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===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2017.2762
Linux kernel vulnerabilities
1 November 2017
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: kernel
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Access Confidential Data -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2017-15537 CVE-2017-14991 CVE-2017-14489
CVE-2017-14340 CVE-2017-14156 CVE-2017-14051
CVE-2017-12192 CVE-2017-12154 CVE-2017-12153
CVE-2017-10911 CVE-2017-9985 CVE-2017-9984
Reference: ESB-2017.2401
ESB-2017.2751
ESB-2017.1827
ESB-2017.1706
Original Bulletin:
http://www.ubuntu.com/usn/usn-3469-1
http://www.ubuntu.com/usn/usn-3469-2
Comment: This bulletin contains two (2) Ubuntu security advisories.
- --------------------------BEGIN INCLUDED TEXT--------------------
==========================================================================
Ubuntu Security Notice USN-3469-1
October 31, 2017
linux, linux-aws, linux-gke, linux-kvm, linux-raspi2, linux-snapdragon
vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- - Ubuntu 16.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description:
- - linux: Linux kernel
- - linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- - linux-gke: Linux kernel for Google Container Engine (GKE) systems
- - linux-kvm: Linux kernel for cloud environments
- - linux-raspi2: Linux kernel for Raspberry Pi 2
- - linux-snapdragon: Linux kernel for Snapdragon processors
Details:
Anthony Perard discovered that the Xen virtual block driver did not
properly initialize some data structures before passing them to user space.
A local attacker in a guest VM could use this to expose sensitive
information from the host OS or other guest VMs. (CVE-2017-10911)
Bo Zhang discovered that the netlink wireless configuration interface in
the Linux kernel did not properly validate attributes when handling certain
requests. A local attacker with the CAP_NET_ADMIN could use this to cause a
denial of service (system crash). (CVE-2017-12153)
It was discovered that the nested KVM implementation in the Linux
kernel in some situations did not properly prevent second level guests
from reading and writing the hardware CR8 register. A local attacker
in a guest could use this to cause a denial of service (system crash).
It was discovered that the key management subsystem in the Linux kernel
did not properly restrict key reads on negatively instantiated keys. A
local attacker could use this to cause a denial of service (system crash).
(CVE-2017-12192)
It was discovered that an integer overflow existed in the sysfs interface
for the QLogic 24xx+ series SCSI driver in the Linux kernel. A local
privileged attacker could use this to cause a denial of service (system
crash). (CVE-2017-14051)
It was discovered that the ATI Radeon framebuffer driver in the Linux
kernel did not properly initialize a data structure returned to user space.
A local attacker could use this to expose sensitive information (kernel
memory). (CVE-2017-14156)
Dave Chinner discovered that the XFS filesystem did not enforce that the
realtime inode flag was settable only on filesystems on a realtime device.
A local attacker could use this to cause a denial of service (system
crash). (CVE-2017-14340)
ChunYu Wang discovered that the iSCSI transport implementation in the Linux
kernel did not properly validate data structures. A local attacker could
use this to cause a denial of service (system crash). (CVE-2017-14489)
It was discovered that the generic SCSI driver in the Linux kernel did not
properly initialize data returned to user space in some situations. A local
attacker could use this to expose sensitive information (kernel memory).
(CVE-2017-14991)
Dmitry Vyukov discovered that the Floating Point Unit (fpu) subsystem in
the Linux kernel did not properly handle attempts to set reserved bits in a
task's extended state (xstate) area. A local attacker could use this to
cause a denial of service (system crash). (CVE-2017-15537)
Pengfei Wang discovered that the Turtle Beach MultiSound audio device
driver in the Linux kernel contained race conditions when fetching
from the ring-buffer. A local attacker could use this to cause a
denial of service (infinite loop). (CVE-2017-9984, CVE-2017-9985)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 16.04 LTS:
linux-image-4.4.0-1009-kvm 4.4.0-1009.14
linux-image-4.4.0-1033-gke 4.4.0-1033.33
linux-image-4.4.0-1039-aws 4.4.0-1039.48
linux-image-4.4.0-1076-raspi2 4.4.0-1076.84
linux-image-4.4.0-1078-snapdragon 4.4.0-1078.83
linux-image-4.4.0-98-generic 4.4.0-98.121
linux-image-4.4.0-98-generic-lpae 4.4.0-98.121
linux-image-4.4.0-98-lowlatency 4.4.0-98.121
linux-image-4.4.0-98-powerpc-e500mc 4.4.0-98.121
linux-image-4.4.0-98-powerpc-smp 4.4.0-98.121
linux-image-4.4.0-98-powerpc64-emb 4.4.0-98.121
linux-image-4.4.0-98-powerpc64-smp 4.4.0-98.121
linux-image-aws 4.4.0.1039.41
linux-image-generic 4.4.0.98.103
linux-image-generic-lpae 4.4.0.98.103
linux-image-gke 4.4.0.1033.34
linux-image-kvm 4.4.0.1009.9
linux-image-lowlatency 4.4.0.98.103
linux-image-powerpc-e500mc 4.4.0.98.103
linux-image-powerpc-smp 4.4.0.98.103
linux-image-powerpc64-emb 4.4.0.98.103
linux-image-powerpc64-smp 4.4.0.98.103
linux-image-raspi2 4.4.0.1076.76
linux-image-snapdragon 4.4.0.1078.70
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.
