The following updates has been released for Ubuntu Linux:

LSN-0030-1: Linux kernel vulnerability
USN-3346-2: Bind regression
USN-3419-1: Linux kernel vulnerabilities
USN-3419-2: Linux kernel (HWE) vulnerabilities
USN-3420-1: Linux kernel vulnerabilities
USN-3420-2: Linux kernel (Xenial HWE) vulnerabilities
USN-3421-1: Libidn2 vulnerability
USN-3422-1: Linux kernel vulnerabilities
USN-3422-2: Linux kernel (Trusty HWE) vulnerabilities
USN-3423-1: Linux kernel vulnerability
USN-3424-1: libxml2 vulnerabilities

LSN-0030-1: Linux kernel vulnerability

==========================================================================
September 18, 2017

linux vulnerability
==========================================================================

A security issue affects these releases of Ubuntu:

| Series | Base kernel | Arch | flavors |
|------------------+--------------+----------+------------------|
| Ubuntu 16.04 LTS | 4.4.0 | amd64 | generic |
| Ubuntu 16.04 LTS | 4.4.0 | amd64 | lowlatency |
| Ubuntu 14.04 LTS | 4.4.0 | amd64 | generic |
| Ubuntu 14.04 LTS | 4.4.0 | amd64 | lowlatency |

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux: Linux kernel

Details:

The Linux Kernel running on AMD64 systems will sometimes map the contents
of PIE executable, the heap or ld.so to where the stack is mapped allowing
attackers to more easily manipulate the stack. (CVE-2017-1000379)

It was discovered that a buffer overflow existed in the Bluetooth stack of
the Linux kernel when handling L2CAP cpnfiguration responses. A physically
proximate attacker could use this to cause a denial of service (system
crash). (CVE-2017-1000251)

It was discovered that the Flash-Friendly File System (f2fs) implementation
in the Linux kernel did not properly validate superblock metadata. A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2017-10663)

Update instructions:

The problem can be corrected by updating your livepatches to the following
versions:

| Kernel | Version | flavors |
|-----------------+----------+--------------------------|
| 4.4.0-21.37 | 30.3 | generic, lowlatency |
| 4.4.0-22.39 | 30.3 | generic, lowlatency |
| 4.4.0-22.40 | 30.3 | generic, lowlatency |
| 4.4.0-24.43 | 30.3 | generic, lowlatency |
| 4.4.0-28.47 | 30.3 | generic, lowlatency |
| 4.4.0-31.50 | 30.3 | generic, lowlatency |
| 4.4.0-34.53 | 30.3 | generic, lowlatency |
| 4.4.0-36.55 | 30.3 | generic, lowlatency |
| 4.4.0-38.57 | 30.3 | generic, lowlatency |
| 4.4.0-42.62 | 30.3 | generic, lowlatency |
| 4.4.0-43.63 | 30.3 | generic, lowlatency |
| 4.4.0-45.66 | 30.3 | generic, lowlatency |
| 4.4.0-47.68 | 30.3 | generic, lowlatency |
| 4.4.0-51.72 | 30.3 | generic, lowlatency |
| 4.4.0-53.74 | 30.3 | generic, lowlatency |
| 4.4.0-57.78 | 30.3 | generic, lowlatency |
| 4.4.0-59.80 | 30.3 | generic, lowlatency |
| 4.4.0-62.83 | 30.3 | generic, lowlatency |
| 4.4.0-63.84 | 30.3 | generic, lowlatency |
| 4.4.0-64.85 | 30.3 | generic, lowlatency |
| 4.4.0-66.87 | 30.3 | generic, lowlatency |
| 4.4.0-67.88 | 30.3 | generic, lowlatency |
| 4.4.0-70.91 | 30.3 | generic, lowlatency |
| 4.4.0-71.92 | 30.3 | generic, lowlatency |
| 4.4.0-72.93 | 30.3 | generic, lowlatency |
| 4.4.0-75.96 | 30.3 | generic, lowlatency |
| 4.4.0-77.98 | 30.3 | generic, lowlatency |
| 4.4.0-78.99 | 30.3 | generic, lowlatency |
| 4.4.0-79.100 | 30.3 | generic, lowlatency |
| 4.4.0-81.104 | 30.3 | generic, lowlatency |
| 4.4.0-83.106 | 30.3 | generic, lowlatency |
| 4.4.0-87.110 | 30.3 | generic, lowlatency |
| 4.4.0-89.112 | 30.3 | generic, lowlatency |
| 4.4.0-91.114 | 30.3 | generic, lowlatency |
| 4.4.0-92.115 | 30.3 | generic, lowlatency |
| 4.4.0-93.116 | 30.3 | generic, lowlatency |
| lts-4.4.0-21.37_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-22.39_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-22.40_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-24.43_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-28.47_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-31.50_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-34.53_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-36.55_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-38.57_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-42.62_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-45.66_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-47.68_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-51.72_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-53.74_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-57.78_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-59.80_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-62.83_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-63.84_14.04.2-lts-xenial | 14.04.2 | generic, lowlatency |
| lts-4.4.0-64.85_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-66.87_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-70.91_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-71.92_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-72.93_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-75.96_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-78.99_14.04.2-lts-xenial | 14.04.2 | generic, lowlatency |
| lts-4.4.0-79.100_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-81.104_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-87.110_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-89.112_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-91.114_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-92.115_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |

