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==========================================================================
Ubuntu Security Notice USN-4162-2
October 23, 2019

linux-azure vulnerabilities
==========================================================================

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

– Ubuntu 14.04 ESM

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
– linux-azure: Linux kernel for Microsoft Azure Cloud systems

Details:

USN-4162-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04
LTS. This update provides the corresponding updates for the Linux
kernel for Microsoft Azure Cloud systems for Ubuntu 14.04 ESM.

It was discovered that the RSI 91x Wi-Fi driver in the Linux kernel did not
did not handle detach operations correctly, leading to a use-after-free
vulnerability. A physically proximate attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2018-21008)

Wen Huang discovered that the Marvell Wi-Fi device driver in the Linux
kernel did not properly perform bounds checking, leading to a heap
overflow. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2019-14814,
CVE-2019-14815, CVE-2019-14816)

Matt Delco discovered that the KVM hypervisor implementation in the Linux
kernel did not properly perform bounds checking when handling coalesced
MMIO write operations. A local attacker with write access to /dev/kvm could
use this to cause a denial of service (system crash). (CVE-2019-14821)

Hui Peng and Mathias Payer discovered that the USB audio driver for the
Linux kernel did not properly validate device meta data. A physically
proximate attacker could use this to cause a denial of service (system
crash). (CVE-2019-15117)

Hui Peng and Mathias Payer discovered that the USB audio driver for the
Linux kernel improperly performed recursion while handling device meta
data. A physically proximate attacker could use this to cause a denial of
service (system crash). (CVE-2019-15118)

It was discovered that the Technisat DVB-S/S2 USB device driver in the
Linux kernel contained a buffer overread. A physically proximate attacker
could use this to cause a denial of service (system crash) or possibly
expose sensitive information. (CVE-2019-15505)

Brad Spengler discovered that a Spectre mitigation was improperly
implemented in the ptrace susbsystem of the Linux kernel. A local attacker
could possibly use this to expose sensitive information. (CVE-2019-15902)

It was discovered that the SMB networking file system implementation in the
Linux kernel contained a buffer overread. An attacker could use this to
expose sensitive information (kernel memory). (CVE-2019-15918)

Update instructions:

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

Ubuntu 14.04 ESM:
linux-image-4.15.0-1061-azure 4.15.0-1061.66~14.04.1
linux-image-azure 4.15.0.1061.47

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://usn.ubuntu.com/4162-2
https://usn.ubuntu.com/4162-1
CVE-2018-21008, CVE-2019-14814, CVE-2019-14815, CVE-2019-14816,
CVE-2019-14821, CVE-2019-15117, CVE-2019-15118, CVE-2019-15505,
CVE-2019-15902, CVE-2019-15918

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==========================================================================
Kernel Live Patch Security Notice 0058-1
October 22, 2019

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

A security issue affects these releases of Ubuntu:

| Series | Base kernel | Arch | flavors |
|——————+————–+———-+——————|
| Ubuntu 18.04 LTS | 4.15.0 | amd64 | aws |
| Ubuntu 18.04 LTS | 4.15.0 | amd64 | generic |
| Ubuntu 18.04 LTS | 4.15.0 | amd64 | lowlatency |
| Ubuntu 18.04 LTS | 4.15.0 | amd64 | oem |
| Ubuntu 18.04 LTS | 5.0.0 | amd64 | azure |
| Ubuntu 14.04 LTS | 4.4.0 | amd64 | generic |
| Ubuntu 14.04 LTS | 4.4.0 | amd64 | lowlatency |
| Ubuntu 16.04 LTS | 4.4.0 | amd64 | aws |
| Ubuntu 16.04 LTS | 4.4.0 | amd64 | generic |
| Ubuntu 16.04 LTS | 4.4.0 | amd64 | lowlatency |
| Ubuntu 16.04 LTS | 4.15.0 | amd64 | azure |
| Ubuntu 16.04 LTS | 4.15.0 | amd64 | generic |
| Ubuntu 16.04 LTS | 4.15.0 | amd64 | lowlatency |

Summary:

Several security issues were fixed in the kernel.

