[LSN-0058-1] Linux kernel vulnerability

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[LSN-0058-1] Linux kernel vulnerability

Benjamin M Romer
==========================================================================
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 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)

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)

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)

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-2019-14815)

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-2019-14816)

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)

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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