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SuSE: udev local privilege escalation Print E-mail
User Rating:      How can I rate this item?
Posted by Benjamin D. Thomas   
SuSE
______________________________________________________________________________

                        SUSE Security Announcement

        Package:                udev
        Announcement ID:        SUSE-SA:2009:020
        Date:                   Thu, 16 Apr 2009 11:00:00 +0000
        Affected Products:      openSUSE 10.3
                                openSUSE 11.0
                                openSUSE 11.1
                                SUSE Linux Enterprise Desktop 10 SP2
                                SUSE Linux Enterprise 10 SP2 DEBUGINFO
                                SUSE Linux Enterprise Server 10 SP2
                                SLES 11 DEBUGINFO
                                SLE 11
                                SLED 11
                                SLES 11
        Vulnerability Type:     local privilege escalation
        Severity (1-10):        7
        SUSE Default Package:   yes
        Cross-References:       CVE-2009-1185 CVE-2009-1186

    Content of This Advisory:
        1) Security Vulnerability Resolved:
             udev netlink message origin check 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:
            Fix for buffer overflow in udevd postponed.
        6) Authenticity Verification and Additional Information

______________________________________________________________________________

1) Problem Description and Brief Discussion

   Sebastian Krahmer of SUSE Security identified a problem in udevd with
   handling of netlink messages.

   Local attackers could inject netlink messages due to a missing origin
   check where only the kernel should have been able to and so are able
   to escalate privileges. (CVE-2009-1185)

   Fixed packages have been released to address this issue for openSUSE
   10.3-11.1, SUSE Linux Enterprise 10 SP2 and SUSE Linux Enterprise 11.

   SUSE Linux Enterprise Server 9 and Novell Linux Desktop 9 are not
   affected by this problem.

2) Solution or Work-Around

   There is no known workaround, please install the updated packages.

3) Special Instructions and Notes

   None.

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 

   to apply the update, replacing  with the filename of the
   downloaded RPM package.


   x86 Platform:

   openSUSE 11.1:
   http://download.opensuse.org/update/11.1/rpm/i586/libudev-devel-128-9.7.1.i586.rpm
   http://download.opensuse.org/update/11.1/rpm/i586/libudev0-128-9.7.1.i586.rpm
   http://download.opensuse.org/update/11.1/rpm/i586/libvolume_id-126-17.38.1.i586.rpm
   http://download.opensuse.org/update/11.1/rpm/i586/libvolume_id-devel-128-9.7.1.i586.rpm
   http://download.opensuse.org/update/11.1/rpm/i586/libvolume_id1-128-9.7.1.i586.rpm
   http://download.opensuse.org/update/11.1/rpm/i586/udev-128-9.7.1.i586.rpm

   openSUSE 11.0:
   http://download.opensuse.org/update/11.0/rpm/i586/libvolume_id-120-13.2.i586.rpm
   http://download.opensuse.org/update/11.0/rpm/i586/libvolume_id-devel-120-13.2.i586.rpm
   http://download.opensuse.org/update/11.0/rpm/i586/udev-120-13.2.i586.rpm

   openSUSE 10.3:
   http://download.opensuse.org/update/10.3/rpm/i586/libvolume_id-114-19.3.i586.rpm
   http://download.opensuse.org/update/10.3/rpm/i586/libvolume_id-devel-114-19.3.i586.rpm
   http://download.opensuse.org/update/10.3/rpm/i586/udev-114-19.3.i586.rpm

   Power PC Platform:

   openSUSE 11.1:
   http://download.opensuse.org/update/11.1/rpm/ppc/libudev-devel-128-9.7.1.ppc.rpm
   http://download.opensuse.org/update/11.1/rpm/ppc/libudev0-128-9.7.1.ppc.rpm
   http://download.opensuse.org/update/11.1/rpm/ppc/libvolume_id-126-17.38.1.ppc.rpm
   http://download.opensuse.org/update/11.1/rpm/ppc/libvolume_id-devel-128-9.7.1.ppc.rpm
   http://download.opensuse.org/update/11.1/rpm/ppc/libvolume_id1-128-9.7.1.ppc.rpm
   http://download.opensuse.org/update/11.1/rpm/ppc/udev-128-9.7.1.ppc.rpm

