CentOS 7.x Security Kernel update - kernel.x86_64 3.10.0-514.26.1.el7

Sunka · Jun 30, 2017

Code (Text):

# yum history info 207
Loaded plugins: fastestmirror, priorities
Transaction ID : 207
Begin time     : Fri Jun 30 04:21:27 2017
Begin rpmdb    : 806:f2132b047d9a7931ecae95ffd33d49f69c6e05f0
End time       :            04:22:04 2017 (37 seconds)
End rpmdb      : 806:a5e1bcdc830ba184aeeca1e94db2dc8951743c72
User           : root <root>
Return-Code    : Success
Command Line   : update
Transaction performed with:
    Installed     rpm-4.11.3-21.el7.x86_64                      @base
    Installed     yum-3.4.3-150.el7.centos.noarch               @base
    Installed     yum-metadata-parser-1.1.4-10.el7.x86_64       @anaconda
    Installed     yum-plugin-fastestmirror-1.1.31-40.el7.noarch @base
Packages Altered:
    Updated chkconfig-1.7.2-1.el7.x86_64                   @base
    Update            1.7.2-1.el7_3.1.x86_64               @updates
    Updated cyrus-imapd-2.4.17-8.el7_1.x86_64              @base
    Update              2.4.17-8.el7_3.1.x86_64            @updates
    Updated cyrus-imapd-utils-2.4.17-8.el7_1.x86_64        @base
    Update                    2.4.17-8.el7_3.1.x86_64      @updates
    Updated device-mapper-7:1.02.135-1.el7_3.4.x86_64      @updates
    Update                7:1.02.135-1.el7_3.5.x86_64      @updates
    Updated device-mapper-libs-7:1.02.135-1.el7_3.4.x86_64 @updates
    Update                     7:1.02.135-1.el7_3.5.x86_64 @updates
    Updated dracut-033-463.el7_3.1.x86_64                  @updates
    Update         033-463.el7_3.2.x86_64                  @updates
    Updated dracut-config-rescue-033-463.el7_3.1.x86_64    @updates
    Update                       033-463.el7_3.2.x86_64    @updates
    Updated dracut-network-033-463.el7_3.1.x86_64          @updates
    Update                 033-463.el7_3.2.x86_64          @updates
    Updated gawk-4.0.2-4.el7.x86_64                        @anaconda
    Update       4.0.2-4.el7_3.1.x86_64                    @updates
    Updated ghostscript-9.07-20.el7_3.5.x86_64             @updates
    Update              9.07-20.el7_3.7.x86_64             @updates
    Updated ghostscript-devel-9.07-20.el7_3.5.x86_64       @updates
    Update                    9.07-20.el7_3.7.x86_64       @updates
    Erase   kernel-3.10.0-514.6.2.el7.x86_64               @updates
    Install kernel-3.10.0-514.26.1.el7.x86_64              @updates
    Erase   kernel-devel-3.10.0-514.6.2.el7.x86_64         @updates
    Install kernel-devel-3.10.0-514.26.1.el7.x86_64        @updates
    Updated kernel-headers-3.10.0-514.21.2.el7.x86_64      @updates
    Update                 3.10.0-514.26.1.el7.x86_64      @updates
    Updated kernel-tools-3.10.0-514.21.2.el7.x86_64        @updates
    Update               3.10.0-514.26.1.el7.x86_64        @updates
    Updated kernel-tools-libs-3.10.0-514.21.2.el7.x86_64   @updates
    Update                    3.10.0-514.26.1.el7.x86_64   @updates
    Updated python-perf-3.10.0-514.21.2.el7.x86_64         @updates
    Update              3.10.0-514.26.1.el7.x86_64         @updates
    Updated xfsprogs-4.5.0-9.el7_3.x86_64                  @updates
    Update           4.5.0-10.el7_3.x86_64                 @updates
history info

Code (Text):

# uname -r
3.10.0-514.26.1.el7.x86_64

eva2000 · Jun 30, 2017

Thanks for heads up.

