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    RedHat: RHSA-2020-5656:01 Moderate: kernel security update

    Date 21 Dec 2020
    494
    Posted By LinuxSecurity Advisories
    An update for kernel is now available for Red Hat Enterprise Linux 7.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which
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    =====================================================================
                       Red Hat Security Advisory
    
    Synopsis:          Moderate: kernel security update
    Advisory ID:       RHSA-2020:5656-01
    Product:           Red Hat Enterprise Linux
    Advisory URL:      https://access.redhat.com/errata/RHSA-2020:5656
    Issue date:        2020-12-22
    CVE Names:         CVE-2017-18551 CVE-2018-20836 CVE-2019-9454 
                       CVE-2019-19046 CVE-2019-19447 CVE-2019-20636 
                       CVE-2020-12770 
    =====================================================================
    
    1. Summary:
    
    An update for kernel is now available for Red Hat Enterprise Linux 7.6
    Extended Update Support.
    
    Red Hat Product Security has rated this update as having a security impact
    of Moderate. 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 ComputeNode EUS (v. 7.6) - noarch, x86_64
    Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) - x86_64
    Red Hat Enterprise Linux Server EUS (v. 7.6) - noarch, ppc64, ppc64le, s390x, x86_64
    Red Hat Enterprise Linux Server Optional EUS (v. 7.6) - ppc64, ppc64le, x86_64
    
    3. Description:
    
    The kernel packages contain the Linux kernel, the core of any Linux
    operating system.
    
    Security Fix(es):
    
    * kernel: out of bounds write in function i2c_smbus_xfer_emulated in
    drivers/i2c/i2c-core-smbus.c (CVE-2017-18551)
    
    * kernel: race condition in smp_task_timedout() and smp_task_done() in
    drivers/scsi/libsas/sas_expander.c leads to use-after-free (CVE-2018-20836)
    
    * kernel: out of bounds write in i2c driver leads to local escalation of
    privilege (CVE-2019-9454)
    
    * kernel: Denial Of Service in the __ipmi_bmc_register() function in
    drivers/char/ipmi/ipmi_msghandler.c (CVE-2019-19046)
    
    * kernel: mounting a crafted ext4 filesystem image, performing some
    operations, and unmounting can lead to a use-after-free in ext4_put_super
    in fs/ext4/super.c (CVE-2019-19447)
    
    * kernel: out-of-bounds write via crafted keycode table (CVE-2019-20636)
    
    * kernel: sg_write function lacks an sg_remove_request call in a certain
    failure case (CVE-2020-12770)
    
    For more details about the security issue(s), including the impact, a CVSS
    score, acknowledgments, and other related information, refer to the CVE
    page(s) listed in the References section.
    
    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/):
    
    1707796 - CVE-2018-20836 kernel: race condition in smp_task_timedout() and smp_task_done() in drivers/scsi/libsas/sas_expander.c leads to use-after-free
    1757368 - CVE-2017-18551 kernel: out of bounds write in function i2c_smbus_xfer_emulated in drivers/i2c/i2c-core-smbus.c
    1774988 - CVE-2019-19046 kernel: Denial Of Service in the __ipmi_bmc_register() function in drivers/char/ipmi/ipmi_msghandler.c
    1781679 - CVE-2019-19447 kernel: mounting a crafted ext4 filesystem image, performing some operations, and unmounting can lead to a use-after-free in ext4_put_super in fs/ext4/super.c
    1818818 - CVE-2019-9454 kernel: out of bounds write in i2c driver leads to local escalation of privilege
    1824059 - CVE-2019-20636 kernel: out-of-bounds write via crafted keycode table
    1834845 - CVE-2020-12770 kernel: sg_write function lacks an sg_remove_request call in a certain failure case
    
    6. Package List:
    
    Red Hat Enterprise Linux ComputeNode EUS (v. 7.6):
    