Software Description:
– linux: Linux kernel

Details:

It was discovered that a race condition existed in the GFS2 file system in
the Linux kernel. A local attacker could possibly use this to cause a
denial of service (system crash). (CVE-2016-10905)

It was discovered that a use-after-free error existed in the block layer
subsystem of the Linux kernel when certain failure conditions occurred. A
local attacker could possibly use this to cause a denial of service (system
crash) or possibly execute arbitrary code. (CVE-2018-20856)

It was discovered that the USB gadget Midi driver in the Linux kernel
contained a double-free vulnerability when handling certain error
conditions. A local attacker could use this to cause a denial of service
(system crash). (CVE-2018-20961)

It was discovered that the XFS file system in the Linux kernel did not
properly handle mount failures in some situations. A local attacker could
possibly use this to cause a denial of service (system crash) or execute
arbitrary code. (CVE-2018-20976)

It was discovered that the Intel Wi-Fi device driver in the Linux kernel
did not properly validate certain Tunneled Direct Link Setup (TDLS). A
physically proximate attacker could use this to cause a denial of service
(Wi-Fi disconnect). (CVE-2019-0136)

It was discovered that the Linux kernel on ARM processors allowed a tracing
process to modify a syscall after a seccomp decision had been made on that
syscall. A local attacker could possibly use this to bypass seccomp
restrictions. (CVE-2019-2054)

It was discovered that an integer overflow existed in the Binder
implementation of the Linux kernel, leading to a buffer overflow. A local
attacker could use this to escalate privileges. (CVE-2019-2181)

It was discovered that the Marvell Wireless LAN device driver in the Linux
kernel did not properly validate the BSS descriptor. A local attacker could
possibly use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2019-3846)

It was discovered that a heap buffer overflow existed in the Marvell
Wireless LAN device driver for the Linux kernel. An attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2019-10126)

It was discovered that the Bluetooth UART implementation in the Linux
kernel did not properly check for missing tty operations. A local attacker
could use this to cause a denial of service. (CVE-2019-10207)

Jonathan Looney discovered that an integer overflow existed in the Linux
kernel when handling TCP Selective Acknowledgments (SACKs). A remote
attacker could use this to cause a denial of service (system crash).
(CVE-2019-11477)

Jonathan Looney discovered that the TCP retransmission queue implementation
in the Linux kernel could be fragmented when handling certain TCP Selective
Acknowledgment (SACK) sequences. A remote attacker could use this to cause
a denial of service. (CVE-2019-11478)

It was discovered that the ext4 file system implementation in the Linux
kernel did not properly zero out memory in some situations. A local
attacker could use this to expose sensitive information (kernel memory).
(CVE-2019-11833)

It was discovered that the PowerPC dlpar implementation in the Linux kernel
did not properly check for allocation errors in some situations. A local
attacker could possibly use this to cause a denial of service (system
crash). (CVE-2019-12614)

It was discovered that the floppy driver in the Linux kernel did not
properly validate meta data, leading to a buffer overread. A local attacker
could use this to cause a denial of service (system crash).
(CVE-2019-14283)

It was discovered that the floppy driver in the Linux kernel did not
properly validate ioctl() calls, leading to a division-by-zero. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2019-14284)

Peter Pi discovered a buffer overflow in the virtio network backend
(vhost_net) implementation in the Linux kernel. An attacker in a guest may
be able to use this to cause a denial of service (host OS crash) or
possibly execute arbitrary code in the host OS. (CVE-2019-14835)

Update instructions:

