RedHat: RHSA-2019-2869:01 Important: kernel security and bug fix update

    Date23 Sep 2019
    CategoryRed Hat
    409
    Posted ByLinuxSecurity Advisories
    An update for kernel is now available for Red Hat Enterprise Linux 6.6 Advanced Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score,
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    =====================================================================
                       Red Hat Security Advisory
    
    Synopsis:          Important: kernel security and bug fix update
    Advisory ID:       RHSA-2019:2869-01
    Product:           Red Hat Enterprise Linux
    Advisory URL:      https://access.redhat.com/errata/RHSA-2019:2869
    Issue date:        2019-09-23
    CVE Names:         CVE-2019-14835 
    =====================================================================
    
    1. Summary:
    
    An update for kernel is now available for Red Hat Enterprise Linux 6.6
    Advanced Update Support.
    
    Red Hat Product Security has rated this update as having a security impact
    of Important. A Common Vulnerability Scoring System (CVSS) base score,
    which gives a detailed severity rating, is available for each vulnerability
    from the CVE link(s) in the References section.
    
    2. Relevant releases/architectures:
    
    Red Hat Enterprise Linux Server AUS (v. 6.6) - noarch, x86_64
    Red Hat Enterprise Linux Server Optional AUS (v. 6.6) - x86_64
    
    3. Description:
    
    The kernel packages contain the Linux kernel, the core of any Linux
    operating system.
    
    Security Fix(es):
    
    * A buffer overflow flaw was found in the way Linux kernel's vhost
    functionality that translates virtqueue buffers to IOVs, logged the buffer
    descriptors during migration. A privileged guest user able to pass
    descriptors with invalid length to the host when migration is underway,
    could use this flaw to increase their privileges on the host.
    (CVE-2019-14835)
    
    Bug Fix(es):
    
    * fragmented packets timing out (BZ#1741131)
    
    * Backport TCP follow-up for small buffers (BZ#1741143)
    
    4. Solution:
    
    For details on how to apply this update, which includes the changes
    described in this advisory, refer to:
    
    https://access.redhat.com/articles/11258
    
    The system must be rebooted for this update to take effect.
    
    5. Bugs fixed (https://bugzilla.redhat.com/):
    
    1750727 - CVE-2019-14835 kernel: vhost-net: guest to host kernel escape during migration
    
    6. Package List:
    
    Red Hat Enterprise Linux Server AUS (v. 6.6):
    
    Source:
    kernel-2.6.32-504.81.2.el6.src.rpm
    
    noarch:
    kernel-abi-whitelists-2.6.32-504.81.2.el6.noarch.rpm
    kernel-doc-2.6.32-504.81.2.el6.noarch.rpm
    kernel-firmware-2.6.32-504.81.2.el6.noarch.rpm
    
    x86_64:
    kernel-2.6.32-504.81.2.el6.x86_64.rpm
    kernel-debug-2.6.32-504.81.2.el6.x86_64.rpm
    kernel-debug-debuginfo-2.6.32-504.81.2.el6.x86_64.rpm
    kernel-debug-devel-2.6.32-504.81.2.el6.x86_64.rpm
    kernel-debuginfo-2.6.32-504.81.2.el6.x86_64.rpm
    kernel-debuginfo-common-x86_64-2.6.32-504.81.2.el6.x86_64.rpm
    kernel-devel-2.6.32-504.81.2.el6.x86_64.rpm
    kernel-headers-2.6.32-504.81.2.el6.x86_64.rpm
    perf-2.6.32-504.81.2.el6.x86_64.rpm
    perf-debuginfo-2.6.32-504.81.2.el6.x86_64.rpm
    python-perf-debuginfo-2.6.32-504.81.2.el6.x86_64.rpm
    
    Red Hat Enterprise Linux Server Optional AUS (v. 6.6):
    
    x86_64:
    kernel-debug-debuginfo-2.6.32-504.81.2.el6.x86_64.rpm
    kernel-debuginfo-2.6.32-504.81.2.el6.x86_64.rpm
    kernel-debuginfo-common-x86_64-2.6.32-504.81.2.el6.x86_64.rpm
    perf-debuginfo-2.6.32-504.81.2.el6.x86_64.rpm
    python-perf-2.6.32-504.81.2.el6.x86_64.rpm
    python-perf-debuginfo-2.6.32-504.81.2.el6.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/
    
    7. References:
    
    https://access.redhat.com/security/cve/CVE-2019-14835
    https://access.redhat.com/security/updates/classification/#important
    https://access.redhat.com/security/vulnerabilities/kernel-vhost
    
    8. Contact:
    
    The Red Hat security contact is . More contact
    details at https://access.redhat.com/security/team/contact/
    
    Copyright 2019 Red Hat, Inc.
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