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=====================================================================
Red Hat Security Advisory

Synopsis: Important: kernel security and bug fix update
Advisory ID: RHSA-2018:1854-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:1854
Issue date: 2018-06-19
CVE Names: CVE-2012-6701 CVE-2015-8830 CVE-2016-8650
CVE-2017-2671 CVE-2017-6001 CVE-2017-7308
CVE-2017-7616 CVE-2017-7889 CVE-2017-8890
CVE-2017-9075 CVE-2017-9076 CVE-2017-9077
CVE-2017-12190 CVE-2017-15121 CVE-2017-18203
CVE-2018-1130 CVE-2018-3639 CVE-2018-5803
=====================================================================

1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 6.

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 Desktop (v. 6) – i386, noarch, x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) – i386, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) – noarch, x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) – x86_64
Red Hat Enterprise Linux Server (v. 6) – i386, noarch, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) – i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) – i386, noarch, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) – i386, x86_64

3. Description:

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

Security Fix(es):

* An industry-wide issue was found in the way many modern microprocessor
designs have implemented speculative execution of Load & Store instructions
(a commonly used performance optimization). It relies on the presence of a
precisely-defined instruction sequence in the privileged code as well as
the fact that memory read from address to which a recent memory write has
occurred may see an older value and subsequently cause an update into the
microprocessor’s data cache even for speculatively executed instructions
that never actually commit (retire). As a result, an unprivileged attacker
could use this flaw to read privileged memory by conducting targeted cache
side-channel attacks. (CVE-2018-3639, PowerPC)

* kernel: net/packet: overflow in check for priv area size (CVE-2017-7308)

* kernel: AIO interface didn’t use rw_verify_area() for checking mandatory
locking on files and size of access (CVE-2012-6701)

* kernel: AIO write triggers integer overflow in some protocols
(CVE-2015-8830)

* kernel: Null pointer dereference via keyctl (CVE-2016-8650)

* kernel: ping socket / AF_LLC connect() sin_family race (CVE-2017-2671)

* kernel: Race condition between multiple sys_perf_event_open() calls
(CVE-2017-6001)

* kernel: Incorrect error handling in the set_mempolicy and mbind compat
syscalls in mm/mempolicy.c (CVE-2017-7616)

* kernel: mm subsystem does not properly enforce the CONFIG_STRICT_DEVMEM
protection mechanism (CVE-2017-7889)

* kernel: Double free in the inet_csk_clone_lock function in
net/ipv4/inet_connection_sock.c (CVE-2017-8890)

* kernel: net: sctp_v6_create_accept_sk function mishandles inheritance
(CVE-2017-9075)

* kernel: net: IPv6 DCCP implementation mishandles inheritance
(CVE-2017-9076)

* kernel: net: tcp_v6_syn_recv_sock function mishandles inheritance
(CVE-2017-9077)

* kernel: memory leak when merging buffers in SCSI IO vectors
(CVE-2017-12190)

* kernel: vfs: BUG in truncate_inode_pages_range() and fuse client
(CVE-2017-15121)

* kernel: Race condition in drivers/md/dm.c:dm_get_from_kobject() allows
local users to cause a denial of service (CVE-2017-18203)

* kernel: a null pointer dereference in net/dccp/output.c:dccp_write_xmit()
leads to a system crash (CVE-2018-1130)

* kernel: Missing length check of payload in
net/sctp/sm_make_chunk.c:_sctp_make_chunk() function allows denial of
service (CVE-2018-5803)

For more details about the security issue(s), including the impact, a CVSS
score, and other related information, refer to the CVE page(s) listed in
the References section.

Red Hat would like to thank Ken Johnson (Microsoft Security Response
Center) and Jann Horn (Google Project Zero) for reporting CVE-2018-3639;
Vitaly Mayatskih for reporting CVE-2017-12190; and Evgenii Shatokhin
(Virtuozzo Team) for reporting CVE-2018-1130. The CVE-2017-15121 issue was
discovered by Miklos Szeredi (Red Hat).

Additional Changes:

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 6.10 Release Notes and Red Hat Enterprise Linux 6.10
Technical Notes linked from 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/):

