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AUSCERT External Security Bulletin Redistribution
ESB-2017.1169
Important: rhev-hypervisor bug fix and enhancement update for RHEV 3.6.11
10 May 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: rhev-hypervisor
Publisher: Red Hat
Operating System: Red Hat
Impact/Access: Root Compromise -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2017-6074
Reference: ASB-2017.0021
ESB-2017.1136
ESB-2017.0970
ESB-2017.0486
ESB-2017.0485
ESB-2017.0484
Original Bulletin:
https://access.redhat.com/errata/RHSA-2017:1209
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Red Hat Security Advisory
Synopsis: Important: rhev-hypervisor bug fix and enhancement update for RHEV 3.6.11
Advisory ID: RHSA-2017:1209-01
Product: Red Hat Virtualization
Advisory URL: https://access.redhat.com/errata/RHSA-2017:1209
Issue date: 2017-05-09
CVE Names: CVE-2017-6074
=====================================================================
1. Summary:
An update for rhev-hypervisor7 is now available for RHEV 3.X Hypervisor and
Agents for RHEL-6 and RHEV 3.X Hypervisor and Agents for RHEL-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:
RHEL 7-based RHEV-H - noarch
RHEV Hypervisor for RHEL-6 - noarch
3. Description:
The rhev-hypervisor package provides a Red Hat Enterprise Virtualization
Hypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor
is a dedicated Kernel-based Virtual Machine (KVM) hypervisor. It includes
everything necessary to run and manage virtual machines: A subset of the
Red Hat Enterprise Linux operating environment and the Red Hat Enterprise
Virtualization Agent.
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)
Red Hat would like to thank Andrey Konovalov (Google) for reporting this
issue.
Note: Red Hat Enterprise Virtualization Hypervisor is only available for
the Intel 64 and AMD64 architectures with virtualization extensions.
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
5. Bugs fixed (https://bugzilla.redhat.com/):
1423071 - CVE-2017-6074 kernel: use after free in dccp protocol
1434999 - Tracker bug for 3.6.11
6. Package List:
RHEV Hypervisor for RHEL-6:
Source:
rhev-hypervisor7-7.3-20170425.0.el6ev.src.rpm
noarch:
rhev-hypervisor7-7.3-20170425.0.el6ev.noarch.rpm
RHEL 7-based RHEV-H:
Source:
rhev-hypervisor7-7.3-20170425.0.el7ev.src.rpm
noarch:
rhev-hypervisor7-7.3-20170425.0.el7ev.noarch.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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