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SuSE: Linux kernel (SUSE-SA:2009:031) Print E-mail
User Rating:      How can I rate this item?
Posted by Benjamin D. Thomas   
SuSE
______________________________________________________________________________

                        SUSE Security Announcement

        Package:                kernel
        Announcement ID:        SUSE-SA:2009:031
        Date:                   Mon, 09 Jun 2009 09:00:00 +0000
        Affected Products:      openSUSE 11.0
        Vulnerability Type:     remote code execution
        Severity (1-10):        9
        SUSE Default Package:   yes
        Cross-References:       CVE-2009-0028, CVE-2009-0065, CVE-2009-0269
                                CVE-2009-0322, CVE-2009-0675, CVE-2009-0676
                                CVE-2009-0834, CVE-2009-0835, CVE-2009-0859
                                CVE-2009-1072, CVE-2009-1242, CVE-2009-1265
                                CVE-2009-1337, CVE-2009-1439, CVE-2009-1630
                                CVE-2009-1961

    Content of This Advisory:
        1) Security Vulnerability Resolved:
             Linux kernel 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:
            See SUSE Security Summary Report.
        6) Authenticity Verification and Additional Information

______________________________________________________________________________

1) Problem Description and Brief Discussion

   This kernel update for openSUSE 11.0 fixes some bugs and several
   security problems.

   The following security issues are fixed:
   CVE-2009-0065: Buffer overflow in net/sctp/sm_statefuns.c in the
   Stream Control Transmission Protocol (sctp) implementation in the
   Linux kernel allows remote attackers to remotely execute code via an
   FWD-TSN (aka FORWARD-TSN) chunk with a large stream ID.

   CVE-2009-1961: A local denial of service problem in the splice(2)
   system call.

   CVE-2009-1630: The nfs_permission function in fs/nfs/dir.c in the
   NFS client implementation in the Linux kernel when atomic_open is
   available, does not check execute (aka EXEC or MAY_EXEC) permission
   bits, which allows local users to bypass permissions and execute files,
   as demonstrated by files on an NFSv4 file server.

   CVE-2009-0834: The audit_syscall_entry function in the Linux kernel
   on the x86_64 platform did not properly handle (1) a 32-bit process
   making a 64-bit syscall or (2) a 64-bit process making a 32-bit
   syscall, which allows local users to bypass certain syscall audit
   configurations via crafted syscalls.

   CVE-2009-1072: nfsd in the Linux kernel did not drop the CAP_MKNOD
   capability before handling a user request in a thread, which allows
   local users to create device nodes, as demonstrated on a filesystem
   that has been exported with the root_squash option.

   CVE-2009-0835  The __secure_computing function in kernel/seccomp.c
   in the seccomp subsystem in the Linux kernel on the x86_64 platform,
   when CONFIG_SECCOMP is enabled, does not properly handle (1) a 32-bit
   process making a 64-bit syscall or (2) a 64-bit process making a
   32-bit syscall, which allows local users to bypass intended access
   restrictions via crafted syscalls that are misinterpreted as (a)
   stat or (b) chmod.

   CVE-2009-1439: Buffer overflow in fs/cifs/connect.c in CIFS in the
   Linux kernel 2.6.29 and earlier allows remote attackers to cause
   a denial of service (crash) or potential code execution via a long
   nativeFileSystem field in a Tree Connect response to an SMB mount
   request.

   This requires that kernel can be made to mount a "cifs" filesystem
   from a malicious CIFS server.

   CVE-2009-1337: The exit_notify function in kernel/exit.c in the Linux
   kernel did not restrict exit signals when the CAP_KILL capability
   is held, which allows local users to send an arbitrary signal to a
   process by running a program that modifies the exit_signal field and
   then uses an exec system call to launch a setuid application.

   CVE-2009-0859: The shm_get_stat function in ipc/shm.c in the shm
   subsystem in the Linux kernel, when CONFIG_SHMEM is disabled,
   misinterprets the data type of an inode, which allows local users
   to cause a denial of service (system hang) via an SHM_INFO shmctl
   call, as demonstrated by running the ipcs program. (SUSE is enabling
   CONFIG_SHMEM, so is by default not affected, the fix is just for
   completeness).

   CVE-2009-1242: The vmx_set_msr function in arch/x86/kvm/vmx.c in
   the VMX implementation in the KVM subsystem in the Linux kernel on
   the i386 platform allows guest OS users to cause a denial of service
   (OOPS) by setting the EFER_LME (aka "Long mode enable") bit in the
   Extended Feature Enable Register (EFER) model-specific register,
   which is specific to the x86_64 platform.

   CVE-2009-1265: Integer overflow in rose_sendmsg (sys/net/af_rose.c) in
   the Linux kernel might allow attackers to obtain sensitive information
   via a large length value, which causes "garbage" memory to be sent.

   CVE-2009-0028: The clone system call in the Linux kernel allows
   local users to send arbitrary signals to a parent process from an
   unprivileged child process by launching an additional child process
   with the CLONE_PARENT flag, and then letting this new process exit.

   CVE-2009-0675: The skfp_ioctl function in drivers/net/skfp/skfddi.c
   in the Linux kernel permits SKFP_CLR_STATS requests only when the
   CAP_NET_ADMIN capability is absent, instead of when this capability
   is present, which allows local users to reset the driver statistics,
   related to an "inverted logic" issue.