Additionally, you should install an updated kernel with these fixes and
reboot at your convienience.

References:
CVE-2017-1000251, CVE-2017-1000379, CVE-2017-10663

USN-3346-2: Bind regression

==========================================================================
Ubuntu Security Notice USN-3346-2
September 18, 2017

bind9 regression
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 17.04
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

USN-3346-1 introduced a regression in Bind.

Software Description:
- bind9: Internet Domain Name Server

Details:

USN-3346-1 fixed vulnerabilities in Bind. The fix for CVE-2017-3142
introduced a regression in the ability to receive an AXFR or IXFR in the
case where TSIG is used and not every message is signed. This update fixes
the problem.

In addition, this update adds the new root zone key signing key (KSK).

Original advisory details:

ClÃment Berthaux discovered that Bind did not correctly check TSIG
authentication for zone update requests. An attacker could use this
to improperly perform zone updates. (CVE-2017-3143)
ClÃment Berthaux discovered that Bind did not correctly check TSIG
authentication for zone transfer requests. An attacker could use this
to improperly transfer entire zones. (CVE-2017-3142)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 17.04:
bind9 1:9.10.3.dfsg.P4-10.1ubuntu5.2

Ubuntu 16.04 LTS:
bind9 1:9.10.3.dfsg.P4-8ubuntu1.8

Ubuntu 14.04 LTS:
bind9 1:9.9.5.dfsg-3ubuntu0.16

After a standard system update you need to restart Bind to make
all the necessary changes.

References:
https://www.ubuntu.com/usn/usn-3346-2
https://www.ubuntu.com/usn/usn-3346-1
https://launchpad.net/bugs/1717981

Package Information:
https://launchpad.net/ubuntu/+source/bind9/1:9.10.3.dfsg.P4-10.1ubuntu5.2
https://launchpad.net/ubuntu/+source/bind9/1:9.10.3.dfsg.P4-8ubuntu1.8
https://launchpad.net/ubuntu/+source/bind9/1:9.9.5.dfsg-3ubuntu0.16

USN-3419-1: Linux kernel vulnerabilities

=========================================================================
Ubuntu Security Notice USN-3419-1
September 18, 2017

linux, linux-raspi2 vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 17.04

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel
- linux-raspi2: Linux kernel for Raspberry Pi 2

Details:

It was discovered that a buffer overflow existed in the Bluetooth stack of
the Linux kernel when handling L2CAP configuration responses. A physically
proximate attacker could use this to cause a denial of service (system
crash). (CVE-2017-1000251)

It was discovered that a buffer overflow existed in the Broadcom FullMAC
WLAN driver in the Linux kernel. A local attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2017-7541)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 17.04:
linux-image-4.10.0-1018-raspi2 4.10.0-1018.21
linux-image-4.10.0-35-generic 4.10.0-35.39
linux-image-4.10.0-35-generic-lpae 4.10.0-35.39
linux-image-4.10.0-35-lowlatency 4.10.0-35.39
linux-image-generic 4.10.0.35.35
linux-image-generic-lpae 4.10.0.35.35
linux-image-lowlatency 4.10.0.35.35
linux-image-raspi2 4.10.0.1018.19

