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===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2017.1344
Important: kernel security, bug fix, and enhancement update
26 May 2017
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: kernel
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 7
Red Hat Enterprise Linux WS/Desktop 7
Impact/Access: Root Compromise -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2017-7308 CVE-2017-5986 CVE-2016-10208
CVE-2016-8646 CVE-2016-7910
Reference: ASB-2016.0103
ESB-2017.1304
ESB-2017.0273
ESB-2016.2687
Original Bulletin:
https://access.redhat.com/errata/RHSA-2017:1308
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=====================================================================
Red Hat Security Advisory
Synopsis: Important: kernel security, bug fix, and enhancement update
Advisory ID: RHSA-2017:1308-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:1308
Issue date: 2017-05-25
CVE Names: CVE-2016-10208 CVE-2016-7910 CVE-2016-8646
CVE-2017-5986 CVE-2017-7308
=====================================================================
1. Summary:
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.
2. Relevant releases/architectures:
Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64
Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64
3. Description:
The kernel packages contain the Linux kernel, the core of any Linux
operating system.
Security Fix(es):
* It was found that the packet_set_ring() function of the Linux kernel's
networking implementation did not properly validate certain block-size
data. A local attacker with CAP_NET_RAW capability could use this flaw to
trigger a buffer overflow, resulting in the crash of the system. Due to the
nature of the flaw, privilege escalation cannot be fully ruled out.
(CVE-2017-7308, Important)
* Mounting a crafted EXT4 image read-only leads to an attacker controlled
memory corruption and SLAB-Out-of-Bounds reads. (CVE-2016-10208, Moderate)
* A flaw was found in the Linux kernel's implementation of seq_file where a
local attacker could manipulate memory in the put() function pointer. This
could lead to memory corruption and possible privileged escalation.
(CVE-2016-7910, Moderate)
* A vulnerability was found in the Linux kernel. An unprivileged local user
could trigger oops in shash_async_export() by attempting to force the
in-kernel hashing algorithms into decrypting an empty data set.
(CVE-2016-8646, Moderate)
* It was reported that with Linux kernel, earlier than version v4.10-rc8,
an application may trigger a BUG_ON in sctp_wait_for_sndbuf if the socket
tx buffer is full, a thread is waiting on it to queue more data, and
meanwhile another thread peels off the association being used by the first
thread. (CVE-2017-5986, Moderate)
Red Hat would like to thank Igor Redko (Virtuozzo kernel team) for
reporting CVE-2016-8646.
Additional Changes:
This update also fixes several bugs and adds various enhancements.
Documentation for these changes is available from the Technical Notes
document linked to 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/):
1388821 - CVE-2016-8646 kernel: Oops in shash_async_export()
1395190 - CVE-2016-10208 kernel: EXT4 memory corruption / SLAB out-of-bounds read
1399727 - CVE-2016-7910 kernel: Use after free in seq file
1420276 - CVE-2017-5986 kernel: Reachable BUG_ON from userspace in sctp_wait_for_sndbuf
1437404 - CVE-2017-7308 kernel: net/packet: overflow in check for priv area size
6. Package List:
Red Hat Enterprise Linux Client (v. 7):
Source:
kernel-3.10.0-514.21.1.el7.src.rpm
noarch:
kernel-abi-whitelists-3.10.0-514.21.1.el7.noarch.rpm
kernel-doc-3.10.0-514.21.1.el7.noarch.rpm
x86_64:
kernel-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debug-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-514.21.1.el7.x86_64.rpm
kernel-devel-3.10.0-514.21.1.el7.x86_64.rpm
kernel-headers-3.10.0-514.21.1.el7.x86_64.rpm
kernel-tools-3.10.0-514.21.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-514.21.1.el7.x86_64.rpm
perf-3.10.0-514.21.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
python-perf-3.10.0-514.21.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64:
kernel-debug-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-514.21.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-514.21.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source:
kernel-3.10.0-514.21.1.el7.src.rpm
noarch:
kernel-abi-whitelists-3.10.0-514.21.1.el7.noarch.rpm
kernel-doc-3.10.0-514.21.1.el7.noarch.rpm
x86_64:
kernel-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debug-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-514.21.1.el7.x86_64.rpm
kernel-devel-3.10.0-514.21.1.el7.x86_64.rpm
kernel-headers-3.10.0-514.21.1.el7.x86_64.rpm
kernel-tools-3.10.0-514.21.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-514.21.1.el7.x86_64.rpm
perf-3.10.0-514.21.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
python-perf-3.10.0-514.21.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
x86_64:
kernel-debug-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-514.21.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-514.21.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source:
kernel-3.10.0-514.21.1.el7.src.rpm
noarch:
