Protect yourself against future threats.
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===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2017.0522
Important: kernel security update
27 February 2017
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: kernel
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 5
Red Hat Enterprise Linux WS/Desktop 5
Red Hat Enterprise Linux Server 6
Red Hat Enterprise Linux WS/Desktop 6
Impact/Access: Root Compromise -- Existing Account
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2017-6074 CVE-2017-2634
Reference: ESB-2017.0508
ESB-2017.0485
ESB-2017.0484
Original Bulletin:
https://rhn.redhat.com/errata/RHSA-2017-0323.html
https://rhn.redhat.com/errata/RHSA-2017-0324.html
Comment: This bulletin contains two (2) Red Hat security advisories.
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=====================================================================
Red Hat Security Advisory
Synopsis: Important: kernel security update
Advisory ID: RHSA-2017:0323-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2017-0323.html
Issue date: 2017-02-24
CVE Names: CVE-2017-2634 CVE-2017-6074
=====================================================================
1. Summary:
An update for kernel is now available for Red Hat Enterprise Linux 5.
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 (v. 5 server) - i386, ia64, noarch, ppc, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, noarch, 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)
* It was found that the Linux kernel's Datagram Congestion Control Protocol
(DCCP) implementation used the IPv4-only inet_sk_rebuild_header() function
for both IPv4 and IPv6 DCCP connections, which could result in memory
corruptions. A remote attacker could use this flaw to crash the system.
(CVE-2017-2634, Moderate)
Important: This update disables the DCCP kernel module at load time by
using the kernel module blacklist method. The module is disabled in an
attempt to reduce further exposure to additional issues. Please see Red Hat
Bugzilla (BZ#1425177) for additional information.
Red Hat would like to thank Andrey Konovalov (Google) for reporting
CVE-2017-6074. The CVE-2017-2634 issue was discovered by Wade Mealing (Red
Hat Product Security).
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
1424751 - CVE-2017-2634 kernel: dccp: crash while sending ipv6 reset packet
6. Package List:
Red Hat Enterprise Linux Desktop (v. 5 client):
Source:
kernel-2.6.18-419.el5.src.rpm
i386:
kernel-2.6.18-419.el5.i686.rpm
kernel-PAE-2.6.18-419.el5.i686.rpm
kernel-PAE-debuginfo-2.6.18-419.el5.i686.rpm
kernel-PAE-devel-2.6.18-419.el5.i686.rpm
kernel-debug-2.6.18-419.el5.i686.rpm
kernel-debug-debuginfo-2.6.18-419.el5.i686.rpm
kernel-debug-devel-2.6.18-419.el5.i686.rpm
kernel-debuginfo-2.6.18-419.el5.i686.rpm
kernel-debuginfo-common-2.6.18-419.el5.i686.rpm
kernel-devel-2.6.18-419.el5.i686.rpm
kernel-headers-2.6.18-419.el5.i386.rpm
kernel-xen-2.6.18-419.el5.i686.rpm
kernel-xen-debuginfo-2.6.18-419.el5.i686.rpm
kernel-xen-devel-2.6.18-419.el5.i686.rpm
noarch:
kernel-doc-2.6.18-419.el5.noarch.rpm
x86_64:
kernel-2.6.18-419.el5.x86_64.rpm
kernel-debug-2.6.18-419.el5.x86_64.rpm
kernel-debug-debuginfo-2.6.18-419.el5.x86_64.rpm
kernel-debug-devel-2.6.18-419.el5.x86_64.rpm
kernel-debuginfo-2.6.18-419.el5.x86_64.rpm
kernel-debuginfo-common-2.6.18-419.el5.x86_64.rpm
kernel-devel-2.6.18-419.el5.x86_64.rpm
kernel-headers-2.6.18-419.el5.x86_64.rpm
kernel-xen-2.6.18-419.el5.x86_64.rpm
kernel-xen-debuginfo-2.6.18-419.el5.x86_64.rpm
kernel-xen-devel-2.6.18-419.el5.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
kernel-2.6.18-419.el5.src.rpm
i386:
kernel-2.6.18-419.el5.i686.rpm
kernel-PAE-2.6.18-419.el5.i686.rpm
kernel-PAE-debuginfo-2.6.18-419.el5.i686.rpm
kernel-PAE-devel-2.6.18-419.el5.i686.rpm
kernel-debug-2.6.18-419.el5.i686.rpm
kernel-debug-debuginfo-2.6.18-419.el5.i686.rpm
kernel-debug-devel-2.6.18-419.el5.i686.rpm
kernel-debuginfo-2.6.18-419.el5.i686.rpm
kernel-debuginfo-common-2.6.18-419.el5.i686.rpm
kernel-devel-2.6.18-419.el5.i686.rpm
kernel-headers-2.6.18-419.el5.i386.rpm
kernel-xen-2.6.18-419.el5.i686.rpm
kernel-xen-debuginfo-2.6.18-419.el5.i686.rpm
kernel-xen-devel-2.6.18-419.el5.i686.rpm
ia64:
kernel-2.6.18-419.el5.ia64.rpm
kernel-debug-2.6.18-419.el5.ia64.rpm
kernel-debug-debuginfo-2.6.18-419.el5.ia64.rpm
kernel-debug-devel-2.6.18-419.el5.ia64.rpm
kernel-debuginfo-2.6.18-419.el5.ia64.rpm
kernel-debuginfo-common-2.6.18-419.el5.ia64.rpm
kernel-devel-2.6.18-419.el5.ia64.rpm
kernel-headers-2.6.18-419.el5.ia64.rpm
kernel-xen-2.6.18-419.el5.ia64.rpm
kernel-xen-debuginfo-2.6.18-419.el5.ia64.rpm
kernel-xen-devel-2.6.18-419.el5.ia64.rpm
noarch:
kernel-doc-2.6.18-419.el5.noarch.rpm
ppc:
kernel-2.6.18-419.el5.ppc64.rpm
kernel-debug-2.6.18-419.el5.ppc64.rpm
kernel-debug-debuginfo-2.6.18-419.el5.ppc64.rpm
kernel-debug-devel-2.6.18-419.el5.ppc64.rpm
