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SCIENTIFIC-LINUX-ERRATA  November 2017

SCIENTIFIC-LINUX-ERRATA November 2017

Subject:

Security ERRATA Important: kernel on SL6.x i386/x86_64

From:

Pat Riehecky <[log in to unmask]>

Reply-To:

[log in to unmask]

Date:

Wed, 15 Nov 2017 14:31:58 -0000

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (100 lines)

Synopsis:          Important: kernel security and bug fix update
Advisory ID:       SLSA-2017:3200-1
Issue Date:        2017-11-15
CVE Numbers:       CVE-2017-1000111
                   CVE-2017-1000112
                   CVE-2017-14106
--

Security Fix(es):

* A race condition issue leading to a use-after-free flaw was found in the
way the raw packet sockets are implemented in the Linux kernel networking
subsystem handling synchronization. A local user able to open a raw packet
socket (requires the CAP_NET_RAW capability) could use this flaw to
elevate their privileges on the system. (CVE-2017-1000111, Important)

* An exploitable memory corruption flaw was found in the Linux kernel. The
append path can be erroneously switched from UFO to non-UFO in
ip_ufo_append_data() when building an UFO packet with MSG_MORE option. If
unprivileged user namespaces are available, this flaw can be exploited to
gain root privileges. (CVE-2017-1000112, Important)

* A divide-by-zero vulnerability was found in the __tcp_select_window
function in the Linux kernel. This can result in a kernel panic causing a
local denial of service. (CVE-2017-14106, Moderate)

Bug Fix(es):

* When the operating system was booted with RHEV/oVirt, and the eh_deadline
sysfs parameter was set to 10s, the Storage Area Network (SAN) issues
caused eh_deadline to trigger with no handler. Consequently, a kernel
panic occurred. This update fixes the lpfc driver, thus preventing the
kernel panic under described circumstances.

* When an NFS server returned the NFS4ERR_BAD_SEQID error to an OPEN
request, the open-owner was removed from the state_owners rbtree.
Consequently, NFS4 client infinite loop that required a reboot to recover
occurred. This update changes NFS4ERR_BAD_SEQID handling to leave the
open-owner in the state_owners rbtree by updating the create_time
parameter so that it looks like a new open-owner. As a result, an NFS4
client is now able to recover without falling into the infinite recovery
loop after receiving NFS4ERR_BAD_SEQID.

* If an NFS client attempted to mount NFSv3 shares from an NFS server
exported directly to the client's IP address, and this NFS client had
already mounted other shares that originated from the same server but were
exported to the subnetwork which this client was part of, the auth.unix.ip
cache expiration was not handled correctly. Consequently, the client
received the 'stale file handle' errors when trying to mount the share.
This update fixes handling of the cache expiration, and the NFSv3 shares
now mount as expected without producing the 'stale file handle' errors.

* When running a script that raised the tx ring count to its maximum value
supported by the Solarflare Network Interface Controller (NIC) driver, the
EF10 family NICs allowed the settings exceeding the hardware's capability.
Consequently, the Solarflare hardware became unusable with Scientific Linux 6. This update fixes the sfc driver, so that the tx ring
can have maximum 2048 entries for all EF10 NICs. As a result, the
Solarflare hardware no longer becomes unusable.
--

SL6
  x86_64
    kernel-2.6.32-696.16.1.el6.x86_64.rpm
    kernel-debug-2.6.32-696.16.1.el6.x86_64.rpm
    kernel-debug-debuginfo-2.6.32-696.16.1.el6.i686.rpm
    kernel-debug-debuginfo-2.6.32-696.16.1.el6.x86_64.rpm
    kernel-debug-devel-2.6.32-696.16.1.el6.i686.rpm
    kernel-debug-devel-2.6.32-696.16.1.el6.x86_64.rpm
    kernel-debuginfo-2.6.32-696.16.1.el6.i686.rpm
    kernel-debuginfo-2.6.32-696.16.1.el6.x86_64.rpm
    kernel-debuginfo-common-i686-2.6.32-696.16.1.el6.i686.rpm
    kernel-debuginfo-common-x86_64-2.6.32-696.16.1.el6.x86_64.rpm
    kernel-devel-2.6.32-696.16.1.el6.x86_64.rpm
    kernel-headers-2.6.32-696.16.1.el6.x86_64.rpm
    perf-2.6.32-696.16.1.el6.x86_64.rpm
    perf-debuginfo-2.6.32-696.16.1.el6.i686.rpm
    perf-debuginfo-2.6.32-696.16.1.el6.x86_64.rpm
    python-perf-debuginfo-2.6.32-696.16.1.el6.i686.rpm
    python-perf-debuginfo-2.6.32-696.16.1.el6.x86_64.rpm
    python-perf-2.6.32-696.16.1.el6.x86_64.rpm
  i386
    kernel-2.6.32-696.16.1.el6.i686.rpm
    kernel-debug-2.6.32-696.16.1.el6.i686.rpm
    kernel-debug-debuginfo-2.6.32-696.16.1.el6.i686.rpm
    kernel-debug-devel-2.6.32-696.16.1.el6.i686.rpm
    kernel-debuginfo-2.6.32-696.16.1.el6.i686.rpm
    kernel-debuginfo-common-i686-2.6.32-696.16.1.el6.i686.rpm
    kernel-devel-2.6.32-696.16.1.el6.i686.rpm
    kernel-headers-2.6.32-696.16.1.el6.i686.rpm
    perf-2.6.32-696.16.1.el6.i686.rpm
    perf-debuginfo-2.6.32-696.16.1.el6.i686.rpm
    python-perf-debuginfo-2.6.32-696.16.1.el6.i686.rpm
    python-perf-2.6.32-696.16.1.el6.i686.rpm
  noarch
    kernel-abi-whitelists-2.6.32-696.16.1.el6.noarch.rpm
    kernel-doc-2.6.32-696.16.1.el6.noarch.rpm
    kernel-firmware-2.6.32-696.16.1.el6.noarch.rpm

- Scientific Linux Development Team

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