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-3419-1
CVE-2017-1000251, CVE-2017-7541

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.10.0-35.39
https://launchpad.net/ubuntu/+source/linux-raspi2/4.10.0-1018.21

USN-3419-2: Linux kernel (HWE) vulnerabilities

=========================================================================
Ubuntu Security Notice USN-3419-2
September 18, 2017

linux-hwe 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-hwe: Linux hardware enablement (HWE) kernel

Details:

USN-3419-1 fixed vulnerabilities in the Linux kernel for Ubuntu 17.04.
This update provides the corresponding updates for the Linux Hardware
Enablement (HWE) kernel from Ubuntu 17.04 for Ubuntu 16.04 LTS.

It was discovered that a buffer overflow existed in the Bluetooth stack of
the Linux kernel when handling L2CAP configuration responses. A physically
proximate attacker could use this to cause a denial of service (system
crash). (CVE-2017-1000251)

It was discovered that a buffer overflow existed in the Broadcom FullMAC
WLAN driver in the Linux kernel. A local attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2017-7541)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.04 LTS:
linux-image-4.10.0-35-generic 4.10.0-35.39~16.04.1
linux-image-4.10.0-35-generic-lpae 4.10.0-35.39~16.04.1
linux-image-4.10.0-35-lowlatency 4.10.0-35.39~16.04.1
linux-image-generic-hwe-16.04 4.10.0.35.37
linux-image-generic-lpae-hwe-16.04 4.10.0.35.37
linux-image-lowlatency-hwe-16.04 4.10.0.35.37

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-3419-2
https://www.ubuntu.com/usn/usn-3419-1
CVE-2017-1000251, CVE-2017-7541

Package Information:
https://launchpad.net/ubuntu/+source/linux-hwe/4.10.0-35.39~16.04.1

USN-3420-1: Linux kernel vulnerabilities

=========================================================================
Ubuntu Security Notice USN-3420-1
September 18, 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:

It was discovered that a buffer overflow existed in the Bluetooth stack of
the Linux kernel when handling L2CAP configuration responses. A physically
proximate attacker could use this to cause a denial of service (system
crash). (CVE-2017-1000251)

It was discovered that the Flash-Friendly File System (f2fs) implementation
in the Linux kernel did not properly validate superblock metadata. A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2017-10663)

It was discovered that a buffer overflow existed in the ioctl handling code
in the ISDN subsystem of the Linux kernel. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2017-12762)

Pengfei Wang discovered that a race condition existed in the NXP SAA7164 TV
Decoder driver for the Linux kernel. A local attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2017-8831)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.04 LTS:
linux-image-4.4.0-1007-kvm 4.4.0-1007.12
linux-image-4.4.0-1031-gke 4.4.0-1031.31
linux-image-4.4.0-1035-aws 4.4.0-1035.44
linux-image-4.4.0-1074-raspi2 4.4.0-1074.82
linux-image-4.4.0-1076-snapdragon 4.4.0-1076.81
linux-image-4.4.0-96-generic 4.4.0-96.119
linux-image-4.4.0-96-generic-lpae 4.4.0-96.119
linux-image-4.4.0-96-lowlatency 4.4.0-96.119
linux-image-4.4.0-96-powerpc-e500mc 4.4.0-96.119
linux-image-4.4.0-96-powerpc-smp 4.4.0-96.119
linux-image-4.4.0-96-powerpc64-emb 4.4.0-96.119
linux-image-4.4.0-96-powerpc64-smp 4.4.0-96.119
linux-image-aws 4.4.0.1035.37
linux-image-generic 4.4.0.96.101
linux-image-generic-lpae 4.4.0.96.101
linux-image-gke 4.4.0.1031.32
linux-image-kvm 4.4.0.1007.7
linux-image-lowlatency 4.4.0.96.101
linux-image-powerpc-e500mc 4.4.0.96.101
linux-image-powerpc-smp 4.4.0.96.101
linux-image-powerpc64-emb 4.4.0.96.101
linux-image-powerpc64-smp 4.4.0.96.101
linux-image-raspi2 4.4.0.1074.74
linux-image-snapdragon 4.4.0.1076.68

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-3420-1
CVE-2017-1000251, CVE-2017-10663, CVE-2017-12762, CVE-2017-8831

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.4.0-96.119
https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1035.44
https://launchpad.net/ubuntu/+source/linux-gke/4.4.0-1031.31
https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1007.12
https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1074.82
https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1076.81

USN-3420-2: Linux kernel (Xenial HWE) vulnerabilities

=========================================================================
Ubuntu Security Notice USN-3420-2
September 18, 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-3420-1 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.

