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Red Hat Security Advisory 2017-0403-01

Red Hat Security Advisory 2017-0403-01
Posted Mar 3, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-0403-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: A use-after-free flaw was found in the way the Linux kernel's Datagram Congestion Control Protocol implementation freed SKB resources for a DCCP_PKT_REQUEST packet when the IPV6_RECVPKTINFO option is set on the socket. A local, unprivileged user could use this flaw to alter the kernel memory, allowing them to escalate their privileges on the system.

tags | advisory, kernel, local, protocol
systems | linux, redhat
advisories | CVE-2017-6074
SHA-256 | 781af02e07eb075a3ac897044cb7330ea4e7546d0f2ef6445227d4d3667c7b16
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Red Hat Security Advisory 2017-0403-01

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

Synopsis:          Important: kernel security update
Advisory ID:       RHSA-2017:0403-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2017-0403.html
Issue date:        2017-03-02
CVE Names:         CVE-2017-6074 
=====================================================================

1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 7.1
Extended Update Support.

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 ComputeNode EUS (v. 7.1) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.1) - x86_64
Red Hat Enterprise Linux Server EUS (v. 7.1) - noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional EUS (v. 7.1) - ppc64, ppc64le, s390x, x86_64

3. Description:

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

Security Fix(es):

* A use-after-free flaw was found in the way the Linux kernel's Datagram
Congestion Control Protocol (DCCP) implementation freed SKB (socket buffer)
resources for a DCCP_PKT_REQUEST packet when the IPV6_RECVPKTINFO option is
set on the socket. A local, unprivileged user could use this flaw to alter
the kernel memory, allowing them to escalate their privileges on the
system. (CVE-2017-6074, Important)

Red Hat would like to thank Andrey Konovalov (Google) for reporting this
issue.

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/):

1423071 - CVE-2017-6074 kernel: use after free in dccp protocol

6. Package List:

Red Hat Enterprise Linux ComputeNode EUS (v. 7.1):

Source:
kernel-3.10.0-229.49.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-229.49.1.el7.noarch.rpm
kernel-doc-3.10.0-229.49.1.el7.noarch.rpm

x86_64:
kernel-3.10.0-229.49.1.el7.x86_64.rpm
kernel-debug-3.10.0-229.49.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-229.49.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-229.49.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-229.49.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-229.49.1.el7.x86_64.rpm
kernel-devel-3.10.0-229.49.1.el7.x86_64.rpm
kernel-headers-3.10.0-229.49.1.el7.x86_64.rpm
kernel-tools-3.10.0-229.49.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-229.49.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-229.49.1.el7.x86_64.rpm
perf-3.10.0-229.49.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-229.49.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-229.49.1.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.1):

x86_64:
kernel-debug-debuginfo-3.10.0-229.49.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-229.49.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-229.49.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-229.49.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-229.49.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-229.49.1.el7.x86_64.rpm
python-perf-3.10.0-229.49.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-229.49.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server EUS (v. 7.1):

Source:
kernel-3.10.0-229.49.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-229.49.1.el7.noarch.rpm
kernel-doc-3.10.0-229.49.1.el7.noarch.rpm

ppc64:
kernel-3.10.0-229.49.1.el7.ppc64.rpm
kernel-bootwrapper-3.10.0-229.49.1.el7.ppc64.rpm
kernel-debug-3.10.0-229.49.1.el7.ppc64.rpm
kernel-debug-debuginfo-3.10.0-229.49.1.el7.ppc64.rpm
kernel-debug-devel-3.10.0-229.49.1.el7.ppc64.rpm
kernel-debuginfo-3.10.0-229.49.1.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-229.49.1.el7.ppc64.rpm
kernel-devel-3.10.0-229.49.1.el7.ppc64.rpm
kernel-headers-3.10.0-229.49.1.el7.ppc64.rpm
kernel-tools-3.10.0-229.49.1.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-229.49.1.el7.ppc64.rpm
kernel-tools-libs-3.10.0-229.49.1.el7.ppc64.rpm
perf-3.10.0-229.49.1.el7.ppc64.rpm
perf-debuginfo-3.10.0-229.49.1.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-229.49.1.el7.ppc64.rpm