    Source:
    kernel-3.10.0-957.65.1.el7.src.rpm
    
    noarch:
    kernel-abi-whitelists-3.10.0-957.65.1.el7.noarch.rpm
    kernel-doc-3.10.0-957.65.1.el7.noarch.rpm
    
    x86_64:
    bpftool-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-debug-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-debug-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-debug-devel-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-debuginfo-common-x86_64-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-devel-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-headers-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-tools-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-tools-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-tools-libs-3.10.0-957.65.1.el7.x86_64.rpm
    perf-3.10.0-957.65.1.el7.x86_64.rpm
    perf-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm
    python-perf-3.10.0-957.65.1.el7.x86_64.rpm
    python-perf-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm
    
    Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6):
    
    x86_64:
    kernel-debug-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-debuginfo-common-x86_64-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-tools-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-tools-libs-devel-3.10.0-957.65.1.el7.x86_64.rpm
    perf-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm
    python-perf-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm
    
    Red Hat Enterprise Linux Server EUS (v. 7.6):
    
    Source:
    kernel-3.10.0-957.65.1.el7.src.rpm
    
    noarch:
    kernel-abi-whitelists-3.10.0-957.65.1.el7.noarch.rpm
    kernel-doc-3.10.0-957.65.1.el7.noarch.rpm
    
    ppc64:
    kernel-3.10.0-957.65.1.el7.ppc64.rpm
    kernel-bootwrapper-3.10.0-957.65.1.el7.ppc64.rpm
    kernel-debug-3.10.0-957.65.1.el7.ppc64.rpm
    kernel-debug-debuginfo-3.10.0-957.65.1.el7.ppc64.rpm
    kernel-debug-devel-3.10.0-957.65.1.el7.ppc64.rpm
    kernel-debuginfo-3.10.0-957.65.1.el7.ppc64.rpm
    kernel-debuginfo-common-ppc64-3.10.0-957.65.1.el7.ppc64.rpm
    kernel-devel-3.10.0-957.65.1.el7.ppc64.rpm
    kernel-headers-3.10.0-957.65.1.el7.ppc64.rpm
    kernel-tools-3.10.0-957.65.1.el7.ppc64.rpm
    kernel-tools-debuginfo-3.10.0-957.65.1.el7.ppc64.rpm
    kernel-tools-libs-3.10.0-957.65.1.el7.ppc64.rpm
    perf-3.10.0-957.65.1.el7.ppc64.rpm
    perf-debuginfo-3.10.0-957.65.1.el7.ppc64.rpm
    python-perf-3.10.0-957.65.1.el7.ppc64.rpm
    python-perf-debuginfo-3.10.0-957.65.1.el7.ppc64.rpm
    
    ppc64le:
    kernel-3.10.0-957.65.1.el7.ppc64le.rpm
    kernel-bootwrapper-3.10.0-957.65.1.el7.ppc64le.rpm
    kernel-debug-3.10.0-957.65.1.el7.ppc64le.rpm
    kernel-debug-debuginfo-3.10.0-957.65.1.el7.ppc64le.rpm
    kernel-debuginfo-3.10.0-957.65.1.el7.ppc64le.rpm
    kernel-debuginfo-common-ppc64le-3.10.0-957.65.1.el7.ppc64le.rpm
    kernel-devel-3.10.0-957.65.1.el7.ppc64le.rpm
    kernel-headers-3.10.0-957.65.1.el7.ppc64le.rpm
    kernel-tools-3.10.0-957.65.1.el7.ppc64le.rpm
    kernel-tools-debuginfo-3.10.0-957.65.1.el7.ppc64le.rpm
    kernel-tools-libs-3.10.0-957.65.1.el7.ppc64le.rpm
    perf-3.10.0-957.65.1.el7.ppc64le.rpm
    perf-debuginfo-3.10.0-957.65.1.el7.ppc64le.rpm
    python-perf-3.10.0-957.65.1.el7.ppc64le.rpm
    python-perf-debuginfo-3.10.0-957.65.1.el7.ppc64le.rpm
    
