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AUSCERT External Security Bulletin Redistribution
ESB-2017.0486
Important: kernel-rt security update
23 February 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: kernel-rt
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 7
Impact/Access: Increased Privileges -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2017-6074
Original Bulletin:
https://rhn.redhat.com/errata/RHSA-2017-0295.html
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Red Hat Security Advisory
Synopsis: Important: kernel-rt security update
Advisory ID: RHSA-2017:0295-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2017-0295.html
Issue date: 2017-02-22
CVE Names: CVE-2017-6074
=====================================================================
1. Summary:
An update for kernel-rt 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 Realtime (v. 7) - noarch, x86_64
Red Hat Enterprise Linux for Real Time for NFV (v. 7) - noarch, x86_64
3. Description:
The kernel-rt packages provide the Real Time Linux Kernel, which enables
fine-tuning for systems with extremely high determinism requirements.
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)
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 for Real Time for NFV (v. 7):
Source:
kernel-rt-3.10.0-514.6.1.rt56.430.el7.src.rpm
noarch:
kernel-rt-doc-3.10.0-514.6.1.rt56.430.el7.noarch.rpm
x86_64:
kernel-rt-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-debug-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-debug-devel-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-debug-kvm-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-debug-kvm-debuginfo-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-debuginfo-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-devel-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-kvm-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-kvm-debuginfo-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-trace-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-trace-devel-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-trace-kvm-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-trace-kvm-debuginfo-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
Red Hat Enterprise Linux Realtime (v. 7):
Source:
kernel-rt-3.10.0-514.6.1.rt56.430.el7.src.rpm
noarch:
kernel-rt-doc-3.10.0-514.6.1.rt56.430.el7.noarch.rpm
x86_64:
kernel-rt-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-debug-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-debug-devel-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-debug-kvm-debuginfo-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-debuginfo-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-devel-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-kvm-debuginfo-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-trace-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-trace-devel-3.10.0-514.6.1.rt56.430.el7.x86_64.rpm
kernel-rt-trace-kvm-debuginfo-3.10.0-514.6.1.rt56.430.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-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/
Copyright 2017 Red Hat, Inc.
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