References:
https://www.ubuntu.com/usn/usn-3469-1
CVE-2017-10911, CVE-2017-12153, CVE-2017-12154, CVE-2017-12192,
CVE-2017-14051, CVE-2017-14156, CVE-2017-14340, CVE-2017-14489,
CVE-2017-14991, CVE-2017-15537, CVE-2017-9984, CVE-2017-9985
Package Information:
https://launchpad.net/ubuntu/+source/linux/4.4.0-98.121
https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1039.48
https://launchpad.net/ubuntu/+source/linux-gke/4.4.0-1033.33
https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1009.14
https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1076.84
https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1078.83
==========================================================================
Ubuntu Security Notice USN-3469-2
October 31, 2017
linux-lts-xenial vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- - Ubuntu 14.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description:
- - linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty
Details:
USN-3469-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
14.04 LTS.
Anthony Perard discovered that the Xen virtual block driver did not
properly initialize some data structures before passing them to user space.
A local attacker in a guest VM could use this to expose sensitive
information from the host OS or other guest VMs. (CVE-2017-10911)
Bo Zhang discovered that the netlink wireless configuration interface in
the Linux kernel did not properly validate attributes when handling certain
requests. A local attacker with the CAP_NET_ADMIN could use this to cause a
denial of service (system crash). (CVE-2017-12153)
It was discovered that the nested KVM implementation in the Linux
kernel in some situations did not properly prevent second level guests
from reading and writing the hardware CR8 register. A local attacker
in a guest could use this to cause a denial of service (system crash).
It was discovered that the key management subsystem in the Linux kernel
did not properly restrict key reads on negatively instantiated keys. A
local attacker could use this to cause a denial of service (system crash).
(CVE-2017-12192)
It was discovered that an integer overflow existed in the sysfs interface
for the QLogic 24xx+ series SCSI driver in the Linux kernel. A local
privileged attacker could use this to cause a denial of service (system
crash). (CVE-2017-14051)
It was discovered that the ATI Radeon framebuffer driver in the Linux
kernel did not properly initialize a data structure returned to user space.
A local attacker could use this to expose sensitive information (kernel
memory). (CVE-2017-14156)
Dave Chinner discovered that the XFS filesystem did not enforce that the
realtime inode flag was settable only on filesystems on a realtime device.
A local attacker could use this to cause a denial of service (system
crash). (CVE-2017-14340)
ChunYu Wang discovered that the iSCSI transport implementation in the Linux
kernel did not properly validate data structures. A local attacker could
use this to cause a denial of service (system crash). (CVE-2017-14489)
It was discovered that the generic SCSI driver in the Linux kernel did not
properly initialize data returned to user space in some situations. A local
attacker could use this to expose sensitive information (kernel memory).
(CVE-2017-14991)
Dmitry Vyukov discovered that the Floating Point Unit (fpu) subsystem in
the Linux kernel did not properly handle attempts to set reserved bits in a
task's extended state (xstate) area. A local attacker could use this to
cause a denial of service (system crash). (CVE-2017-15537)
Pengfei Wang discovered that the Turtle Beach MultiSound audio device
driver in the Linux kernel contained race conditions when fetching
from the ring-buffer. A local attacker could use this to cause a
denial of service (infinite loop). (CVE-2017-9984, CVE-2017-9985)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 14.04 LTS:
linux-image-4.4.0-98-generic 4.4.0-98.121~14.04.1
linux-image-4.4.0-98-generic-lpae 4.4.0-98.121~14.04.1
linux-image-4.4.0-98-lowlatency 4.4.0-98.121~14.04.1
linux-image-4.4.0-98-powerpc-e500mc 4.4.0-98.121~14.04.1
linux-image-4.4.0-98-powerpc-smp 4.4.0-98.121~14.04.1
linux-image-4.4.0-98-powerpc64-emb 4.4.0-98.121~14.04.1
linux-image-4.4.0-98-powerpc64-smp 4.4.0-98.121~14.04.1
linux-image-generic-lpae-lts-xenial 4.4.0.98.82
linux-image-generic-lts-xenial 4.4.0.98.82
linux-image-lowlatency-lts-xenial 4.4.0.98.82
linux-image-powerpc-e500mc-lts-xenial 4.4.0.98.82
linux-image-powerpc-smp-lts-xenial 4.4.0.98.82
linux-image-powerpc64-emb-lts-xenial 4.4.0.98.82
linux-image-powerpc64-smp-lts-xenial 4.4.0.98.82
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.
References:
https://www.ubuntu.com/usn/usn-3469-2
https://www.ubuntu.com/usn/usn-3469-1
CVE-2017-10911, CVE-2017-12153, CVE-2017-12154, CVE-2017-12192,
CVE-2017-14051, CVE-2017-14156, CVE-2017-14340, CVE-2017-14489,
CVE-2017-14991, CVE-2017-15537, CVE-2017-9984, CVE-2017-9985
Package Information:
https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-98.121~14.04.1
- --------------------------END INCLUDED TEXT--------------------
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===========================================================================
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