    s390x:
    kernel-3.10.0-957.65.1.el7.s390x.rpm
    kernel-debug-3.10.0-957.65.1.el7.s390x.rpm
    kernel-debug-debuginfo-3.10.0-957.65.1.el7.s390x.rpm
    kernel-debug-devel-3.10.0-957.65.1.el7.s390x.rpm
    kernel-debuginfo-3.10.0-957.65.1.el7.s390x.rpm
    kernel-debuginfo-common-s390x-3.10.0-957.65.1.el7.s390x.rpm
    kernel-devel-3.10.0-957.65.1.el7.s390x.rpm
    kernel-headers-3.10.0-957.65.1.el7.s390x.rpm
    kernel-kdump-3.10.0-957.65.1.el7.s390x.rpm
    kernel-kdump-debuginfo-3.10.0-957.65.1.el7.s390x.rpm
    kernel-kdump-devel-3.10.0-957.65.1.el7.s390x.rpm
    perf-3.10.0-957.65.1.el7.s390x.rpm
    perf-debuginfo-3.10.0-957.65.1.el7.s390x.rpm
    python-perf-3.10.0-957.65.1.el7.s390x.rpm
    python-perf-debuginfo-3.10.0-957.65.1.el7.s390x.rpm
    
    x86_64:
    bpftool-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-debug-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-debug-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-debug-devel-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-debuginfo-common-x86_64-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-devel-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-headers-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-tools-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-tools-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-tools-libs-3.10.0-957.65.1.el7.x86_64.rpm
    perf-3.10.0-957.65.1.el7.x86_64.rpm
    perf-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm
    python-perf-3.10.0-957.65.1.el7.x86_64.rpm
    python-perf-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm
    
    Red Hat Enterprise Linux Server Optional EUS (v. 7.6):
    
    ppc64:
    kernel-debug-debuginfo-3.10.0-957.65.1.el7.ppc64.rpm
    kernel-debuginfo-3.10.0-957.65.1.el7.ppc64.rpm
    kernel-debuginfo-common-ppc64-3.10.0-957.65.1.el7.ppc64.rpm
    kernel-tools-debuginfo-3.10.0-957.65.1.el7.ppc64.rpm
    kernel-tools-libs-devel-3.10.0-957.65.1.el7.ppc64.rpm
    perf-debuginfo-3.10.0-957.65.1.el7.ppc64.rpm
    python-perf-debuginfo-3.10.0-957.65.1.el7.ppc64.rpm
    
    ppc64le:
    kernel-debug-debuginfo-3.10.0-957.65.1.el7.ppc64le.rpm
    kernel-debug-devel-3.10.0-957.65.1.el7.ppc64le.rpm
    kernel-debuginfo-3.10.0-957.65.1.el7.ppc64le.rpm
    kernel-debuginfo-common-ppc64le-3.10.0-957.65.1.el7.ppc64le.rpm
    kernel-tools-debuginfo-3.10.0-957.65.1.el7.ppc64le.rpm
    kernel-tools-libs-devel-3.10.0-957.65.1.el7.ppc64le.rpm
    perf-debuginfo-3.10.0-957.65.1.el7.ppc64le.rpm
    python-perf-debuginfo-3.10.0-957.65.1.el7.ppc64le.rpm
    
    x86_64:
    kernel-debug-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-debuginfo-common-x86_64-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-tools-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm
    kernel-tools-libs-devel-3.10.0-957.65.1.el7.x86_64.rpm
    perf-debuginfo-3.10.0-957.65.1.el7.x86_64.rpm
    python-perf-debuginfo-3.10.0-957.65.1.el7.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-2017-18551
    https://access.redhat.com/security/cve/CVE-2018-20836
    https://access.redhat.com/security/cve/CVE-2019-9454
    https://access.redhat.com/security/cve/CVE-2019-19046
    https://access.redhat.com/security/cve/CVE-2019-19447
    https://access.redhat.com/security/cve/CVE-2019-20636
    https://access.redhat.com/security/cve/CVE-2020-12770
    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 2020 Red Hat, Inc.
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