Red Hat: 2014:0100-01: kernel-rt: Important Advisory

    Date28 Jan 2014
    CategoryRed Hat
    1407
    Posted ByJoe Shakespeare
    Updated kernel-rt packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise MRG 2.4. The Red Hat Security Response Team has rated this update as having [More...]
    =====================================================================
                       Red Hat Security Advisory
    
    Synopsis:          Important: kernel-rt security and bug fix update
    Advisory ID:       RHSA-2014:0100-01
    Product:           Red Hat Enterprise MRG for RHEL-6
    Advisory URL:      https://rhn.redhat.com/errata/RHSA-2014-0100.html
    Issue date:        2014-01-28
    CVE Names:         CVE-2013-2929 CVE-2013-2930 CVE-2013-4270 
                       CVE-2013-4470 CVE-2013-6378 CVE-2013-6383 
                       CVE-2013-6431 
    =====================================================================
    
    1. Summary:
    
    Updated kernel-rt packages that fix multiple security issues and several
    bugs are now available for Red Hat Enterprise MRG 2.4.
    
    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:
    
    MRG Realtime for RHEL 6 Server v.2 - noarch, x86_64
    
    3. Description:
    
    The kernel-rt packages contain the Linux kernel, the core of any Linux
    operating system.
    
    * A flaw was found in the way the Linux kernel's TCP/IP protocol suite
    implementation handled sending of certain UDP packets over sockets that
    used the UDP_CORK option when the UDP Fragmentation Offload (UFO) feature
    was enabled on the output device. A local, unprivileged user could use this
    flaw to cause a denial of service or, potentially, escalate their
    privileges on the system. (CVE-2013-4470, Important)
    
    * A flaw was found in the way the perf_trace_event_perm() function in the
    Linux kernel checked permissions for the function tracer functionality.
    An unprivileged local user could use this flaw to enable function tracing
    and cause a denial of service on the system. (CVE-2013-2930, Moderate)
    
    * A flaw was found in the way the net_ctl_permissions() function in the
    Linux kernel checked access permissions. A local, unprivileged user could
    potentially use this flaw to access certain files in /proc/sys/net
    regardless of the underlying file system permissions. (CVE-2013-4270,
    Moderate)
    
    * A flaw was found in the way the Linux kernel's Adaptec RAID controller
    (aacraid) checked permissions of compat IOCTLs. A local attacker could use
    this flaw to bypass intended security restrictions. (CVE-2013-6383,
    Moderate)
    
    * A flaw was found in the way the get_dumpable() function return value was
    interpreted in the ptrace subsystem of the Linux kernel. When
    'fs.suid_dumpable' was set to 2, a local, unprivileged local user could
    use this flaw to bypass intended ptrace restrictions and obtain
    potentially sensitive information. (CVE-2013-2929, Low)
    
    * An invalid pointer dereference flaw was found in the Marvell 8xxx
    Libertas WLAN (libertas) driver in the Linux kernel. A local user able to
    write to a file that is provided by the libertas driver and located on the
    debug file system (debugfs) could use this flaw to crash the system. Note:
    The debugfs file system must be mounted locally to exploit this issue.
    It is not mounted by default. (CVE-2013-6378, Low)
    
    * A NULL pointer dereference flaw was found in the Linux kernel's IPv6
    source address-based routing implementation. A local attacker who has the
    CAP_NET_ADMIN capability could use this flaw to crash the system.
    (CVE-2013-6431, Low)
    
    Red Hat would like to thank Hannes Frederic Sowa for reporting
    CVE-2013-4470. The CVE-2013-4270 issue was discovered by Miroslav Vadkerti
    of Red Hat.
    
    This update also fixes multiple bugs. Documentation for these changes will
    be available shortly from the Technical Notes document linked to in the
    References section.
    
    Users should upgrade to these updated packages, which upgrade the kernel-rt
    kernel to version kernel-rt-3.8.13-rt27, correct these issues, and fix the
    bugs noted in the Red Hat Enterprise MRG 2 Technical Notes. 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/site/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/):
    
    1016729 - Apply IB performance patches to 3.8 realtime kernel
    1023477 - CVE-2013-4470 Kernel: net: memory corruption with UDP_CORK and UFO
    1027752 - CVE-2013-4270 kernel: net: permissions flaw in /proc/sys/net
    1027778 - CVE-2013-2930 kernel: perf/ftrace: insufficient check in perf_trace_event_perm()
    1028148 - CVE-2013-2929 kernel: exec/ptrace: get_dumpable() incorrect tests
    1033530 - CVE-2013-6383 Kernel: AACRAID Driver compat IOCTL missing capability check
    1033578 - CVE-2013-6378 Kernel: drivers: libertas: potential oops in debugfs
    1037770 - Recent -rt kernels compiled without CONFIG_NETFILTER_XT_MATCH_ADDRTYPE
    1039054 - CVE-2013-6431 kernel: net: fib: fib6_add: potential NULL pointer dereference
    1039743 - kernel: panic when unloading ip6_tunnel module
    
    6. Package List:
    
    MRG Realtime for RHEL 6 Server v.2:
    
    Source:
    ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/RHEMRG-RHEL6/SRPMS/kernel-rt-3.8.13-rt27.33.el6rt.src.rpm
    
    noarch:
    kernel-rt-doc-3.8.13-rt27.33.el6rt.noarch.rpm
    kernel-rt-firmware-3.8.13-rt27.33.el6rt.noarch.rpm
    
    x86_64:
    kernel-rt-3.8.13-rt27.33.el6rt.x86_64.rpm
    kernel-rt-debug-3.8.13-rt27.33.el6rt.x86_64.rpm
    kernel-rt-debug-debuginfo-3.8.13-rt27.33.el6rt.x86_64.rpm
    kernel-rt-debug-devel-3.8.13-rt27.33.el6rt.x86_64.rpm
    kernel-rt-debuginfo-3.8.13-rt27.33.el6rt.x86_64.rpm
    kernel-rt-debuginfo-common-x86_64-3.8.13-rt27.33.el6rt.x86_64.rpm
    kernel-rt-devel-3.8.13-rt27.33.el6rt.x86_64.rpm
    kernel-rt-trace-3.8.13-rt27.33.el6rt.x86_64.rpm
    kernel-rt-trace-debuginfo-3.8.13-rt27.33.el6rt.x86_64.rpm
    kernel-rt-trace-devel-3.8.13-rt27.33.el6rt.x86_64.rpm
    kernel-rt-vanilla-3.8.13-rt27.33.el6rt.x86_64.rpm
    kernel-rt-vanilla-debuginfo-3.8.13-rt27.33.el6rt.x86_64.rpm
    kernel-rt-vanilla-devel-3.8.13-rt27.33.el6rt.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-2013-2929.html
    https://www.redhat.com/security/data/cve/CVE-2013-2930.html
    https://www.redhat.com/security/data/cve/CVE-2013-4270.html
    https://www.redhat.com/security/data/cve/CVE-2013-4470.html
    https://www.redhat.com/security/data/cve/CVE-2013-6378.html
    https://www.redhat.com/security/data/cve/CVE-2013-6383.html
    https://www.redhat.com/security/data/cve/CVE-2013-6431.html
    https://access.redhat.com/security/updates/classification/#important
    https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_MRG/2/html/Technical_Notes/RHSA-2014-0100.html
    
    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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