Red Hat: 2014:0926-01: kernel: Moderate Advisory

    Date23 Jul 2014
    CategoryRed Hat
    821
    Posted ByJoe Shakespeare
    Updated kernel packages that fix two security issues and several bugs are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having [More...]
    =====================================================================
                       Red Hat Security Advisory
    
    Synopsis:          Moderate: kernel security and bug fix update
    Advisory ID:       RHSA-2014:0926-01
    Product:           Red Hat Enterprise Linux
    Advisory URL:      https://rhn.redhat.com/errata/RHSA-2014-0926.html
    Issue date:        2014-07-23
    CVE Names:         CVE-2014-2678 CVE-2014-4021 
    =====================================================================
    
    1. Summary:
    
    Updated kernel packages that fix two security issues and several bugs are
    now available for Red Hat Enterprise Linux 5.
    
    The Red Hat Security Response Team has rated this update as having
    Moderate security impact. Common Vulnerability Scoring System (CVSS) base
    scores, which give detailed severity ratings, are available for each
    vulnerability from the CVE links in the References section.
    
    2. Relevant releases/architectures:
    
    Red Hat Enterprise Linux (v. 5 server) - i386, ia64, noarch, ppc, s390x, x86_64
    Red Hat Enterprise Linux Desktop (v. 5 client) - i386, noarch, x86_64
    
    3. Description:
    
    The kernel packages contain the Linux kernel, the core of any Linux
    operating system.
    
    * A NULL pointer dereference flaw was found in the rds_iw_laddr_check()
    function in the Linux kernel's implementation of Reliable Datagram Sockets
    (RDS). A local, unprivileged user could use this flaw to crash the system.
    (CVE-2014-2678, Moderate)
    
    * It was found that the Xen hypervisor implementation did not properly
    clean memory pages previously allocated by the hypervisor. A privileged
    guest user could potentially use this flaw to read data relating to other
    guests or the hypervisor itself. (CVE-2014-4021, Moderate)
    
    Red Hat would like to thank the Xen project for reporting CVE-2014-4021.
    Upstream acknowledges Jan Beulich as the original reporter.
    
    This update also fixes the following bugs:
    
    * A bug in the journaling block device (jbd and jbd2) code could, under
    certain circumstances, trigger a BUG_ON() assertion and result in a kernel
    oops. This happened when an application performed an extensive number of
    commits to the journal of the ext3 file system and there was no currently
    active transaction while synchronizing the file's in-core state. This
    problem has been resolved by correcting respective test conditions in the
    jbd and jbd2 code. (BZ#1097528)
    
    * After a statically defined gateway became unreachable and its
    corresponding neighbor entry entered a FAILED state, the gateway stayed in
    the FAILED state even after it became reachable again. As a consequence,
    traffic was not routed through that gateway. This update allows probing
    such a gateway automatically so that the traffic can be routed through
    this gateway again once it becomes reachable. (BZ#1106354)
    
    * Due to an incorrect condition check in the IPv6 code, the ipv6 driver
    was unable to correctly assemble incoming packet fragments, which resulted
    in a high IPv6 packet loss rate. This update fixes the said check for a
    fragment overlap and ensures that incoming IPv6 packet fragments are now
    processed as expected. (BZ#1107932)
    
    * Recent changes in the d_splice_alias() function introduced a bug that
    allowed d_splice_alias() to return a dentry from a different directory
    than the directory being looked up. As a consequence in cluster
    environment, a kernel panic could be triggered when a directory was being
    removed while a concurrent cross-directory operation was performed on this
    directory on another cluster node. This update avoids the kernel panic in
    this situation by correcting the search logic in the d_splice_alias()
    function so that the function can no longer return a dentry from an
    incorrect directory. (BZ#1109720)
    
    * The NFSv4 server did not handle multiple OPEN operations to the same file
    separately, which could cause the NFSv4 client to repeatedly send CLOSE
    requests with the same state ID, even though the NFS server rejected the
    request with an NFS4ERR_OLD_STATEID (10024) error code. This update
    ensures that the NFSv4 client no longer re-sends the same CLOSE request
    after receiving NFS4ERR_OLD_STATEID. (BZ#1113468)
    
    All kernel users are advised to upgrade to these updated packages, which
    contain backported patches to correct these issues. The system must be
    rebooted for this update to take effect.
    
    4. Solution:
    
    Before applying this update, make sure all previously released errata
    relevant to your system have been applied.
    
