ESB-2018.1576 - [Ubuntu] linux kernel: Multiple vulnerabilities 2018-05-23

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1576
         Linux kernel (Raspberry Pi 2, Snapdragon) vulnerabilities
                                23 May 2018

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           linux-raspi2
                   linux-snapdragon
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
                   Access Privileged Data          -- Existing Account
                   Denial of Service               -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-8822 CVE-2018-8781 CVE-2018-7995
                   CVE-2018-7757 CVE-2018-7480 CVE-2018-5803
                   CVE-2018-1130 CVE-2018-1068 CVE-2018-1065
                   CVE-2017-18222 CVE-2017-18208 CVE-2017-18203
                   CVE-2017-18193 CVE-2017-17975 CVE-2017-17449

Reference:         ESB-2018.1575
                   ESB-2018.1549
                   ESB-2018.1359
                   ESB-2018.1336

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3656-1
   http://www.ubuntu.com/usn/usn-3657-1

Comment: This bulletin contains two (2) Ubuntu security advisories.

- --------------------------BEGIN INCLUDED TEXT--------------------

USN-3656-1: Linux kernel (Raspberry Pi 2, Snapdragon) vulnerabilities

22 May 2018

linux-raspi2, linux-snapdragon vulnerabilities

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

  o Ubuntu 16.04 LTS

Summary

Several security issues were fixed in the Linux kernel.

Software Description

  o linux-raspi2 - Linux kernel for Raspberry Pi 2
  o linux-snapdragon - Linux kernel for Snapdragon processors

Details

Tuba Yavuz discovered that a double-free error existed in the USBTV007 driver
of the Linux kernel. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2017-17975)

It was discovered that a race condition existed in the F2FS implementation in
the Linux kernel. A local attacker could use this to cause a denial of service
(system crash). (CVE-2017-18193)

It was discovered that a buffer overflow existed in the Hisilicon HNS Ethernet
Device 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-2017-18222)

It was discovered that the netfilter subsystem in the Linux kernel did not
validate that rules containing jumps contained user-defined chains. A local
attacker could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2018-1065)

It was discovered that the netfilter subsystem of the Linux kernel did not
properly validate ebtables offsets. A local attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2018-1068)

It was discovered that a null pointer dereference vulnerability existed in the
DCCP protocol implementation in the Linux kernel. A local attacker could use
this to cause a denial of service (system crash). (CVE-2018-1130)

It was discovered that the SCTP Protocol implementation in the Linux kernel did
not properly validate userspace provided payload lengths in some situations. A
local attacker could use this to cause a denial of service (system crash).
(CVE-2018-5803)

It was discovered that a double free error existed in the block layer subsystem
of the Linux kernel when setting up a request queue. A local attacker could use
this to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2018-7480)

It was discovered that a memory leak existed in the SAS driver subsystem of the
Linux kernel. A local attacker could use this to cause a denial of service
(memory exhaustion). (CVE-2018-7757)

It was discovered that a race condition existed in the x86 machine check
handler in the Linux kernel. A local privileged attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary code.
(CVE-2018-7995)

Eyal Itkin discovered that the USB displaylink video adapter driver in the
Linux kernel did not properly validate mmap offsets sent from userspace. A
local attacker could use this to expose sensitive information (kernel memory)
or possibly execute arbitrary code. (CVE-2018-8781)

Silvio Cesare discovered a buffer overwrite existed in the NCPFS implementation
in the Linux kernel. A remote attacker controlling a malicious NCPFS server
could use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2018-8822)

Update instructions

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

Ubuntu 16.04 LTS
    linux-image-4.4.0-1090-raspi2 - 4.4.0-1090.98
    linux-image-4.4.0-1093-snapdragon - 4.4.0-1093.98
    linux-image-raspi2 - 4.4.0.1090.90
    linux-image-snapdragon - 4.4.0.1093.85

To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades.

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

  o CVE-2017-17975
  o CVE-2017-18193
  o CVE-2017-18222
  o CVE-2018-1065
  o CVE-2018-1068
  o CVE-2018-1130
  o CVE-2018-5803
  o CVE-2018-7480
  o CVE-2018-7757
  o CVE-2018-7995
  o CVE-2018-8781
  o CVE-2018-8822


- --------------------------------------------------------------------------------

USN-3657-1: Linux kernel (Raspberry Pi 2) vulnerabilities

22 May 2018

linux-raspi2 vulnerabilities

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

  o Ubuntu 17.10

Summary

Several security issues were fixed in the Linux kernel.

Software Description

  o linux-raspi2 - Linux kernel for Raspberry Pi 2

Details

It was discovered that the netlink subsystem in the Linux kernel did not
properly restrict observations of netlink messages to the appropriate net
namespace. A local attacker could use this to expose sensitive information
(kernel netlink traffic). (CVE-2017-17449)

Tuba Yavuz discovered that a double-free error existed in the USBTV007 driver
of the Linux kernel. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2017-17975)

It was discovered that a race condition existed in the Device Mapper component
of the Linux kernel. A local attacker could use this to cause a denial of
service (system crash). (CVE-2017-18203)

It was discovered that an infinite loop could occur in the madvise(2)
implementation in the Linux kernel in certain circumstances. A local attacker
could use this to cause a denial of service (system hang). (CVE-2017-18208)

Silvio Cesare discovered a buffer overwrite existed in the NCPFS implementation
in the Linux kernel. A remote attacker controlling a malicious NCPFS server
could use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2018-8822)

Update instructions

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

Ubuntu 17.10
    linux-image-4.13.0-1020-raspi2 - 4.13.0-1020.21
    linux-image-raspi2 - 4.13.0.1020.18

To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades.

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

  o CVE-2017-17449
  o CVE-2017-17975
  o CVE-2017-18203
  o CVE-2017-18208
  o CVE-2018-8822

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