   openSUSE 11.0:
   http://download.opensuse.org/update/11.0/rpm/ppc/libvolume_id-120-13.2.ppc.rpm
   http://download.opensuse.org/update/11.0/rpm/ppc/libvolume_id-devel-120-13.2.ppc.rpm
   http://download.opensuse.org/update/11.0/rpm/ppc/udev-120-13.2.ppc.rpm

   openSUSE 10.3:
   http://download.opensuse.org/update/10.3/rpm/ppc/libvolume_id-114-19.3.ppc.rpm
   http://download.opensuse.org/update/10.3/rpm/ppc/libvolume_id-devel-114-19.3.ppc.rpm
   http://download.opensuse.org/update/10.3/rpm/ppc/udev-114-19.3.ppc.rpm

   x86-64 Platform:

   openSUSE 11.1:
   http://download.opensuse.org/update/11.1/rpm/x86_64/libudev-devel-128-9.7.1.x86_64.rpm
   http://download.opensuse.org/update/11.1/rpm/x86_64/libudev0-128-9.7.1.x86_64.rpm
   http://download.opensuse.org/update/11.1/rpm/x86_64/libvolume_id-126-17.38.1.x86_64.rpm
   http://download.opensuse.org/update/11.1/rpm/x86_64/libvolume_id-devel-128-9.7.1.x86_64.rpm
   http://download.opensuse.org/update/11.1/rpm/x86_64/libvolume_id1-128-9.7.1.x86_64.rpm
   http://download.opensuse.org/update/11.1/rpm/x86_64/udev-128-9.7.1.x86_64.rpm

   openSUSE 11.0:
   http://download.opensuse.org/update/11.0/rpm/x86_64/libvolume_id-120-13.2.x86_64.rpm
   http://download.opensuse.org/update/11.0/rpm/x86_64/libvolume_id-devel-120-13.2.x86_64.rpm
   http://download.opensuse.org/update/11.0/rpm/x86_64/udev-120-13.2.x86_64.rpm

   openSUSE 10.3:
   http://download.opensuse.org/update/10.3/rpm/x86_64/libvolume_id-114-19.3.x86_64.rpm
   http://download.opensuse.org/update/10.3/rpm/x86_64/libvolume_id-devel-114-19.3.x86_64.rpm
   http://download.opensuse.org/update/10.3/rpm/x86_64/udev-114-19.3.x86_64.rpm

   Sources:

   openSUSE 11.1:
   http://download.opensuse.org/update/11.1/rpm/src/libvolume_id-126-17.38.1.src.rpm
   http://download.opensuse.org/update/11.1/rpm/src/udev-128-9.7.1.src.rpm

   openSUSE 11.0:
   http://download.opensuse.org/update/11.0/rpm/src/udev-120-13.2.src.rpm

   openSUSE 10.3:
   http://download.opensuse.org/update/10.3/rpm/src/udev-114-19.3.src.rpm

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

   SUSE Linux Enterprise Server 10 SP2
   SUSE Linux Enterprise 10 SP2 DEBUGINFO
   SUSE Linux Enterprise Desktop 10 SP2
     http://download.novell.com/index.jsp?search=Search&set_restricted=true&keywords=71325a2bff27f92de8b8882e0f5bef96

   SLES 11
   SLED 11
   SLE 11
   SLES 11 DEBUGINFO
     http://download.novell.com/index.jsp?search=Search&set_restricted=true&keywords=f2a20a677f8f07b34c3543e781db446f

______________________________________________________________________________

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

   The fix for the buffer overflow in util_path_encode() (CVE-2009-1186)
   has been postponed to a later udev release due to the urgency of the
   netlink problem. It is also rated lower, since local users cannot directly
   trigger the problematic code path.

______________________________________________________________________________

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 

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

      gpg: Signature made  using RSA key ID 3D25D3D9
      gpg: Good signature from "SuSE Security Team "

    where  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.

    The internal 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, replacing  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.

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

    opensuse-security@opensuse.org
        -   General Linux and SUSE security discussion.
            All SUSE security announcements are sent to this list.
            To subscribe, send an e-mail to
                .

    opensuse-security-announce@opensuse.org
        -   SUSE's announce-only mailing list.
            Only SUSE's security announcements are sent to this list.
            To subscribe, send an e-mail to
                .

    =====================================================================
    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, 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.
 
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