    This update is available via the Red Hat Network. Details on how to use the
    Red Hat Network to apply this update are available at
    https://access.redhat.com/articles/11258
    
    To install kernel packages manually, use "rpm -ivh [package]". Do not use
    "rpm -Uvh" as that will remove the running kernel binaries from your
    system. You may use "rpm -e" to remove old kernels after determining that
    the new kernel functions properly on your system.
    
    5. Bugs fixed (https://bugzilla.redhat.com/):
    
    1083274 - CVE-2014-2678 kernel: net: rds: dereference of a NULL device in rds_iw_laddr_check()
    1103646 - CVE-2014-4021 xen: Hypervisor heap contents leaked to guests (xsa-100)
    
    6. Package List:
    
    Red Hat Enterprise Linux Desktop (v. 5 client):
    
    Source:
    kernel-2.6.18-371.11.1.el5.src.rpm
    
    i386:
    kernel-2.6.18-371.11.1.el5.i686.rpm
    kernel-PAE-2.6.18-371.11.1.el5.i686.rpm
    kernel-PAE-debuginfo-2.6.18-371.11.1.el5.i686.rpm
    kernel-PAE-devel-2.6.18-371.11.1.el5.i686.rpm
    kernel-debug-2.6.18-371.11.1.el5.i686.rpm
    kernel-debug-debuginfo-2.6.18-371.11.1.el5.i686.rpm
    kernel-debug-devel-2.6.18-371.11.1.el5.i686.rpm
    kernel-debuginfo-2.6.18-371.11.1.el5.i686.rpm
    kernel-debuginfo-common-2.6.18-371.11.1.el5.i686.rpm
    kernel-devel-2.6.18-371.11.1.el5.i686.rpm
    kernel-headers-2.6.18-371.11.1.el5.i386.rpm
    kernel-xen-2.6.18-371.11.1.el5.i686.rpm
    kernel-xen-debuginfo-2.6.18-371.11.1.el5.i686.rpm
    kernel-xen-devel-2.6.18-371.11.1.el5.i686.rpm
    
    noarch:
    kernel-doc-2.6.18-371.11.1.el5.noarch.rpm
    
    x86_64:
    kernel-2.6.18-371.11.1.el5.x86_64.rpm
    kernel-debug-2.6.18-371.11.1.el5.x86_64.rpm
    kernel-debug-debuginfo-2.6.18-371.11.1.el5.x86_64.rpm
    kernel-debug-devel-2.6.18-371.11.1.el5.x86_64.rpm
    kernel-debuginfo-2.6.18-371.11.1.el5.x86_64.rpm
    kernel-debuginfo-common-2.6.18-371.11.1.el5.x86_64.rpm
    kernel-devel-2.6.18-371.11.1.el5.x86_64.rpm
    kernel-headers-2.6.18-371.11.1.el5.x86_64.rpm
    kernel-xen-2.6.18-371.11.1.el5.x86_64.rpm
    kernel-xen-debuginfo-2.6.18-371.11.1.el5.x86_64.rpm
    kernel-xen-devel-2.6.18-371.11.1.el5.x86_64.rpm
    
    Red Hat Enterprise Linux (v. 5 server):
    
    Source:
    kernel-2.6.18-371.11.1.el5.src.rpm
    
    i386:
    kernel-2.6.18-371.11.1.el5.i686.rpm
    kernel-PAE-2.6.18-371.11.1.el5.i686.rpm
    kernel-PAE-debuginfo-2.6.18-371.11.1.el5.i686.rpm
    kernel-PAE-devel-2.6.18-371.11.1.el5.i686.rpm
    kernel-debug-2.6.18-371.11.1.el5.i686.rpm
    kernel-debug-debuginfo-2.6.18-371.11.1.el5.i686.rpm
    kernel-debug-devel-2.6.18-371.11.1.el5.i686.rpm
    kernel-debuginfo-2.6.18-371.11.1.el5.i686.rpm
    kernel-debuginfo-common-2.6.18-371.11.1.el5.i686.rpm
    kernel-devel-2.6.18-371.11.1.el5.i686.rpm
    kernel-headers-2.6.18-371.11.1.el5.i386.rpm
    kernel-xen-2.6.18-371.11.1.el5.i686.rpm
    kernel-xen-debuginfo-2.6.18-371.11.1.el5.i686.rpm
    kernel-xen-devel-2.6.18-371.11.1.el5.i686.rpm
    