It was discovered that a buffer overflow existed in the Bluetooth stack of
the Linux kernel when handling L2CAP configuration responses. A physically
proximate attacker could use this to cause a denial of service (system
crash). (CVE-2017-1000251)

It was discovered that the Flash-Friendly File System (f2fs) implementation
in the Linux kernel did not properly validate superblock metadata. A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2017-10663)

It was discovered that a buffer overflow existed in the ioctl handling code
in the ISDN subsystem of the Linux kernel. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2017-12762)

Pengfei Wang discovered that a race condition existed in the NXP SAA7164 TV
Decoder driver for the Linux kernel. A local attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2017-8831)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 14.04 LTS:
linux-image-4.4.0-96-generic 4.4.0-96.119~14.04.1
linux-image-4.4.0-96-generic-lpae 4.4.0-96.119~14.04.1
linux-image-4.4.0-96-lowlatency 4.4.0-96.119~14.04.1
linux-image-4.4.0-96-powerpc-e500mc 4.4.0-96.119~14.04.1
linux-image-4.4.0-96-powerpc-smp 4.4.0-96.119~14.04.1
linux-image-4.4.0-96-powerpc64-emb 4.4.0-96.119~14.04.1
linux-image-4.4.0-96-powerpc64-smp 4.4.0-96.119~14.04.1
linux-image-generic-lpae-lts-xenial 4.4.0.96.80
linux-image-generic-lts-xenial 4.4.0.96.80
linux-image-lowlatency-lts-xenial 4.4.0.96.80
linux-image-powerpc-e500mc-lts-xenial 4.4.0.96.80
linux-image-powerpc-smp-lts-xenial 4.4.0.96.80
linux-image-powerpc64-emb-lts-xenial 4.4.0.96.80
linux-image-powerpc64-smp-lts-xenial 4.4.0.96.80

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-3420-2
https://www.ubuntu.com/usn/usn-3420-1
CVE-2017-1000251, CVE-2017-10663, CVE-2017-12762, CVE-2017-8831

Package Information:
https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-96.119~14.04.1

USN-3421-1: Libidn2 vulnerability

==========================================================================
Ubuntu Security Notice USN-3421-1
September 18, 2017

libidn2-0 vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 17.04

Summary:

Libidn2 could be made to crash if it received specially crafted
input.

Software Description:
- libidn2-0: Internationalized domain names (IDNA2008) library

Details:

It was discovered that Libidn2 incorrectly handled certain input. A
remote attacker could possibly use this issue to cause Libidn2 to
crash, resulting in a denial of service.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 17.04:
  idn2 0.16-1ubuntu0.1
  libidn2-0 0.16-1ubuntu0.1

In general, a standard system update will make all the necessary
changes.

References:
  https://www.ubuntu.com/usn/usn-3421-1
  CVE-2017-14062

Package Information:
  https://launchpad.net/ubuntu/+source/libidn2-0/0.16-1ubuntu0.1

USN-3422-1: Linux kernel vulnerabilities

=========================================================================
Ubuntu Security Notice USN-3422-1
September 18, 2017

linux 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: Linux kernel

Details:

It was discovered that a buffer overflow existed in the Bluetooth stack of
the Linux kernel when handling L2CAP configuration responses. A physically
proximate attacker could use this to cause a denial of service (system
crash). (CVE-2017-1000251)

It was discovered that the asynchronous I/O (aio) subsystem of the Linux
kernel did not properly set permissions on aio memory mappings in some
situations. An attacker could use this to more easily exploit other
vulnerabilities. (CVE-2016-10044)

Baozeng Ding and Andrey Konovalov discovered a race condition in the L2TPv3
IP Encapsulation implementation in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2016-10200)