kernel-debuginfo-2.6.18-419.el5.ppc64.rpm
kernel-debuginfo-common-2.6.18-419.el5.ppc64.rpm
kernel-devel-2.6.18-419.el5.ppc64.rpm
kernel-headers-2.6.18-419.el5.ppc.rpm
kernel-headers-2.6.18-419.el5.ppc64.rpm
kernel-kdump-2.6.18-419.el5.ppc64.rpm
kernel-kdump-debuginfo-2.6.18-419.el5.ppc64.rpm
kernel-kdump-devel-2.6.18-419.el5.ppc64.rpm
s390x:
kernel-2.6.18-419.el5.s390x.rpm
kernel-debug-2.6.18-419.el5.s390x.rpm
kernel-debug-debuginfo-2.6.18-419.el5.s390x.rpm
kernel-debug-devel-2.6.18-419.el5.s390x.rpm
kernel-debuginfo-2.6.18-419.el5.s390x.rpm
kernel-debuginfo-common-2.6.18-419.el5.s390x.rpm
kernel-devel-2.6.18-419.el5.s390x.rpm
kernel-headers-2.6.18-419.el5.s390x.rpm
kernel-kdump-2.6.18-419.el5.s390x.rpm
kernel-kdump-debuginfo-2.6.18-419.el5.s390x.rpm
kernel-kdump-devel-2.6.18-419.el5.s390x.rpm
x86_64:
kernel-2.6.18-419.el5.x86_64.rpm
kernel-debug-2.6.18-419.el5.x86_64.rpm
kernel-debug-debuginfo-2.6.18-419.el5.x86_64.rpm
kernel-debug-devel-2.6.18-419.el5.x86_64.rpm
kernel-debuginfo-2.6.18-419.el5.x86_64.rpm
kernel-debuginfo-common-2.6.18-419.el5.x86_64.rpm
kernel-devel-2.6.18-419.el5.x86_64.rpm
kernel-headers-2.6.18-419.el5.x86_64.rpm
kernel-xen-2.6.18-419.el5.x86_64.rpm
kernel-xen-debuginfo-2.6.18-419.el5.x86_64.rpm
kernel-xen-devel-2.6.18-419.el5.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-2017-2634
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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Hash: SHA1
=====================================================================
Red Hat Security Advisory
Synopsis: Important: kernel security update
Advisory ID: RHSA-2017:0324-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2017-0324.html
Issue date: 2017-02-24
CVE Names: CVE-2017-6074
=====================================================================
1. Summary:
An update for kernel is now available for Red Hat Enterprise Linux 6.6
Advanced Update Support and Red Hat Enterprise Linux 6.6 Telco 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 Server AUS (v. 6.6) - noarch, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 6.6) - x86_64
Red Hat Enterprise Linux Server Optional TUS (v. 6.6) - x86_64
Red Hat Enterprise Linux Server TUS (v. 6.6) - noarch, 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 Server AUS (v. 6.6):
Source:
kernel-2.6.32-504.57.1.el6.src.rpm
noarch:
kernel-abi-whitelists-2.6.32-504.57.1.el6.noarch.rpm
kernel-doc-2.6.32-504.57.1.el6.noarch.rpm
kernel-firmware-2.6.32-504.57.1.el6.noarch.rpm
x86_64:
kernel-2.6.32-504.57.1.el6.x86_64.rpm
kernel-debug-2.6.32-504.57.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-504.57.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-504.57.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-504.57.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-504.57.1.el6.x86_64.rpm
kernel-devel-2.6.32-504.57.1.el6.x86_64.rpm
kernel-headers-2.6.32-504.57.1.el6.x86_64.rpm
perf-2.6.32-504.57.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-504.57.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-504.57.1.el6.x86_64.rpm
Red Hat Enterprise Linux Server TUS (v. 6.6):
Source:
kernel-2.6.32-504.57.1.el6.src.rpm
noarch:
kernel-abi-whitelists-2.6.32-504.57.1.el6.noarch.rpm
kernel-doc-2.6.32-504.57.1.el6.noarch.rpm
kernel-firmware-2.6.32-504.57.1.el6.noarch.rpm
x86_64:
kernel-2.6.32-504.57.1.el6.x86_64.rpm
kernel-debug-2.6.32-504.57.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-504.57.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-504.57.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-504.57.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-504.57.1.el6.x86_64.rpm
kernel-devel-2.6.32-504.57.1.el6.x86_64.rpm
kernel-headers-2.6.32-504.57.1.el6.x86_64.rpm
perf-2.6.32-504.57.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-504.57.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-504.57.1.el6.x86_64.rpm
Red Hat Enterprise Linux Server Optional AUS (v. 6.6):
x86_64:
kernel-debug-debuginfo-2.6.32-504.57.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-504.57.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-504.57.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-504.57.1.el6.x86_64.rpm
python-perf-2.6.32-504.57.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-504.57.1.el6.x86_64.rpm
Red Hat Enterprise Linux Server Optional TUS (v. 6.6):
x86_64:
kernel-debug-debuginfo-2.6.32-504.57.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-504.57.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-504.57.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-504.57.1.el6.x86_64.rpm
python-perf-2.6.32-504.57.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-504.57.1.el6.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
https://access.redhat.com/security/vulnerabilities/2706661
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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