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______________________________________________________________________________

                        SUSE Security Announcement

        Package:                kernel
        Announcement ID:        SUSE-SA:2010:036
        Date:                   Wed, 01 Sep 2010 11:00:00 +0000
        Affected Products:      SUSE SLES 9
                                Open Enterprise Server
                                Novell Linux POS 9
        Vulnerability Type:     remote denial of service
        CVSS v2 Base Score:     7.8 (AV:N/AC:L/Au:N/C:N/I:N/A:C)
        SUSE Default Package:   yes
        Cross-References:       CVE-2007-6206, CVE-2007-6733, CVE-2008-0598
                                CVE-2008-3275, CVE-2009-1389, CVE-2009-4020
                                CVE-2009-4537, CVE-2010-0727, CVE-2010-1083
                                CVE-2010-1088, CVE-2010-1188, CVE-2010-2521

    Content of This Advisory:
        1) Security Vulnerability Resolved:
             Linux kernel security update
           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

   This update fixes various security issues and some bugs in the SUSE Linux
   Enterprise 9 kernel.
   
   Following security issues were fixed:
   CVE-2010-2521: A crafted NFS write request might have caused a buffer overwrite,
   potentially causing a kernel crash.
   
   CVE-2008-0598: The x86_64 copy_to_user implementation might have leaked kernel
   memory depending on specific user buffer setups.
   
   CVE-2009-4537: drivers/net/r8169.c in the r8169 driver in the Linux kernel
   did not properly check the size of an Ethernet frame that exceeds the MTU,
   which allows remote attackers to (1) cause a denial of service (temporary
   network outage) via a packet with a crafted size, in conjunction with
   certain packets containing A characters and certain packets containing E
   characters; or (2) cause a denial of service (system crash) via a packet
   with a crafted size, in conjunction with certain packets containing '\0'
   characters, related to the value of the status register and erroneous
   behavior associated with the RxMaxSize register. NOTE: this vulnerability
   exists because of an incorrect fix for CVE-2009-1389.
   
   CVE-2010-1188: Use-after-free vulnerability in net/ipv4/tcp_input.c in
   the Linux kernel 2.6 when IPV6_RECVPKTINFO is set on a listening socket,
   allowed remote attackers to cause a denial of service (kernel panic)
   via a SYN packet while the socket is in a listening (TCP_LISTEN) state,
   which is not properly handled causes the skb structure to be freed.
   
   CVE-2008-3275: The (1) real_lookup and (2) __lookup_hash functions
   in fs/namei.c in the vfs implementation in the Linux kernel did not
   prevent creation of a child dentry for a deleted (aka S_DEAD) directory,
   which allowed local users to cause a denial of service ("overflow" of
   the UBIFS orphan area) via a series of attempted file creations within
   deleted directories.
   
   CVE-2007-6733: The nfs_lock function in fs/nfs/file.c in the Linux kernel
   did not properly remove POSIX locks on files that are setgid without
   group-execute permission, which allows local users to cause a denial of
   service (BUG and system crash) by locking a file on an NFS filesystem and
   then changing this files permissions, a related issue to CVE-2010-0727.
   
   CVE-2007-6206: The do_coredump function in fs/exec.c in Linux kernel
   did not change the UID of a core dump file if it exists before a root
   process creates a core dump in the same location, which might have allowed
   local users to obtain sensitive information.
   
   CVE-2010-1088: fs/namei.c in the Linux kernel did not always follow NFS
   automount "symlinks," which allowed attackers to have an unknown impact,
   related to LOOKUP_FOLLOW.
   
   CVE-2009-4020: Stack-based buffer overflow in the hfs subsystem in the
   Linux kernel allowed remote attackers to have an unspecified impact
   via a crafted Hierarchical File System (HFS) filesystem, related to the
   hfs_readdir function in fs/hfs/dir.c.
   
   CVE-2010-1083: The processcompl_compat function in
   drivers/usb/core/devio.c in Linux kernel did not clear the transfer
   buffer before returning to userspace when a USB command fails, which
   might have made it easier for physically proximate attackers to obtain
   sensitive information (kernel memory).

2) Solution or Work-Around

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

3) Special Instructions and Notes

   Please reboot the machine after installing 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 

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

   Our maintenance customers are notified individually. The packages are
   offered for installation from the maintenance web:
   
   SUSE CORE 9 for AMD64 and Intel EM64T
     https://login.microfocus.com/nidp/app/login
   
   SUSE CORE 9 for IBM zSeries 64bit
     https://login.microfocus.com/nidp/app/login
   
   SUSE CORE 9 for IBM S/390 31bit
     https://login.microfocus.com/nidp/app/login
   
   SUSE CORE 9 for IBM POWER
     https://login.microfocus.com/nidp/app/login
   
   SUSE CORE 9 for Itanium Processor Family
     https://login.microfocus.com/nidp/app/login
   
   Novell Linux POS 9
     https://login.microfocus.com/nidp/app/login
   
   SUSE SLES 9
     https://login.microfocus.com/nidp/app/login
     https://login.microfocus.com/nidp/app/login
     https://login.microfocus.com/nidp/app/login
     https://login.microfocus.com/nidp/app/login
     https://login.microfocus.com/nidp/app/login
     https://login.microfocus.com/nidp/app/login
   
   SUSE CORE 9 for x86
     https://login.microfocus.com/nidp/app/login
   
   Open Enterprise Server
     https://login.microfocus.com/nidp/app/login
     https://login.microfocus.com/nidp/app/login

______________________________________________________________________________

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 

    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
                .

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