Andreas Gruenbacher and Jan Kara discovered that the filesystem
implementation in the Linux kernel did not clear the setgid bit during a
setxattr call. A local attacker could use this to possibly elevate group
privileges. (CVE-2016-7097)

Sergej Schumilo, Ralf Spenneberg, and Hendrik Schwartke discovered that the
key management subsystem in the Linux kernel did not properly allocate
memory in some situations. A local attacker could use this to cause a
denial of service (system crash). (CVE-2016-8650)

Vlad Tsyrklevich discovered an integer overflow vulnerability in the VFIO
PCI driver for the Linux kernel. A local attacker with access to a vfio PCI
device file could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2016-9083, CVE-2016-9084)

It was discovered that an information leak existed in __get_user_asm_ex()
in the Linux kernel. A local attacker could use this to expose sensitive
information. (CVE-2016-9178)

CAI Qian discovered that the sysctl implementation in the Linux kernel did
not properly perform reference counting in some situations. An unprivileged
attacker could use this to cause a denial of service (system hang).
(CVE-2016-9191)

It was discovered that the keyring implementation in the Linux kernel in
some situations did not prevent special internal keyrings from being joined
by userspace keyrings. A privileged local attacker could use this to bypass
module verification. (CVE-2016-9604)

It was discovered that an integer overflow existed in the trace subsystem
of the Linux kernel. A local privileged attacker could use this to cause a
denial of service (system crash). (CVE-2016-9754)

Andrey Konovalov discovered that the IPv4 implementation in the Linux
kernel did not properly handle invalid IP options in some situations. An
attacker could use this to cause a denial of service or possibly execute
arbitrary code. (CVE-2017-5970)

Dmitry Vyukov discovered that the Linux kernel did not properly handle TCP
packets with the URG flag. A remote attacker could use this to cause a
denial of service. (CVE-2017-6214)

It was discovered that a race condition existed in the AF_PACKET handling
code in the Linux kernel. A local attacker could use this to cause a denial
of service (system crash) or possibly execute arbitrary code.
(CVE-2017-6346)

It was discovered that the keyring implementation in the Linux kernel did
not properly restrict searches for dead keys. A local attacker could use
this to cause a denial of service (system crash). (CVE-2017-6951)

Dmitry Vyukov discovered that the generic SCSI (sg) subsystem in the Linux
kernel contained a stack-based buffer overflow. A local attacker with
access to an sg device could use this to cause a denial of service (system
crash) or possibly execute arbitrary code. (CVE-2017-7187)

Eric Biggers discovered a memory leak in the keyring implementation in the
Linux kernel. A local attacker could use this to cause a denial of service
(memory consumption). (CVE-2017-7472)

It was discovered that a buffer overflow existed in the Broadcom FullMAC
WLAN driver in the Linux kernel. A local attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2017-7541)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 14.04 LTS:
linux-image-3.13.0-132-generic 3.13.0-132.181
linux-image-3.13.0-132-generic-lpae 3.13.0-132.181
linux-image-3.13.0-132-lowlatency 3.13.0-132.181
linux-image-3.13.0-132-powerpc-e500 3.13.0-132.181
linux-image-3.13.0-132-powerpc-e500mc 3.13.0-132.181
linux-image-3.13.0-132-powerpc-smp 3.13.0-132.181
linux-image-3.13.0-132-powerpc64-emb 3.13.0-132.181
linux-image-3.13.0-132-powerpc64-smp 3.13.0-132.181
linux-image-generic 3.13.0.132.141
linux-image-generic-lpae 3.13.0.132.141
linux-image-lowlatency 3.13.0.132.141
linux-image-powerpc-e500 3.13.0.132.141
linux-image-powerpc-e500mc 3.13.0.132.141
linux-image-powerpc-smp 3.13.0.132.141
linux-image-powerpc64-emb 3.13.0.132.141
linux-image-powerpc64-smp 3.13.0.132.141

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-3422-1
CVE-2016-10044, CVE-2016-10200, CVE-2016-7097, CVE-2016-8650,
CVE-2016-9083, CVE-2016-9084, CVE-2016-9178, CVE-2016-9191,
CVE-2016-9604, CVE-2016-9754, CVE-2017-1000251, CVE-2017-5970,
CVE-2017-6214, CVE-2017-6346, CVE-2017-6951, CVE-2017-7187,
CVE-2017-7472, CVE-2017-7541

Package Information:
https://launchpad.net/ubuntu/+source/linux/3.13.0-132.181

USN-3422-2: Linux kernel (Trusty HWE) vulnerabilities

=========================================================================
Ubuntu Security Notice USN-3422-2
September 18, 2017

linux-lts-trusty vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise ESM

Details:

USN-3422-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu
12.04 LTS.

