Red Hat: 2014:0772-01: kernel: Important Advisory

    Date19 Jun 2014
    CategoryRed Hat
    1296
    Posted ByJoe Shakespeare
    Updated kernel packages that fix three security issues and two bugs are now available for Red Hat Enterprise Linux 5.9 Extended Update Support. The Red Hat Security Response Team has rated this update as having [More...]
    =====================================================================
                       Red Hat Security Advisory
    
    Synopsis:          Important: kernel security and bug fix update
    Advisory ID:       RHSA-2014:0772-01
    Product:           Red Hat Enterprise Linux
    Advisory URL:      https://rhn.redhat.com/errata/RHSA-2014-0772.html
    Issue date:        2014-06-19
    CVE Names:         CVE-2012-6638 CVE-2014-1737 CVE-2014-1738 
    =====================================================================
    
    1. Summary:
    
    Updated kernel packages that fix three security issues and two bugs are now
    available for Red Hat Enterprise Linux 5.9 Extended Update Support.
    
    The Red Hat Security Response Team has rated this update as having
    Important 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 EUS (v. 5.9 server) - i386, ia64, noarch, ppc, s390x, x86_64
    
    3. Description:
    
    The kernel packages contain the Linux kernel, the core of any Linux
    operating system.
    
    * A flaw was found in the way the Linux kernel's floppy driver handled user
    space provided data in certain error code paths while processing FDRAWCMD
    IOCTL commands. A local user with write access to /dev/fdX could use this
    flaw to free (using the kfree() function) arbitrary kernel memory.
    (CVE-2014-1737, Important)
    
    * It was found that the Linux kernel's floppy driver leaked internal kernel
    memory addresses to user space during the processing of the FDRAWCMD IOCTL
    command. A local user with write access to /dev/fdX could use this flaw to
    obtain information about the kernel heap arrangement. (CVE-2014-1738, Low)
    
    Note: A local user with write access to /dev/fdX could use these two flaws
    (CVE-2014-1737 in combination with CVE-2014-1738) to escalate their
    privileges on the system.
    
    * A flaw was found in the way the Linux kernel's TCP/IP protocol suite
    implementation handled TCP packets with both the SYN and FIN flags set.
    A remote attacker could use this flaw to consume an excessive amount of
    resources on the target system, potentially resulting in a denial of
    service. (CVE-2012-6638, Moderate)
    
    Red Hat would like to thank Matthew Daley for reporting CVE-2014-1737 and
    CVE-2014-1738.
    
    This update also fixes the following bugs:
    
    * While under heavy load, some Fibre Channel storage devices, such as
    Hitachi and HP Open-V series, can send a logout (LOGO) message to the host
    system. However, due to a bug in the lpfc driver, this could result in a
    loss of active paths to the storage and the paths could not be recovered
    without manual intervention. This update corrects the lpfc driver to ensure
    automatic recovery of the lost paths to the storage in this scenario.
    (BZ#1096060)
    
    * A bug in the futex system call could result in an overflow when passing a
    very large positive timeout. As a consequence, the FUTEX_WAIT operation did
    not work as intended and the system call was timing out immediately.
    A backported patch fixes this bug by limiting very large positive timeouts
    to the maximal supported value. (BZ#1091831)
    
    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/knowledge/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/):
    
    1066055 - CVE-2012-6638 Kernel: net: tcp: potential DoS via SYN+FIN messages
    1094299 - CVE-2014-1737 CVE-2014-1738 kernel: block: floppy: privilege escalation via FDRAWCMD floppy ioctl command
    
    6. Package List:
    
    Red Hat Enterprise Linux EUS (v. 5.9 server):
    
    Source:
    kernel-2.6.18-348.27.1.el5.src.rpm
    
    i386:
    kernel-2.6.18-348.27.1.el5.i686.rpm
    kernel-PAE-2.6.18-348.27.1.el5.i686.rpm
    kernel-PAE-debuginfo-2.6.18-348.27.1.el5.i686.rpm
    kernel-PAE-devel-2.6.18-348.27.1.el5.i686.rpm
    kernel-debug-2.6.18-348.27.1.el5.i686.rpm
    kernel-debug-debuginfo-2.6.18-348.27.1.el5.i686.rpm
    kernel-debug-devel-2.6.18-348.27.1.el5.i686.rpm
    kernel-debuginfo-2.6.18-348.27.1.el5.i686.rpm
    kernel-debuginfo-common-2.6.18-348.27.1.el5.i686.rpm
    kernel-devel-2.6.18-348.27.1.el5.i686.rpm
    kernel-headers-2.6.18-348.27.1.el5.i386.rpm
    kernel-xen-2.6.18-348.27.1.el5.i686.rpm
    kernel-xen-debuginfo-2.6.18-348.27.1.el5.i686.rpm
    kernel-xen-devel-2.6.18-348.27.1.el5.i686.rpm
    
