Sigurnosni nedostatak jezgre operacijskog sustava

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Red Hat Security Advisory

Synopsis: Important: kernel security and bug fix update
Advisory ID: RHSA-2017:0316-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2017-0316.html
Issue date: 2017-02-23
CVE Names: CVE-2017-6074
=====================================================================

1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 6.7
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 HPC Node EUS (v. 6.7) – noarch, x86_64
Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7) – x86_64
Red Hat Enterprise Linux Server EUS (v. 6.7) – i386, noarch, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional EUS (v. 6.7) – i386, ppc64, 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.

Bug Fix(es):

* When an NFS server received a compound Remote Procedure Call (RPC) with
multiple operations where the SECINFO operation was the ninth or later
operation, the server terminated unexpectedly. This update fixes the NFS
server to correctly initialize all arguments of all compound RPC operations
that are beyond the first eight operations. As a result, the NFS server no
longer crashes in the described situation. (BZ#1413035)

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 HPC Node EUS (v. 6.7):

Source:
kernel-2.6.32-573.40.1.el6.src.rpm

noarch:
kernel-abi-whitelists-2.6.32-573.40.1.el6.noarch.rpm
kernel-doc-2.6.32-573.40.1.el6.noarch.rpm
kernel-firmware-2.6.32-573.40.1.el6.noarch.rpm

x86_64:
kernel-2.6.32-573.40.1.el6.x86_64.rpm
kernel-debug-2.6.32-573.40.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-573.40.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-573.40.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-573.40.1.el6.i686.rpm
kernel-debug-devel-2.6.32-573.40.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-573.40.1.el6.i686.rpm
kernel-debuginfo-2.6.32-573.40.1.el6.x86_64.rpm
kernel-debuginfo-common-i686-2.6.32-573.40.1.el6.i686.rpm
kernel-debuginfo-common-x86_64-2.6.32-573.40.1.el6.x86_64.rpm
kernel-devel-2.6.32-573.40.1.el6.x86_64.rpm
kernel-headers-2.6.32-573.40.1.el6.x86_64.rpm
perf-2.6.32-573.40.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-573.40.1.el6.i686.rpm
perf-debuginfo-2.6.32-573.40.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-573.40.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-573.40.1.el6.x86_64.rpm

Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7):

x86_64:
kernel-debug-debuginfo-2.6.32-573.40.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-573.40.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-573.40.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-573.40.1.el6.x86_64.rpm
python-perf-2.6.32-573.40.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-573.40.1.el6.x86_64.rpm

Red Hat Enterprise Linux Server EUS (v. 6.7):

Source:
kernel-2.6.32-573.40.1.el6.src.rpm

i386:
kernel-2.6.32-573.40.1.el6.i686.rpm
kernel-debug-2.6.32-573.40.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-573.40.1.el6.i686.rpm
kernel-debug-devel-2.6.32-573.40.1.el6.i686.rpm
kernel-debuginfo-2.6.32-573.40.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-573.40.1.el6.i686.rpm
kernel-devel-2.6.32-573.40.1.el6.i686.rpm
kernel-headers-2.6.32-573.40.1.el6.i686.rpm
perf-2.6.32-573.40.1.el6.i686.rpm
perf-debuginfo-2.6.32-573.40.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-573.40.1.el6.i686.rpm

noarch:
kernel-abi-whitelists-2.6.32-573.40.1.el6.noarch.rpm
kernel-doc-2.6.32-573.40.1.el6.noarch.rpm
kernel-firmware-2.6.32-573.40.1.el6.noarch.rpm

ppc64:
kernel-2.6.32-573.40.1.el6.ppc64.rpm
kernel-bootwrapper-2.6.32-573.40.1.el6.ppc64.rpm
kernel-debug-2.6.32-573.40.1.el6.ppc64.rpm
kernel-debug-debuginfo-2.6.32-573.40.1.el6.ppc64.rpm
kernel-debug-devel-2.6.32-573.40.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-573.40.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-573.40.1.el6.ppc64.rpm
kernel-devel-2.6.32-573.40.1.el6.ppc64.rpm
kernel-headers-2.6.32-573.40.1.el6.ppc64.rpm
perf-2.6.32-573.40.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-573.40.1.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-573.40.1.el6.ppc64.rpm

s390x:
kernel-2.6.32-573.40.1.el6.s390x.rpm
kernel-debug-2.6.32-573.40.1.el6.s390x.rpm
kernel-debug-debuginfo-2.6.32-573.40.1.el6.s390x.rpm
kernel-debug-devel-2.6.32-573.40.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-573.40.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-573.40.1.el6.s390x.rpm
kernel-devel-2.6.32-573.40.1.el6.s390x.rpm
kernel-headers-2.6.32-573.40.1.el6.s390x.rpm
kernel-kdump-2.6.32-573.40.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-573.40.1.el6.s390x.rpm
kernel-kdump-devel-2.6.32-573.40.1.el6.s390x.rpm
perf-2.6.32-573.40.1.el6.s390x.rpm
perf-debuginfo-2.6.32-573.40.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-573.40.1.el6.s390x.rpm

Red Hat Enterprise Linux Server Optional EUS (v. 6.7):

i386:
kernel-debug-debuginfo-2.6.32-573.40.1.el6.i686.rpm
kernel-debuginfo-2.6.32-573.40.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-573.40.1.el6.i686.rpm
perf-debuginfo-2.6.32-573.40.1.el6.i686.rpm
python-perf-2.6.32-573.40.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-573.40.1.el6.i686.rpm

ppc64:
kernel-debug-debuginfo-2.6.32-573.40.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-573.40.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-573.40.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-573.40.1.el6.ppc64.rpm
python-perf-2.6.32-573.40.1.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-573.40.1.el6.ppc64.rpm

s390x:
kernel-debug-debuginfo-2.6.32-573.40.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-573.40.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-573.40.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-573.40.1.el6.s390x.rpm
perf-debuginfo-2.6.32-573.40.1.el6.s390x.rpm
python-perf-2.6.32-573.40.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-573.40.1.el6.s390x.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

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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