It was discovered that a buffer overflow existed in the Bluetooth stack of
the Linux kernel when handling L2CAP configuration responses. A physically
proximate attacker could use this to cause a denial of service (system
crash). (CVE-2017-1000251)

It was discovered that the asynchronous I/O (aio) subsystem of the Linux
kernel did not properly set permissions on aio memory mappings in some
situations. An attacker could use this to more easily exploit other
vulnerabilities. (CVE-2016-10044)

Baozeng Ding and Andrey Konovalov discovered a race condition in the L2TPv3
IP Encapsulation implementation in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2016-10200)

Andreas Gruenbacher and Jan Kara discovered that the filesystem
implementation in the Linux kernel did not clear the setgid bit during a
setxattr call. A local attacker could use this to possibly elevate group
privileges. (CVE-2016-7097)

Sergej Schumilo, Ralf Spenneberg, and Hendrik Schwartke discovered that the
key management subsystem in the Linux kernel did not properly allocate
memory in some situations. A local attacker could use this to cause a
denial of service (system crash). (CVE-2016-8650)

Vlad Tsyrklevich discovered an integer overflow vulnerability in the VFIO
PCI driver for the Linux kernel. A local attacker with access to a vfio PCI
device file could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2016-9083, CVE-2016-9084)

It was discovered that an information leak existed in __get_user_asm_ex()
in the Linux kernel. A local attacker could use this to expose sensitive
information. (CVE-2016-9178)

CAI Qian discovered that the sysctl implementation in the Linux kernel did
not properly perform reference counting in some situations. An unprivileged
attacker could use this to cause a denial of service (system hang).
(CVE-2016-9191)

It was discovered that the keyring implementation in the Linux kernel in
some situations did not prevent special internal keyrings from being joined
by userspace keyrings. A privileged local attacker could use this to bypass
module verification. (CVE-2016-9604)

It was discovered that an integer overflow existed in the trace subsystem
of the Linux kernel. A local privileged attacker could use this to cause a
denial of service (system crash). (CVE-2016-9754)

Andrey Konovalov discovered that the IPv4 implementation in the Linux
kernel did not properly handle invalid IP options in some situations. An
attacker could use this to cause a denial of service or possibly execute
arbitrary code. (CVE-2017-5970)

Dmitry Vyukov discovered that the Linux kernel did not properly handle TCP
packets with the URG flag. A remote attacker could use this to cause a
denial of service. (CVE-2017-6214)

It was discovered that a race condition existed in the AF_PACKET handling
code in the Linux kernel. A local attacker could use this to cause a denial
of service (system crash) or possibly execute arbitrary code.
(CVE-2017-6346)

It was discovered that the keyring implementation in the Linux kernel did
not properly restrict searches for dead keys. A local attacker could use
this to cause a denial of service (system crash). (CVE-2017-6951)

Dmitry Vyukov discovered that the generic SCSI (sg) subsystem in the Linux
kernel contained a stack-based buffer overflow. A local attacker with
access to an sg device could use this to cause a denial of service (system
crash) or possibly execute arbitrary code. (CVE-2017-7187)

Eric Biggers discovered a memory leak in the keyring implementation in the
Linux kernel. A local attacker could use this to cause a denial of service
(memory consumption). (CVE-2017-7472)

It was discovered that a buffer overflow existed in the Broadcom FullMAC
WLAN driver in the Linux kernel. A local attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2017-7541)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.04 ESM:
linux-image-3.13.0-132-generic 3.13.0-132.181~precise1
linux-image-3.13.0-132-generic-lpae 3.13.0-132.181~precise1
linux-image-generic-lpae-lts-trusty 3.13.0.132.122
linux-image-generic-lts-trusty 3.13.0.132.122