s390x:
kernel-3.10.0-229.49.1.el7.s390x.rpm
kernel-debug-3.10.0-229.49.1.el7.s390x.rpm
kernel-debug-debuginfo-3.10.0-229.49.1.el7.s390x.rpm
kernel-debug-devel-3.10.0-229.49.1.el7.s390x.rpm
kernel-debuginfo-3.10.0-229.49.1.el7.s390x.rpm
kernel-debuginfo-common-s390x-3.10.0-229.49.1.el7.s390x.rpm
kernel-devel-3.10.0-229.49.1.el7.s390x.rpm
kernel-headers-3.10.0-229.49.1.el7.s390x.rpm
kernel-kdump-3.10.0-229.49.1.el7.s390x.rpm
kernel-kdump-debuginfo-3.10.0-229.49.1.el7.s390x.rpm
kernel-kdump-devel-3.10.0-229.49.1.el7.s390x.rpm
perf-3.10.0-229.49.1.el7.s390x.rpm
perf-debuginfo-3.10.0-229.49.1.el7.s390x.rpm
python-perf-debuginfo-3.10.0-229.49.1.el7.s390x.rpm

x86_64:
kernel-3.10.0-229.49.1.el7.x86_64.rpm
kernel-debug-3.10.0-229.49.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-229.49.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-229.49.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-229.49.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-229.49.1.el7.x86_64.rpm
kernel-devel-3.10.0-229.49.1.el7.x86_64.rpm
kernel-headers-3.10.0-229.49.1.el7.x86_64.rpm
kernel-tools-3.10.0-229.49.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-229.49.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-229.49.1.el7.x86_64.rpm
perf-3.10.0-229.49.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-229.49.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-229.49.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server EUS (v. 7.1):

Source:
kernel-3.10.0-229.49.1.ael7b.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-229.49.1.ael7b.noarch.rpm
kernel-doc-3.10.0-229.49.1.ael7b.noarch.rpm

ppc64le:
kernel-3.10.0-229.49.1.ael7b.ppc64le.rpm
kernel-bootwrapper-3.10.0-229.49.1.ael7b.ppc64le.rpm
kernel-debug-3.10.0-229.49.1.ael7b.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-229.49.1.ael7b.ppc64le.rpm
kernel-debuginfo-3.10.0-229.49.1.ael7b.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-229.49.1.ael7b.ppc64le.rpm
kernel-devel-3.10.0-229.49.1.ael7b.ppc64le.rpm
kernel-headers-3.10.0-229.49.1.ael7b.ppc64le.rpm
kernel-tools-3.10.0-229.49.1.ael7b.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-229.49.1.ael7b.ppc64le.rpm
kernel-tools-libs-3.10.0-229.49.1.ael7b.ppc64le.rpm
perf-3.10.0-229.49.1.ael7b.ppc64le.rpm
perf-debuginfo-3.10.0-229.49.1.ael7b.ppc64le.rpm
python-perf-debuginfo-3.10.0-229.49.1.ael7b.ppc64le.rpm

Red Hat Enterprise Linux Server Optional EUS (v. 7.1):

ppc64:
kernel-debug-debuginfo-3.10.0-229.49.1.el7.ppc64.rpm
kernel-debuginfo-3.10.0-229.49.1.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-229.49.1.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-229.49.1.el7.ppc64.rpm
kernel-tools-libs-devel-3.10.0-229.49.1.el7.ppc64.rpm
perf-debuginfo-3.10.0-229.49.1.el7.ppc64.rpm
python-perf-3.10.0-229.49.1.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-229.49.1.el7.ppc64.rpm

s390x:
kernel-debug-debuginfo-3.10.0-229.49.1.el7.s390x.rpm
kernel-debuginfo-3.10.0-229.49.1.el7.s390x.rpm
kernel-debuginfo-common-s390x-3.10.0-229.49.1.el7.s390x.rpm
kernel-kdump-debuginfo-3.10.0-229.49.1.el7.s390x.rpm
perf-debuginfo-3.10.0-229.49.1.el7.s390x.rpm
python-perf-3.10.0-229.49.1.el7.s390x.rpm
python-perf-debuginfo-3.10.0-229.49.1.el7.s390x.rpm

x86_64:
kernel-debug-debuginfo-3.10.0-229.49.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-229.49.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-229.49.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-229.49.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-229.49.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-229.49.1.el7.x86_64.rpm
python-perf-3.10.0-229.49.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-229.49.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional EUS (v. 7.1):

ppc64le:
kernel-debug-debuginfo-3.10.0-229.49.1.ael7b.ppc64le.rpm
kernel-debug-devel-3.10.0-229.49.1.ael7b.ppc64le.rpm
kernel-debuginfo-3.10.0-229.49.1.ael7b.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-229.49.1.ael7b.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-229.49.1.ael7b.ppc64le.rpm
kernel-tools-libs-devel-3.10.0-229.49.1.ael7b.ppc64le.rpm
perf-debuginfo-3.10.0-229.49.1.ael7b.ppc64le.rpm
python-perf-3.10.0-229.49.1.ael7b.ppc64le.rpm
python-perf-debuginfo-3.10.0-229.49.1.ael7b.ppc64le.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-2017-6074
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/articles/2039563

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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