kernel-abi-whitelists-3.10.0-514.21.1.el7.noarch.rpm
kernel-doc-3.10.0-514.21.1.el7.noarch.rpm
ppc64:
kernel-3.10.0-514.21.1.el7.ppc64.rpm
kernel-bootwrapper-3.10.0-514.21.1.el7.ppc64.rpm
kernel-debug-3.10.0-514.21.1.el7.ppc64.rpm
kernel-debug-debuginfo-3.10.0-514.21.1.el7.ppc64.rpm
kernel-debug-devel-3.10.0-514.21.1.el7.ppc64.rpm
kernel-debuginfo-3.10.0-514.21.1.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-514.21.1.el7.ppc64.rpm
kernel-devel-3.10.0-514.21.1.el7.ppc64.rpm
kernel-headers-3.10.0-514.21.1.el7.ppc64.rpm
kernel-tools-3.10.0-514.21.1.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-514.21.1.el7.ppc64.rpm
kernel-tools-libs-3.10.0-514.21.1.el7.ppc64.rpm
perf-3.10.0-514.21.1.el7.ppc64.rpm
perf-debuginfo-3.10.0-514.21.1.el7.ppc64.rpm
python-perf-3.10.0-514.21.1.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-514.21.1.el7.ppc64.rpm
ppc64le:
kernel-3.10.0-514.21.1.el7.ppc64le.rpm
kernel-bootwrapper-3.10.0-514.21.1.el7.ppc64le.rpm
kernel-debug-3.10.0-514.21.1.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-514.21.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-514.21.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-514.21.1.el7.ppc64le.rpm
kernel-devel-3.10.0-514.21.1.el7.ppc64le.rpm
kernel-headers-3.10.0-514.21.1.el7.ppc64le.rpm
kernel-tools-3.10.0-514.21.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-514.21.1.el7.ppc64le.rpm
kernel-tools-libs-3.10.0-514.21.1.el7.ppc64le.rpm
perf-3.10.0-514.21.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-514.21.1.el7.ppc64le.rpm
python-perf-3.10.0-514.21.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-514.21.1.el7.ppc64le.rpm
s390x:
kernel-3.10.0-514.21.1.el7.s390x.rpm
kernel-debug-3.10.0-514.21.1.el7.s390x.rpm
kernel-debug-debuginfo-3.10.0-514.21.1.el7.s390x.rpm
kernel-debug-devel-3.10.0-514.21.1.el7.s390x.rpm
kernel-debuginfo-3.10.0-514.21.1.el7.s390x.rpm
kernel-debuginfo-common-s390x-3.10.0-514.21.1.el7.s390x.rpm
kernel-devel-3.10.0-514.21.1.el7.s390x.rpm
kernel-headers-3.10.0-514.21.1.el7.s390x.rpm
kernel-kdump-3.10.0-514.21.1.el7.s390x.rpm
kernel-kdump-debuginfo-3.10.0-514.21.1.el7.s390x.rpm
kernel-kdump-devel-3.10.0-514.21.1.el7.s390x.rpm
perf-3.10.0-514.21.1.el7.s390x.rpm
perf-debuginfo-3.10.0-514.21.1.el7.s390x.rpm
python-perf-3.10.0-514.21.1.el7.s390x.rpm
python-perf-debuginfo-3.10.0-514.21.1.el7.s390x.rpm
x86_64:
kernel-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debug-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-514.21.1.el7.x86_64.rpm
kernel-devel-3.10.0-514.21.1.el7.x86_64.rpm
kernel-headers-3.10.0-514.21.1.el7.x86_64.rpm
kernel-tools-3.10.0-514.21.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-514.21.1.el7.x86_64.rpm
perf-3.10.0-514.21.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
python-perf-3.10.0-514.21.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 7):
ppc64:
kernel-debug-debuginfo-3.10.0-514.21.1.el7.ppc64.rpm
kernel-debuginfo-3.10.0-514.21.1.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-514.21.1.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-514.21.1.el7.ppc64.rpm
kernel-tools-libs-devel-3.10.0-514.21.1.el7.ppc64.rpm
perf-debuginfo-3.10.0-514.21.1.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-514.21.1.el7.ppc64.rpm
ppc64le:
kernel-debug-debuginfo-3.10.0-514.21.1.el7.ppc64le.rpm
kernel-debug-devel-3.10.0-514.21.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-514.21.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-514.21.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-514.21.1.el7.ppc64le.rpm
kernel-tools-libs-devel-3.10.0-514.21.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-514.21.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-514.21.1.el7.ppc64le.rpm
x86_64:
kernel-debug-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-514.21.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-514.21.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source:
kernel-3.10.0-514.21.1.el7.src.rpm
noarch:
kernel-abi-whitelists-3.10.0-514.21.1.el7.noarch.rpm
kernel-doc-3.10.0-514.21.1.el7.noarch.rpm
x86_64:
kernel-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debug-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-514.21.1.el7.x86_64.rpm
kernel-devel-3.10.0-514.21.1.el7.x86_64.rpm
kernel-headers-3.10.0-514.21.1.el7.x86_64.rpm
kernel-tools-3.10.0-514.21.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-514.21.1.el7.x86_64.rpm
perf-3.10.0-514.21.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
python-perf-3.10.0-514.21.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 7):
x86_64:
kernel-debug-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-514.21.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-514.21.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-514.21.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-514.21.1.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-2016-10208
https://access.redhat.com/security/cve/CVE-2016-7910
https://access.redhat.com/security/cve/CVE-2016-8646
https://access.redhat.com/security/cve/CVE-2017-5986
https://access.redhat.com/security/cve/CVE-2017-7308
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/articles/3034221
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2017 Red Hat, Inc.
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