869942 – Kernel crashes on reading an ACL containing 190 ACEs over NFSv4
1314275 – CVE-2015-8830 kernel: AIO write triggers integer overflow in some protocols
1314288 – CVE-2012-6701 kernel: AIO interface didn’t use rw_verify_area() for checking mandatory locking on files and size of access
1395187 – CVE-2016-8650 kernel: Null pointer dereference via keyctl
1422825 – CVE-2017-6001 kernel: Race condition between multiple sys_perf_event_open() calls
1436649 – CVE-2017-2671 kernel: ping socket / AF_LLC connect() sin_family race
1437404 – CVE-2017-7308 kernel: net/packet: overflow in check for priv area size
1441088 – CVE-2017-7616 kernel: Incorrect error handling in the set_mempolicy and mbind compat syscalls in mm/mempolicy.c
1444493 – CVE-2017-7889 kernel: mm subsystem does not properly enforce the CONFIG_STRICT_DEVMEM protection mechanism
1448170 – RHEL6.9: sunrpc reconnect logic now may trigger a SYN storm when a TCP connection drops and a burst of RPC commands hit the transport
1450972 – CVE-2017-8890 kernel: Double free in the inet_csk_clone_lock function in net/ipv4/inet_connection_sock.c
1452688 – CVE-2017-9076 kernel: net: IPv6 DCCP implementation mishandles inheritance
1452691 – CVE-2017-9075 kernel: net: sctp_v6_create_accept_sk function mishandles inheritance
1452744 – CVE-2017-9077 kernel: net: tcp_v6_syn_recv_sock function mishandles inheritance
1495089 – CVE-2017-12190 kernel: memory leak when merging buffers in SCSI IO vectors
1497152 – systool causes panic on 2.6.32-696.6.3.el6.x86_64 using be2iscsi
1520893 – CVE-2017-15121 kernel: vfs: BUG in truncate_inode_pages_range() and fuse client
1550811 – CVE-2017-18203 kernel: Race condition in drivers/md/dm.c:dm_get_from_kobject() allows local users to cause a denial of service
1551051 – CVE-2018-5803 kernel: Missing length check of payload in net/sctp/sm_make_chunk.c:_sctp_make_chunk() function allows denial of service
1560494 – i686: Using invpcid_flush_all_nonglobals() can cause user-space panic on .i686
1566890 – CVE-2018-3639 hw: cpu: speculative store bypass
1576419 – CVE-2018-1130 kernel: a null pointer dereference in net/dccp/output.c:dccp_write_xmit() leads to a system crash

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
kernel-2.6.32-754.el6.src.rpm

i386:
kernel-2.6.32-754.el6.i686.rpm
kernel-debug-2.6.32-754.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-754.el6.i686.rpm
kernel-debug-devel-2.6.32-754.el6.i686.rpm
kernel-debuginfo-2.6.32-754.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-754.el6.i686.rpm
kernel-devel-2.6.32-754.el6.i686.rpm
kernel-headers-2.6.32-754.el6.i686.rpm
perf-2.6.32-754.el6.i686.rpm
perf-debuginfo-2.6.32-754.el6.i686.rpm
python-perf-debuginfo-2.6.32-754.el6.i686.rpm

noarch:
kernel-abi-whitelists-2.6.32-754.el6.noarch.rpm
kernel-doc-2.6.32-754.el6.noarch.rpm
kernel-firmware-2.6.32-754.el6.noarch.rpm

x86_64:
kernel-2.6.32-754.el6.x86_64.rpm
kernel-debug-2.6.32-754.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-754.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-754.el6.x86_64.rpm
kernel-debug-devel-2.6.32-754.el6.i686.rpm
kernel-debug-devel-2.6.32-754.el6.x86_64.rpm
kernel-debuginfo-2.6.32-754.el6.i686.rpm
kernel-debuginfo-2.6.32-754.el6.x86_64.rpm
kernel-debuginfo-common-i686-2.6.32-754.el6.i686.rpm
kernel-debuginfo-common-x86_64-2.6.32-754.el6.x86_64.rpm
kernel-devel-2.6.32-754.el6.x86_64.rpm
kernel-headers-2.6.32-754.el6.x86_64.rpm
perf-2.6.32-754.el6.x86_64.rpm
perf-debuginfo-2.6.32-754.el6.i686.rpm
perf-debuginfo-2.6.32-754.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-754.el6.i686.rpm
python-perf-debuginfo-2.6.32-754.el6.x86_64.rpm

Red Hat Enterprise Linux Desktop Optional (v. 6):

i386:
kernel-debug-debuginfo-2.6.32-754.el6.i686.rpm
kernel-debuginfo-2.6.32-754.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-754.el6.i686.rpm
perf-debuginfo-2.6.32-754.el6.i686.rpm
python-perf-2.6.32-754.el6.i686.rpm
python-perf-debuginfo-2.6.32-754.el6.i686.rpm

x86_64:
kernel-debug-debuginfo-2.6.32-754.el6.x86_64.rpm
kernel-debuginfo-2.6.32-754.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-754.el6.x86_64.rpm
perf-debuginfo-2.6.32-754.el6.x86_64.rpm
python-perf-2.6.32-754.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-754.el6.x86_64.rpm

Red Hat Enterprise Linux HPC Node (v. 6):