   CVE-2009-0676: The sock_getsockopt function in net/core/sock.c in
   the Linux kernel does not initialize a certain structure member,
   which allows local users to obtain potentially sensitive information
   from kernel memory via an SO_BSDCOMPAT getsockopt request.

   CVE-2009-0322: drivers/firmware/dell_rbu.c in the Linux kernel allows
   local users to cause a denial of service (system crash) via a read
   system call that specifies zero bytes from the (1) image_type or (2)
   packet_size file in /sys/devices/platform/dell_rbu/.

   CVE-2009-0269: fs/ecryptfs/inode.c in the eCryptfs subsystem in the
   Linux kernel allows local users to cause a denial of service (fault
   or memory corruption), or possibly have unspecified other impact,
   via a readlink call that results in an error, leading to use of a -1
   return value as an array index.

   Some other non-security bugs were fixed, please see the RPM changelog.

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.


   x86 Platform:

   openSUSE 11.0:
   http://download.opensuse.org/update/11.0/rpm/i586/kernel-debug-2.6.25.20-0.4.i586.rpm
   http://download.opensuse.org/update/11.0/rpm/i586/kernel-default-2.6.25.20-0.4.i586.rpm
   http://download.opensuse.org/update/11.0/rpm/i586/kernel-pae-2.6.25.20-0.4.i586.rpm
   http://download.opensuse.org/update/11.0/rpm/i586/kernel-source-2.6.25.20-0.4.i586.rpm
   http://download.opensuse.org/update/11.0/rpm/i586/kernel-syms-2.6.25.20-0.4.i586.rpm
   http://download.opensuse.org/update/11.0/rpm/i586/kernel-vanilla-2.6.25.20-0.4.i586.rpm
   http://download.opensuse.org/update/11.0/rpm/i586/kernel-xen-2.6.25.20-0.4.i586.rpm

   Platform Independent:

   openSUSE 11.0:
   http://download.opensuse.org/update/11.0/rpm/noarch/kernel-docs-2.6.25.20-0.4.noarch.rpm

   Power PC Platform:

   openSUSE 11.0:
   http://download.opensuse.org/update/11.0/rpm/ppc/kernel-default-2.6.25.20-0.4.ppc.rpm
   http://download.opensuse.org/update/11.0/rpm/ppc/kernel-kdump-2.6.25.20-0.4.ppc.rpm
   http://download.opensuse.org/update/11.0/rpm/ppc/kernel-ppc64-2.6.25.20-0.4.ppc.rpm
   http://download.opensuse.org/update/11.0/rpm/ppc/kernel-ps3-2.6.25.20-0.4.ppc.rpm
   http://download.opensuse.org/update/11.0/rpm/ppc/kernel-source-2.6.25.20-0.4.ppc.rpm
   http://download.opensuse.org/update/11.0/rpm/ppc/kernel-syms-2.6.25.20-0.4.ppc.rpm
   http://download.opensuse.org/update/11.0/rpm/ppc/kernel-vanilla-2.6.25.20-0.4.ppc.rpm

   x86-64 Platform:

   openSUSE 11.0:
   http://download.opensuse.org/update/11.0/rpm/x86_64/kernel-debug-2.6.25.20-0.4.x86_64.rpm
   http://download.opensuse.org/update/11.0/rpm/x86_64/kernel-default-2.6.25.20-0.4.x86_64.rpm
   http://download.opensuse.org/update/11.0/rpm/x86_64/kernel-source-2.6.25.20-0.4.x86_64.rpm
   http://download.opensuse.org/update/11.0/rpm/x86_64/kernel-syms-2.6.25.20-0.4.x86_64.rpm
   http://download.opensuse.org/update/11.0/rpm/x86_64/kernel-vanilla-2.6.25.20-0.4.x86_64.rpm
   http://download.opensuse.org/update/11.0/rpm/x86_64/kernel-xen-2.6.25.20-0.4.x86_64.rpm

   Sources:

   openSUSE 11.0:
   http://download.opensuse.org/update/11.0/rpm/src/kernel-debug-2.6.25.20-0.4.nosrc.rpm
   http://download.opensuse.org/update/11.0/rpm/src/kernel-default-2.6.25.20-0.4.nosrc.rpm
   http://download.opensuse.org/update/11.0/rpm/src/kernel-docs-2.6.25.20-0.4.src.rpm
   http://download.opensuse.org/update/11.0/rpm/src/kernel-kdump-2.6.25.20-0.4.nosrc.rpm
   http://download.opensuse.org/update/11.0/rpm/src/kernel-pae-2.6.25.20-0.4.nosrc.rpm
   http://download.opensuse.org/update/11.0/rpm/src/kernel-ppc64-2.6.25.20-0.4.nosrc.rpm
   http://download.opensuse.org/update/11.0/rpm/src/kernel-ps3-2.6.25.20-0.4.nosrc.rpm
   http://download.opensuse.org/update/11.0/rpm/src/kernel-source-2.6.25.20-0.4.src.rpm
   http://download.opensuse.org/update/11.0/rpm/src/kernel-syms-2.6.25.20-0.4.src.rpm
   http://download.opensuse.org/update/11.0/rpm/src/kernel-vanilla-2.6.25.20-0.4.nosrc.rpm
   http://download.opensuse.org/update/11.0/rpm/src/kernel-xen-2.6.25.20-0.4.nosrc.rpm

______________________________________________________________________________

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
                .

    =====================================================================
    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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