOU detects which updates are required and
   automatically performs the necessary steps to verify and install them.
   Alternatively, download the update packages for your distribution manually
   and verify their integrity by the methods listed in Section 6 of this
   announcement. Then install the packages using the command

     rpm -Fhv <file.rpm>

   to apply the update, replacing <file.rpm> with the filename of the
   downloaded RPM package.

   Our maintenance customers are notified individually. The packages are
   offered for installation from the maintenance web.

   x86 Platform:

   SUSE Linux 9.3:
   ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/i586/pcre-5.0-3.2.i586.rpm
          ccc4711c80659d57a7d06754d577a33c
   ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/i586/pcre-devel-5.0-3.2.i586.rpm
          18ad1553287682ad09b2412dd038c5c5
   ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/x86_64/pcre-32bit-9.3-7.1.x86_64.rpm
          0246d39b1aa7bbfa8872a4f841d2842f

   SUSE Linux 9.2:
   ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/pcre-4.5-2.2.i586.rpm
          d1c4af6faceecbbc028c5c5b32cd46bd
   ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/pcre-devel-4.5-2.2.i586.rpm
          276ecc193b12cf20e5ac1e2be2e9484c
   ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/x86_64/pcre-32bit-9.2-200508260320.x86_64.rpm
          107c8c3ac5218348e89cc5d6a235f34d

   SUSE Linux 9.1:
   ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/pcre-4.4-109.4.i586.rpm
          0330a3dd845c33bd460851e13abdcb01
   ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/pcre-devel-4.4-109.4.i586.rpm
          ca1722d18e465cce1e6be5fc69a97586
   ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/i586/pcre-32bit-9.1-200508261306.i586.rpm
          2933451df49a408b53d9d2628fd74d38
   source rpm(s):
   ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/src/pcre-4.4-109.4.src.rpm
          131e5f816d7f9e6e8536416e574a2e07

   SUSE Linux 9.0:
   ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/pcre-4.4-112.i586.rpm
          7f6492b3fdd2e9cf9ff104c7ef366fd2
   ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/pcre-devel-4.4-112.i586.rpm
          c1e36f246764869a672f3e69c879a976
   ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/i586/pcre-32bit-9.0-5.i586.rpm
          7e4d12f5af0bc2a68d21a8d72ccb1d37
   source rpm(s):
   ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/src/pcre-4.4-112.src.rpm
          367ad88cdd0c0ec060992312e96a9997

   x86-64 Platform:

   SUSE Linux 9.3:
   ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/x86_64/pcre-5.0-3.2.x86_64.rpm
          36c7d2b3713c27c79292a7637443a285
   ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/x86_64/pcre-devel-5.0-3.2.x86_64.rpm
          db8e83e2867c3d2f713a43705b655ffe
   source rpm(s):
   ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/src/pcre-5.0-3.2.src.rpm
          b4d17fa6f1f4359196b04495a7d6fb19

   SUSE Linux 9.2:
   ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/x86_64/pcre-4.5-2.2.x86_64.rpm
          dcaeeb4225fb820c85927dd2104c9f9f
   ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/x86_64/pcre-devel-4.5-2.2.x86_64.rpm
          bcbcb9ec334e1a8896ca29b3c10a5a72
   source rpm(s):
   ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/src/pcre-4.5-2.2.src.rpm
          096c4732ffd1c34e424ee62b86fcb741

   SUSE Linux 9.1:
   ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/pcre-4.4-109.4.x86_64.rpm
          167f6794525cdb24cc6d0fe16c7d3baf
   ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/pcre-devel-4.4-109.4.x86_64.rpm
          a1a105c4c60d7c2e0745d6d81b24afef
   source rpm(s):
   ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/src/pcre-4.4-109.4.src.rpm
          4186754b93b1e2856d2dbb83be5fb6f5

   SUSE Linux 9.0:
   ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/pcre-4.4-112.x86_64.rpm
          0884bc87e09d1607e80d98ab7c898549
   ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/pcre-devel-4.4-112.x86_64.rpm
          a336cf08fe6b8e4818480304bd63cfb6
   source rpm(s):
   ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/src/pcre-4.4-112.src.rpm
          308b513ff579695f0292b881d7022f8f

______________________________________________________________________________

5) Pending Vulnerabilities, Solutions, and Work-Arounds:

   none
______________________________________________________________________________

6) Authenticity Verification and Additional Information

  - Announcement authenticity verification:

    SUSE security announcements are published via mailing lists and on Web
    sites. The authenticity and integrity of a SUSE security announcement is
    guaranteed by a cryptographic signature in each announcement. All SUSE
    security announcements are published with a valid signature.

    To verify the signature of the announcement, save it as text into a file
    and run the command

      gpg --verify <file>

    replacing <file> with the name of the file where you saved the
    announcement. The output for a valid signature looks like:

      gpg: Signature made <DATE> using RSA key ID 3D25D3D9
      gpg: Good signature from "SuSE Security Team <security@suse.de>"

    where <DATE> is replaced by the date the document was signed.

    If the security team's key is not contained in your key ring, you can
    import it from the first installation CD. To import the key, use the
    command

      gpg --import gpg-pubkey-3d25d3d9-36e12d04.asc

  - Package authenticity verification:

    SUSE update packages are available on many mirror FTP servers all over the
    world. While this service is considered valuable and important to the free
    and open source software community, the authenticity and the integrity of
    a package needs to be verified to ensure that it has not been tampered
    with.

    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) Using the internal gpg signatures of the rpm package
    2) MD5 checksums as provided in this announcement

    1) The internal 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, replacing <file.rpm> with the
       filename of the RPM package downloaded. The package is unmodified if it
       contains a valid signature from build@suse.de with the key ID 9C800ACA.

       This key is automatically imported into the RPM database (on
       RPMv4-based distributions) and the gpg key ring of 'root' during
       installation. You can also find it on the first installation CD and at
       the end of this announcement.

    2) If you need an alternative means of verification, use the md5sum
       command to verify the authenticity of the packages. Execute the command

         md5sum <filename.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
       SUSE security announcement. Because the announcement containing the
       checksums is cryptographically signed (by security@suse.de), the
       checksums show proof of the authenticity of the package if the
       signature of the announcement is valid. Note that the md5 sums
       published in the SUSE Security Announcements are valid for the
       respective packages only. Newer versions of these packages cannot be
       verified.

  - SUSE runs two security mailing lists to which any interested party may
    subscribe:

    suse-security@suse.com
        -   General Linux and SUSE security discussion.
            All SUSE security announcements are sent to this list.
            To subscribe, send an e-mail to
                <suse-security-subscribe@suse.com>.

    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 e-mail 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>.

    =====================================================================
    SUSE's security contact is <security@suse.com> or <security@suse.de>.
    The <security@suse.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, the
    clear text signature should show proof of the authenticity of the text.

    SUSE Linux Products GmbH provides 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@suse.de>
pub  1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <build@suse.de>

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Marcus Meissner

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