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

| Kernel | Version | flavors |
|————————–+———-+————————–|
| 4.4.0-148.174 | 58.1 | lowlatency, generic |
| 4.4.0-148.174~14.04.1 | 58.1 | lowlatency, generic |
| 4.4.0-150.176 | 58.1 | generic, lowlatency |
| 4.4.0-150.176~14.04.1 | 58.1 | lowlatency, generic |
| 4.4.0-151.178 | 58.1 | lowlatency, generic |
| 4.4.0-151.178~14.04.1 | 58.1 | generic, lowlatency |
| 4.4.0-154.181 | 58.1 | lowlatency, generic |
| 4.4.0-154.181~14.04.1 | 58.1 | generic, lowlatency |
| 4.4.0-157.185 | 58.1 | lowlatency, generic |
| 4.4.0-157.185~14.04.1 | 58.1 | generic, lowlatency |
| 4.4.0-159.187 | 58.1 | lowlatency, generic |
| 4.4.0-159.187~14.04.1 | 58.1 | generic, lowlatency |
| 4.4.0-161.189 | 58.1 | lowlatency, generic |
| 4.4.0-161.189~14.04.1 | 58.1 | lowlatency, generic |
| 4.4.0-164.192 | 58.1 | lowlatency, generic |
| 4.4.0-164.192~14.04.1 | 58.1 | lowlatency, generic |
| 4.4.0-165.193 | 58.1 | generic, lowlatency |
| 4.4.0-1083.93 | 58.1 | aws |
| 4.4.0-1084.94 | 58.1 | aws |
| 4.4.0-1085.96 | 58.1 | aws |
| 4.4.0-1087.98 | 58.1 | aws |
| 4.4.0-1088.99 | 58.1 | aws |
| 4.4.0-1090.101 | 58.1 | aws |
| 4.4.0-1092.103 | 58.1 | aws |
| 4.4.0-1094.105 | 58.1 | aws |
| 4.15.0-50.54 | 58.1 | generic, lowlatency |
| 4.15.0-50.54~16.04.1 | 58.1 | generic, lowlatency |
| 4.15.0-51.55 | 58.1 | generic, lowlatency |
| 4.15.0-51.55~16.04.1 | 58.1 | generic, lowlatency |
| 4.15.0-52.56 | 58.1 | lowlatency, generic |
| 4.15.0-52.56~16.04.1 | 58.1 | generic, lowlatency |
| 4.15.0-54.58 | 58.1 | generic, lowlatency |
| 4.15.0-54.58~16.04.1 | 58.1 | generic, lowlatency |
| 4.15.0-55.60 | 58.1 | generic, lowlatency |
| 4.15.0-58.64 | 58.1 | generic, lowlatency |
| 4.15.0-58.64~16.04.1 | 58.1 | lowlatency, generic |
| 4.15.0-60.67 | 58.1 | lowlatency, generic |
| 4.15.0-60.67~16.04.1 | 58.1 | generic, lowlatency |
| 4.15.0-62.69 | 58.1 | generic, lowlatency |
| 4.15.0-62.69~16.04.1 | 58.1 | lowlatency, generic |
| 4.15.0-64.73 | 58.1 | generic, lowlatency |
| 4.15.0-64.73~16.04.1 | 58.1 | lowlatency, generic |
| 4.15.0-65.74 | 58.1 | lowlatency, generic |
| 4.15.0-1038.43 | 58.1 | oem |
| 4.15.0-1039.41 | 58.1 | aws |
| 4.15.0-1039.44 | 58.1 | oem |
| 4.15.0-1040.42 | 58.1 | aws |
| 4.15.0-1041.43 | 58.1 | aws |
| 4.15.0-1043.45 | 58.1 | aws |
| 4.15.0-1043.48 | 58.1 | oem |
| 4.15.0-1044.46 | 58.1 | aws |
| 4.15.0-1045.47 | 58.1 | aws |
| 4.15.0-1045.50 | 58.1 | oem |
| 4.15.0-1047.49 | 58.1 | aws |
| 4.15.0-1047.51 | 58.1 | azure |
| 4.15.0-1048.50 | 58.1 | aws |
| 4.15.0-1049.54 | 58.1 | azure |
| 4.15.0-1050.52 | 58.1 | aws |
| 4.15.0-1050.55 | 58.1 | azure |
| 4.15.0-1050.57 | 58.1 | oem |
| 4.15.0-1051.53 | 58.1 | aws |
| 4.15.0-1051.56 | 58.1 | azure |
| 4.15.0-1052.57 | 58.1 | azure |
| 4.15.0-1055.60 | 58.1 | azure |
| 4.15.0-1056.61 | 58.1 | azure |
| 4.15.0-1056.65 | 58.1 | oem |
| 4.15.0-1057.62 | 58.1 | azure |
| 4.15.0-1057.66 | 58.1 | oem |
| 4.15.0-1059.64 | 58.1 | azure |
| 5.0.0-1014.14~18.04.1 | 58.1 | azure |
| 5.0.0-1016.17~18.04.1 | 58.1 | azure |
| 5.0.0-1018.19~18.04.1 | 58.1 | azure |
| 5.0.0-1020.21~18.04.1 | 58.1 | azure |