    ia64:
    kernel-2.6.18-371.11.1.el5.ia64.rpm
    kernel-debug-2.6.18-371.11.1.el5.ia64.rpm
    kernel-debug-debuginfo-2.6.18-371.11.1.el5.ia64.rpm
    kernel-debug-devel-2.6.18-371.11.1.el5.ia64.rpm
    kernel-debuginfo-2.6.18-371.11.1.el5.ia64.rpm
    kernel-debuginfo-common-2.6.18-371.11.1.el5.ia64.rpm
    kernel-devel-2.6.18-371.11.1.el5.ia64.rpm
    kernel-headers-2.6.18-371.11.1.el5.ia64.rpm
    kernel-xen-2.6.18-371.11.1.el5.ia64.rpm
    kernel-xen-debuginfo-2.6.18-371.11.1.el5.ia64.rpm
    kernel-xen-devel-2.6.18-371.11.1.el5.ia64.rpm
    
    noarch:
    kernel-doc-2.6.18-371.11.1.el5.noarch.rpm
    
    ppc:
    kernel-2.6.18-371.11.1.el5.ppc64.rpm
    kernel-debug-2.6.18-371.11.1.el5.ppc64.rpm
    kernel-debug-debuginfo-2.6.18-371.11.1.el5.ppc64.rpm
    kernel-debug-devel-2.6.18-371.11.1.el5.ppc64.rpm
    kernel-debuginfo-2.6.18-371.11.1.el5.ppc64.rpm
    kernel-debuginfo-common-2.6.18-371.11.1.el5.ppc64.rpm
    kernel-devel-2.6.18-371.11.1.el5.ppc64.rpm
    kernel-headers-2.6.18-371.11.1.el5.ppc.rpm
    kernel-headers-2.6.18-371.11.1.el5.ppc64.rpm
    kernel-kdump-2.6.18-371.11.1.el5.ppc64.rpm
    kernel-kdump-debuginfo-2.6.18-371.11.1.el5.ppc64.rpm
    kernel-kdump-devel-2.6.18-371.11.1.el5.ppc64.rpm
    
    s390x:
    kernel-2.6.18-371.11.1.el5.s390x.rpm
    kernel-debug-2.6.18-371.11.1.el5.s390x.rpm
    kernel-debug-debuginfo-2.6.18-371.11.1.el5.s390x.rpm
    kernel-debug-devel-2.6.18-371.11.1.el5.s390x.rpm
    kernel-debuginfo-2.6.18-371.11.1.el5.s390x.rpm
    kernel-debuginfo-common-2.6.18-371.11.1.el5.s390x.rpm
    kernel-devel-2.6.18-371.11.1.el5.s390x.rpm
    kernel-headers-2.6.18-371.11.1.el5.s390x.rpm
    kernel-kdump-2.6.18-371.11.1.el5.s390x.rpm
    kernel-kdump-debuginfo-2.6.18-371.11.1.el5.s390x.rpm
    kernel-kdump-devel-2.6.18-371.11.1.el5.s390x.rpm
    
    x86_64:
    kernel-2.6.18-371.11.1.el5.x86_64.rpm
    kernel-debug-2.6.18-371.11.1.el5.x86_64.rpm
    kernel-debug-debuginfo-2.6.18-371.11.1.el5.x86_64.rpm
    kernel-debug-devel-2.6.18-371.11.1.el5.x86_64.rpm
    kernel-debuginfo-2.6.18-371.11.1.el5.x86_64.rpm
    kernel-debuginfo-common-2.6.18-371.11.1.el5.x86_64.rpm
    kernel-devel-2.6.18-371.11.1.el5.x86_64.rpm
    kernel-headers-2.6.18-371.11.1.el5.x86_64.rpm
    kernel-xen-2.6.18-371.11.1.el5.x86_64.rpm
    kernel-xen-debuginfo-2.6.18-371.11.1.el5.x86_64.rpm
    kernel-xen-devel-2.6.18-371.11.1.el5.x86_64.rpm
    
    These packages are GPG signed by Red Hat for security.  Our key and
    details on how to verify the signature are available from
    https://access.redhat.com/security/team/key/#package
    
    7. References:
    
    https://www.redhat.com/security/data/cve/CVE-2014-2678.html
    https://www.redhat.com/security/data/cve/CVE-2014-4021.html
    https://access.redhat.com/security/updates/classification/#moderate
    
    8. Contact:
    
    The Red Hat security contact is .  More contact
    details at https://access.redhat.com/security/team/contact/
    
    Copyright 2014 Red Hat, Inc.
    
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