    ia64:
    kernel-2.6.18-348.27.1.el5.ia64.rpm
    kernel-debug-2.6.18-348.27.1.el5.ia64.rpm
    kernel-debug-debuginfo-2.6.18-348.27.1.el5.ia64.rpm
    kernel-debug-devel-2.6.18-348.27.1.el5.ia64.rpm
    kernel-debuginfo-2.6.18-348.27.1.el5.ia64.rpm
    kernel-debuginfo-common-2.6.18-348.27.1.el5.ia64.rpm
    kernel-devel-2.6.18-348.27.1.el5.ia64.rpm
    kernel-headers-2.6.18-348.27.1.el5.ia64.rpm
    kernel-xen-2.6.18-348.27.1.el5.ia64.rpm
    kernel-xen-debuginfo-2.6.18-348.27.1.el5.ia64.rpm
    kernel-xen-devel-2.6.18-348.27.1.el5.ia64.rpm
    
    noarch:
    kernel-doc-2.6.18-348.27.1.el5.noarch.rpm
    
    ppc:
    kernel-2.6.18-348.27.1.el5.ppc64.rpm
    kernel-debug-2.6.18-348.27.1.el5.ppc64.rpm
    kernel-debug-debuginfo-2.6.18-348.27.1.el5.ppc64.rpm
    kernel-debug-devel-2.6.18-348.27.1.el5.ppc64.rpm
    kernel-debuginfo-2.6.18-348.27.1.el5.ppc64.rpm
    kernel-debuginfo-common-2.6.18-348.27.1.el5.ppc64.rpm
    kernel-devel-2.6.18-348.27.1.el5.ppc64.rpm
    kernel-headers-2.6.18-348.27.1.el5.ppc.rpm
    kernel-headers-2.6.18-348.27.1.el5.ppc64.rpm
    kernel-kdump-2.6.18-348.27.1.el5.ppc64.rpm
    kernel-kdump-debuginfo-2.6.18-348.27.1.el5.ppc64.rpm
    kernel-kdump-devel-2.6.18-348.27.1.el5.ppc64.rpm
    
    s390x:
    kernel-2.6.18-348.27.1.el5.s390x.rpm
    kernel-debug-2.6.18-348.27.1.el5.s390x.rpm
    kernel-debug-debuginfo-2.6.18-348.27.1.el5.s390x.rpm
    kernel-debug-devel-2.6.18-348.27.1.el5.s390x.rpm
    kernel-debuginfo-2.6.18-348.27.1.el5.s390x.rpm
    kernel-debuginfo-common-2.6.18-348.27.1.el5.s390x.rpm
    kernel-devel-2.6.18-348.27.1.el5.s390x.rpm
    kernel-headers-2.6.18-348.27.1.el5.s390x.rpm
    kernel-kdump-2.6.18-348.27.1.el5.s390x.rpm
    kernel-kdump-debuginfo-2.6.18-348.27.1.el5.s390x.rpm
    kernel-kdump-devel-2.6.18-348.27.1.el5.s390x.rpm
    
    x86_64:
    kernel-2.6.18-348.27.1.el5.x86_64.rpm
    kernel-debug-2.6.18-348.27.1.el5.x86_64.rpm
    kernel-debug-debuginfo-2.6.18-348.27.1.el5.x86_64.rpm
    kernel-debug-devel-2.6.18-348.27.1.el5.x86_64.rpm
    kernel-debuginfo-2.6.18-348.27.1.el5.x86_64.rpm
    kernel-debuginfo-common-2.6.18-348.27.1.el5.x86_64.rpm
    kernel-devel-2.6.18-348.27.1.el5.x86_64.rpm
    kernel-headers-2.6.18-348.27.1.el5.x86_64.rpm
    kernel-xen-2.6.18-348.27.1.el5.x86_64.rpm
    kernel-xen-debuginfo-2.6.18-348.27.1.el5.x86_64.rpm
    kernel-xen-devel-2.6.18-348.27.1.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-2012-6638.html
    https://www.redhat.com/security/data/cve/CVE-2014-1737.html
    https://www.redhat.com/security/data/cve/CVE-2014-1738.html
    https://access.redhat.com/security/updates/classification/#important
    
    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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