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-3422-2
https://www.ubuntu.com/usn/usn-3422-1
CVE-2016-10044, CVE-2016-10200, CVE-2016-7097, CVE-2016-8650,
CVE-2016-9083, CVE-2016-9084, CVE-2016-9178, CVE-2016-9191,
CVE-2016-9604, CVE-2016-9754, CVE-2017-1000251, CVE-2017-5970,
CVE-2017-6214, CVE-2017-6346, CVE-2017-6951, CVE-2017-7187,
CVE-2017-7472, CVE-2017-7541

USN-3423-1: Linux kernel vulnerability

=========================================================================
Ubuntu Security Notice USN-3423-1
September 18, 2017

linux vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 ESM

Summary:

The system could be made to crash if it received specially crafted
bluetooth traffic.

Software Description:
- linux: Linux kernel

Details:

It was discovered that a buffer overflow existed in the Bluetooth stack of
the Linux kernel when handling L2CAP configuration responses. A physically
proximate attacker could use this to cause a denial of service (system
crash).

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.04 ESM:
linux-image-3.2.0-131-generic 3.2.0-131.177
linux-image-3.2.0-131-generic-pae 3.2.0-131.177
linux-image-3.2.0-131-highbank 3.2.0-131.177
linux-image-3.2.0-131-omap 3.2.0-131.177
linux-image-3.2.0-131-powerpc-smp 3.2.0-131.177
linux-image-3.2.0-131-powerpc64-smp 3.2.0-131.177
linux-image-3.2.0-131-virtual 3.2.0-131.177
linux-image-generic 3.2.0.131.145
linux-image-generic-pae 3.2.0.131.145
linux-image-highbank 3.2.0.131.145
linux-image-omap 3.2.0.131.145
linux-image-powerpc-smp 3.2.0.131.145
linux-image-powerpc64-smp 3.2.0.131.145
linux-image-virtual 3.2.0.131.145

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-3423-1
CVE-2017-1000251

USN-3424-1: libxml2 vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3424-1
September 19, 2017

libxml2 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 17.04
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in libxml2.

Software Description:
- libxml2: GNOME XML library

Details:

It was discovered that a type confusion error existed in libxml2. An
attacker could use this to specially construct XML data that
could cause a denial of service or possibly execute arbitrary
code. (CVE-2017-0663)

It was discovered that libxml2 did not properly validate parsed entity
references. An attacker could use this to specially construct XML
data that could expose sensitive information. (CVE-2017-7375)

It was discovered that a buffer overflow existed in libxml2 when
handling HTTP redirects. An attacker could use this to specially
construct XML data that could cause a denial of service or possibly
execute arbitrary code. (CVE-2017-7376)

Marcel Böhme and Van-Thuan Pham discovered a buffer overflow in
libxml2 when handling elements. An attacker could use this to specially
construct XML data that could cause a denial of service or possibly
execute arbitrary code. (CVE-2017-9047)

Marcel Böhme and Van-Thuan Pham discovered a buffer overread
in libxml2 when handling elements. An attacker could use this
to specially construct XML data that could cause a denial of
service. (CVE-2017-9048)

Marcel Böhme and Van-Thuan Pham discovered multiple buffer overreads
in libxml2 when handling parameter-entity references. An attacker
could use these to specially construct XML data that could cause a
denial of service. (CVE-2017-9049, CVE-2017-9050)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 17.04:
libxml2 2.9.4+dfsg1-2.2ubuntu0.1

Ubuntu 16.04 LTS:
libxml2 2.9.3+dfsg1-1ubuntu0.3

Ubuntu 14.04 LTS:
libxml2 2.9.1+dfsg1-3ubuntu4.10

In general, a standard system update will make all the necessary changes.

References:
https://www.ubuntu.com/usn/usn-3424-1
CVE-2017-0663, CVE-2017-7375, CVE-2017-7376, CVE-2017-9047,
CVE-2017-9048, CVE-2017-9049, CVE-2017-9050

Package Information:
https://launchpad.net/ubuntu/+source/libxml2/2.9.4+dfsg1-2.2ubuntu0.1
https://launchpad.net/ubuntu/+source/libxml2/2.9.3+dfsg1-1ubuntu0.3
https://launchpad.net/ubuntu/+source/libxml2/2.9.1+dfsg1-3ubuntu4.10