CentOS 7 has a new kernel update = 3.10.0-514.26.1

Redhat 7 / CentOS 7 Red Hat Customer Portal

CVE-2017-2583 CentOS 7 only

CVE-2017-6214 also affects CentOS 6 (fixed back in May 30, 2017 with 2.6.32-696.3.1)

CVE-2017-7477 CentOS 7 only

CVE-2017-7645 also affects CentOS 6

CVE-2017-7895 also affects CentOS 6

An update for kernel is now available for Red Hat Enterprise Linux 7.

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.

The kernel packages contain the Linux kernel, the core of any Linux operating
system.

Security Fix(es):

* A flaw was found in the way Linux kernel allocates heap memory to build the
scattergather list from a fragment list(skb_shinfo(skb)->frag_list) in
the socket buffer(skb_buff). The heap overflow occurred if 'MAX_SKB_FRAGS + 1'
parameter and 'NETIF_F_FRAGLIST' feature were used together. A
remote user or process could use this flaw to potentially escalate their
privilege on a system. (CVE-2017-7477, Important)

* The NFS2/3 RPC client could send long arguments to the NFS server. These
encoded arguments are stored in an array of memory pages, and accessed using
pointer variables. Arbitrarily long arguments could make these pointers point
outside the array and cause an out-of-bounds memory access. A remote user or
program could use this flaw to crash the kernel (denial of service).
(CVE-2017-7645, Important)

* The NFSv2 and NFSv3 server implementations in the Linux kernel through 4.10.13
lacked certain checks for the end of a buffer. A remote attacker could trigger a
pointer-arithmetic error or possibly cause other unspecified impacts using
crafted requests related to fs/nfsd/nfs3xdr.c and fs/nfsd/nfsxdr.c.
(CVE-2017-7895, Important)

* The Linux kernel built with the Kernel-based Virtual Machine (CONFIG_KVM)
support was vulnerable to an incorrect segment selector(SS) value error. The
error could occur while loading values into the SS register in long mode. A user
or process inside a guest could use this flaw to crash the guest, resulting in
DoS or potentially escalate their privileges inside the guest. (CVE-2017-2583,
Moderate)

* A flaw was found in the Linux kernel's handling of packets with the URG flag.
Applications using the splice() and tcp_splice_read() functionality could allow
a remote attacker to force the kernel to enter a condition in which it could
loop indefinitely. (CVE-2017-6214, Moderate)

Red Hat would like to thank Ari Kauppi for reporting CVE-2017-7895 and Xiaohan
Zhang (Huawei Inc.) for reporting CVE-2017-2583.

Bug Fix(es):

* Previously, the reserved-pages counter (HugePages_Rsvd) was bigger than the
total-pages counter (HugePages_Total) in the /proc/meminfo file, and
HugePages_Rsvd underflowed. With this update, the HugeTLB feature of the Linux
kernel has been fixed, and HugePages_Rsvd underflow no longer occurs.
(BZ#1445184)

* If a directory on a NFS client was modified while being listed, the NFS client
could restart the directory listing multiple times. Consequently, the
performance of listing the directory was sub-optimal. With this update, the
restarting of the directory listing happens less frequently. As a result, the
performance of listing the directory while it is being modified has improved.
(BZ#1450851)

* The Fibre Channel over Ethernet (FCoE) adapter in some cases failed to reboot.
This update fixes the qla2xxx driver, and FCoE adapter now reboots as expected.
(BZ#1446246)

* When a VM with Virtual Function I/O (VFIO) device was rebooted, the QEMU
process occasionally terminated unexpectedly due to a failed VFIO Direct Memory
Access (DMA) map request. This update fixes the vfio driver and QEMU no longer
crashes in the described situation. (BZ#1450855)

* When the operating system was booted with the in-box lpfc driver, a kernel
panic occurred on the little-endian variant of IBM Power Systems. This update
fixes lpfc, and the kernel no longer panics in the described situation.
(BZ#1452044)

* When creating or destroying a VM with Virtual Function I/O (VFIO) devices with
"Hugepages" feature enabled, errors in Direct Memory Access (DMA) page table
entry (PTE) mappings occurred, and QEMU memory usage behaved unpredictably. This
update fixes range computation when making room for large pages in Input/Output
Memory Management Unit (IOMMU). As a result, errors in DMA PTE mappings no
longer occur, and QEMU has a predictable memory usage in the described
situation. (BZ#1450856)
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