Support Information:

Kernels older than the levels listed below do not receive livepatch
updates. Please upgrade your kernel as soon as possible.

| Series | Version | Flavors |
|——————+——————+————————–|
| Ubuntu 18.04 LTS | 4.15.0-1039 | aws |
| Ubuntu 16.04 LTS | 4.4.0-1083 | aws |
| Ubuntu 18.04 LTS | 5.0.0-1000 | azure |
| Ubuntu 16.04 LTS | 4.15.0-1047 | azure |
| Ubuntu 18.04 LTS | 4.15.0-50 | generic lowlatency |
| Ubuntu 16.04 LTS | 4.15.0-50 | generic lowlatency |
| Ubuntu 14.04 LTS | 4.4.0-148 | generic lowlatency |
| Ubuntu 18.04 LTS | 4.15.0-1038 | oem |
| Ubuntu 16.04 LTS | 4.4.0-148 | generic lowlatency |

References:
CVE-2016-10905, CVE-2018-20856, CVE-2018-20961, CVE-2018-20976,
CVE-2018-21008, CVE-2019-0136, CVE-2019-2054, CVE-2019-2181,
CVE-2019-3846, CVE-2019-10126, CVE-2019-10207, CVE-2019-11477,
CVE-2019-11478, CVE-2019-11833, CVE-2019-12614, CVE-2019-14283,
CVE-2019-14284, CVE-2019-14814, CVE-2019-14815, CVE-2019-14816,
CVE-2019-14821, CVE-2019-14835

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==========================================================================
Ubuntu Security Notice USN-4163-2
October 23, 2019

linux-lts-xenial, linux-aws vulnerabilities
==========================================================================

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

– Ubuntu 14.04 ESM

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
– linux-aws: Linux kernel for Amazon Web Services (AWS) systems
– linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

Details:

USN-4163-1 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 ESM.

It was discovered that a race condition existed in the ARC EMAC ethernet
driver for the Linux kernel, resulting in a use-after-free vulnerability.
An attacker could use this to cause a denial of service (system crash).
(CVE-2016-10906)

It was discovered that a race condition existed in the Serial Attached SCSI
(SAS) implementation in the Linux kernel when handling certain error
conditions. A local attacker could use this to cause a denial of service
(kernel deadlock). (CVE-2017-18232)

Update instructions:

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

Ubuntu 14.04 ESM:
linux-image-4.4.0-1056-aws 4.4.0-1056.60
linux-image-4.4.0-166-generic 4.4.0-166.195~14.04.1
linux-image-4.4.0-166-generic-lpae 4.4.0-166.195~14.04.1
linux-image-4.4.0-166-lowlatency 4.4.0-166.195~14.04.1
linux-image-4.4.0-166-powerpc-e500mc 4.4.0-166.195~14.04.1
linux-image-4.4.0-166-powerpc-smp 4.4.0-166.195~14.04.1
linux-image-4.4.0-166-powerpc64-emb 4.4.0-166.195~14.04.1
linux-image-4.4.0-166-powerpc64-smp 4.4.0-166.195~14.04.1
linux-image-aws 4.4.0.1056.57
linux-image-generic-lpae-lts-xenial 4.4.0.166.145
linux-image-generic-lts-xenial 4.4.0.166.145
linux-image-lowlatency-lts-xenial 4.4.0.166.145
linux-image-powerpc-e500mc-lts-xenial 4.4.0.166.145
linux-image-powerpc-smp-lts-xenial 4.4.0.166.145
linux-image-powerpc64-emb-lts-xenial 4.4.0.166.145
linux-image-powerpc64-smp-lts-xenial 4.4.0.166.145
linux-image-virtual-lts-xenial 4.4.0.166.145

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
https://usn.ubuntu.com/4163-2
https://usn.ubuntu.com/4163-1
CVE-2016-10906, CVE-2017-18232, CVE-2018-21008, CVE-2019-14814,
CVE-2019-14816, CVE-2019-14821, CVE-2019-15117, CVE-2019-15118,
CVE-2019-15505, CVE-2019-15902

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