[Full-disclosure] SUSE Security Announcement: apache, apache2 request smuggling problem (SUSE-SA:2005:046)

From: Marcus Meissner (meissner_at_suse.de)
Date: 08/16/05

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Date: Tue, 16 Aug 2005 10:46:06 +0200
To: full-disclosure@lists.grok.org.uk

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

______________________________________________________________________________

SUSE Security Announcement

        Package: apache,apache2
        Announcement ID: SUSE-SA:2005:046
        Date: Tue, 16 Aug 2005 07:00:00 +0000
        Affected Products: 8.2, 9.0, 9.1, 9.2, 9.3
                                SUSE Linux Enterprise Server 8, 9
        Vulnerability Type: authentication bypass
        Severity (1-10): 6
        SUSE Default Package: no
        Cross-References: CAN-2005-2088
                                CAN-2005-1268

    Content of This Advisory:
        1) Security Vulnerability Resolved:
             apache and apache2 request smuggling
           Problem Description
        2) Solution or Work-Around
        3) Special Instructions and Notes
        4) Package Location and Checksums
        5) Pending Vulnerabilities, Solutions, and Work-Arounds:
            See SUSE Security Summary Report.
        6) Authenticity Verification and Additional Information

______________________________________________________________________________

1) Problem Description and Brief Discussion

   A security flaw was found in the Apache and Apache2 web servers which
   allows remote attacker to "smuggle" requests past filters by providing
   handcrafted header entries.

Fixed Apache 2 server packages were released on July 26th,
fixed Apache 1 server packages were released on August 15th.

This issue is tracked by the Mitre CVE ID CAN-2005-2088.

The Apache2 packages additionally fix a single byte overflow in the SSL
CRL handling functionality, tracked by the Mitre CVE ID CAN-2005-1268.

The Apache1 packages additionally fix a harmless local buffer overflow
in htpasswd.

2) Solution or Work-Around

None, please install the updated packages.

3) Special Instructions and Notes

Please restart the Apache web server after the update.

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/apache2-2.0.53-9.2.i586.rpm
          f139e14297b5e62c297bdeeb91a72cfb
   ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/i586/apache2-prefork-2.0.53-9.2.i586.rpm
          f3b91a27ce46603221423ce450f64b91
   ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/i586/apache2-worker-2.0.53-9.2.i586.rpm
          8085487fab1bd301013e4f4268cd5515

   SUSE Linux 9.2:
   ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/apache2-2.0.50-7.4.i586.rpm
          3bcb58b4cfb08896be787bb62328197c
   ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/apache2-prefork-2.0.50-7.4.i586.rpm
          1e520e3c81f6b7ec84bb4127f9c0ec52
   ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/apache2-worker-2.0.50-7.4.i586.rpm
          ff8b691c1d44e33ef43f46f0bd2e9016

x86-64 Platform:

   SUSE Linux 9.3:
   ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/x86_64/apache2-2.0.53-9.2.x86_64.rpm
          b0191eba7fbb1bc9f9c154b48f19f41e
   ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/x86_64/apache2-prefork-2.0.53-9.2.x86_64.rpm
          feec5b490afdbd30249923ccf791e5e1
   ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/x86_64/apache2-worker-2.0.53-9.2.x86_64.rpm
          418f4b6310bb98177b477a8c2af0fd3e
   source rpm(s):
   ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/src/apache2-2.0.53-9.2.src.rpm
          51cd4351f98f32df47c5d15beeeb055c

   SUSE Linux 9.2:
   ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/x86_64/apache2-2.0.50-7.4.x86_64.rpm
          2a5421e418e43d552a4782d3bc9a2486
   ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/x86_64/apache2-prefork-2.0.50-7.4.x86_64.rpm
          1617072b6ebfe834251e8e6084acf71b
   ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/x86_64/apache2-worker-2.0.50-7.4.x86_64.rpm
          a0ee7a530aefc0c902b45ffc5f140758
   source rpm(s):
   ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/src/apache2-2.0.50-7.4.src.rpm
          038265691d3d304c63301d1900d9c8f5

______________________________________________________________________________

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

See SUSE Security Summary Report.
______________________________________________________________________________

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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