Source:
kernel-2.6.32-754.el6.src.rpm

noarch:
kernel-abi-whitelists-2.6.32-754.el6.noarch.rpm
kernel-doc-2.6.32-754.el6.noarch.rpm
kernel-firmware-2.6.32-754.el6.noarch.rpm

Red Hat Enterprise Linux HPC Node Optional (v. 6):

Red Hat Enterprise Linux Server (v. 6):

Source:
kernel-2.6.32-754.el6.src.rpm

noarch:
kernel-abi-whitelists-2.6.32-754.el6.noarch.rpm
kernel-doc-2.6.32-754.el6.noarch.rpm
kernel-firmware-2.6.32-754.el6.noarch.rpm

ppc64:
kernel-2.6.32-754.el6.ppc64.rpm
kernel-bootwrapper-2.6.32-754.el6.ppc64.rpm
kernel-debug-2.6.32-754.el6.ppc64.rpm
kernel-debug-debuginfo-2.6.32-754.el6.ppc64.rpm
kernel-debug-devel-2.6.32-754.el6.ppc64.rpm
kernel-debuginfo-2.6.32-754.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-754.el6.ppc64.rpm
kernel-devel-2.6.32-754.el6.ppc64.rpm
kernel-headers-2.6.32-754.el6.ppc64.rpm
perf-2.6.32-754.el6.ppc64.rpm
perf-debuginfo-2.6.32-754.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-754.el6.ppc64.rpm

s390x:
kernel-2.6.32-754.el6.s390x.rpm
kernel-debug-2.6.32-754.el6.s390x.rpm
kernel-debug-debuginfo-2.6.32-754.el6.s390x.rpm
kernel-debug-devel-2.6.32-754.el6.s390x.rpm
kernel-debuginfo-2.6.32-754.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-754.el6.s390x.rpm
kernel-devel-2.6.32-754.el6.s390x.rpm
kernel-headers-2.6.32-754.el6.s390x.rpm
kernel-kdump-2.6.32-754.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-754.el6.s390x.rpm
kernel-kdump-devel-2.6.32-754.el6.s390x.rpm
perf-2.6.32-754.el6.s390x.rpm
perf-debuginfo-2.6.32-754.el6.s390x.rpm
python-perf-debuginfo-2.6.32-754.el6.s390x.rpm

Red Hat Enterprise Linux Server Optional (v. 6):

ppc64:
kernel-debug-debuginfo-2.6.32-754.el6.ppc64.rpm
kernel-debuginfo-2.6.32-754.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-754.el6.ppc64.rpm
perf-debuginfo-2.6.32-754.el6.ppc64.rpm
python-perf-2.6.32-754.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-754.el6.ppc64.rpm

s390x:
kernel-debug-debuginfo-2.6.32-754.el6.s390x.rpm
kernel-debuginfo-2.6.32-754.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-754.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-754.el6.s390x.rpm
perf-debuginfo-2.6.32-754.el6.s390x.rpm
python-perf-2.6.32-754.el6.s390x.rpm
python-perf-debuginfo-2.6.32-754.el6.s390x.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
kernel-2.6.32-754.el6.src.rpm

noarch:
kernel-abi-whitelists-2.6.32-754.el6.noarch.rpm
kernel-doc-2.6.32-754.el6.noarch.rpm
kernel-firmware-2.6.32-754.el6.noarch.rpm

Red Hat Enterprise Linux Workstation Optional (v. 6):

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-2012-6701
https://access.redhat.com/security/cve/CVE-2015-8830
https://access.redhat.com/security/cve/CVE-2016-8650
https://access.redhat.com/security/cve/CVE-2017-2671
https://access.redhat.com/security/cve/CVE-2017-6001
https://access.redhat.com/security/cve/CVE-2017-7308
https://access.redhat.com/security/cve/CVE-2017-7616
https://access.redhat.com/security/cve/CVE-2017-7889
https://access.redhat.com/security/cve/CVE-2017-8890
https://access.redhat.com/security/cve/CVE-2017-9075
https://access.redhat.com/security/cve/CVE-2017-9076
https://access.redhat.com/security/cve/CVE-2017-9077
https://access.redhat.com/security/cve/CVE-2017-12190
https://access.redhat.com/security/cve/CVE-2017-15121
https://access.redhat.com/security/cve/CVE-2017-18203
https://access.redhat.com/security/cve/CVE-2018-1130
https://access.redhat.com/security/cve/CVE-2018-3639
https://access.redhat.com/security/cve/CVE-2018-5803
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/ssbd
https://access.redhat.com/documentation/en-US/red_hat_enterprise_linux/6/html/6.10_release_notes/index.html
https://access.redhat.com/documentation/en-US/red_hat_enterprise_linux/6/html/6.10_technical_notes/index.html

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

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