ESB-2018.1262 - [Ubuntu] kernel: Multiple vulnerabilities 2018-04-26

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1262
                        Linux kernel vulnerability
                               26 April 2018

===========================================================================

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

Product:           kernel
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Root Compromise                -- Existing Account
                   Access Privileged Data         -- Existing Account
                   Denial of Service              -- Existing Account
                   Provide Misleading Information -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-1000026 CVE-2018-1000004 CVE-2018-8043
                   CVE-2018-7566 CVE-2018-5750 CVE-2018-5344
                   CVE-2018-5333 CVE-2018-5332 CVE-2017-1000407
                   CVE-2017-17807 CVE-2017-17806 CVE-2017-17805
                   CVE-2017-17741 CVE-2017-17450 CVE-2017-17448
                   CVE-2017-16995 CVE-2017-16994 CVE-2017-16538
                   CVE-2017-15129 CVE-2017-13305 CVE-2017-0861

Reference:         ESB-2018.1240
                   ESB-2018.1229
                   ESB-2018.1104
                   ESB-2018.1090
                   ESB-2018.1046
                   ESB-2018.0430
                   ESB-2018.0392
                   ESB-2017.2855

Original Bulletin: 
   https://usn.ubuntu.com/3630-2/
   https://usn.ubuntu.com/3631-2/
   https://usn.ubuntu.com/3632-1/
   https://usn.ubuntu.com/3633-1/

Comment: This bulletin contains four (4) Ubuntu security advisories.

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

USN-3630-2: Linux kernel (HWE) vulnerability

24 April 2018
linux-hwe, linux-gcp, linux-oem vulnerability

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

    Ubuntu 16.04 LTS

Summary

The system could be made to crash under certain conditions.

Software Description

    linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
    linux-hwe - Linux hardware enablement (HWE) kernel
    linux-oem - Linux kernel for OEM processors

Details

USN-3630-1 fixed a vulnerability in the Linux kernel for Ubuntu 17.10. This
update provides the corresponding updates for the Linux Hardware Enablement
(HWE) kernel from Ubuntu 17.10 for Ubuntu 16.04 LTS.

It was discovered that the Broadcom UniMAC MDIO bus controller driver
in the Linux kernel did not properly validate device resources. A local
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 16.04 LTS
    linux-image-4.13.0-1013-gcp - 4.13.0-1013.17
    linux-image-4.13.0-1024-oem - 4.13.0-1024.27
    linux-image-4.13.0-39-generic - 4.13.0-39.44~16.04.1
    linux-image-4.13.0-39-generic-lpae - 4.13.0-39.44~16.04.1
    linux-image-4.13.0-39-lowlatency - 4.13.0-39.44~16.04.1
    linux-image-gcp - 4.13.0.1013.15
    linux-image-generic-hwe-16.04 - 4.13.0.39.58
    linux-image-generic-lpae-hwe-16.04 - 4.13.0.39.58
    linux-image-gke - 4.13.0.1013.15
    linux-image-lowlatency-hwe-16.04 - 4.13.0.39.58
    linux-image-oem - 4.13.0.1024.28

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

    USN-3630-1
    CVE-2018-8043

- ---

USN-3631-2: Linux kernel (Xenial HWE) vulnerabilities

24 April 2018
linux-lts-xenial, linux-aws 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-aws - Linux kernel for Amazon Web Services (AWS) systems
    linux-lts-xenial - Linux hardware enablement kernel from Xenial
    for Trusty

Details

USN-3631-1 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 overread vulnerability existed in the
keyring subsystem of the Linux kernel. A local attacker could possibly
use this to expose sensitive information (kernel memory). (CVE-2017-13305)

It was discovered that the DM04/QQBOX USB driver in the Linux kernel
did not properly handle device attachment and warm-start. A physically
proximate attacker could use this to cause a denial of service (system
crash) or possibly execute arbitrary code. (CVE-2017-16538)

Luo Quan and Wei Yang discovered that a race condition existed in the
Advanced Linux Sound Architecture (ALSA) subsystem of the Linux kernel
when handling ioctl()s. A local attacker could use this to cause a denial
of service (system deadlock). (CVE-2018-1000004)

Wang Qize discovered that an information disclosure vulnerability existed
in the SMBus driver for ACPI Embedded Controllers in the Linux kernel. A
local attacker could use this to expose sensitive information (kernel
pointer addresses). (CVE-2018-5750)

??? discovered that a race condition existed in the Advanced Linux
Sound Architecture (ALSA) subsystem of the Linux kernel that could lead
to a use-after-free or an out-of-bounds buffer access. A local attacker
with access to /dev/snd/seq could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2018-7566)

Update instructions

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

Ubuntu 14.04 LTS
    linux-image-4.4.0-1017-aws - 4.4.0-1017.17
    linux-image-4.4.0-121-generic - 4.4.0-121.145~14.04.1
    linux-image-4.4.0-121-generic-lpae - 4.4.0-121.145~14.04.1
    linux-image-4.4.0-121-lowlatency - 4.4.0-121.145~14.04.1
    linux-image-4.4.0-121-powerpc-e500mc - 4.4.0-121.145~14.04.1
    linux-image-4.4.0-121-powerpc-smp - 4.4.0-121.145~14.04.1
    linux-image-4.4.0-121-powerpc64-emb - 4.4.0-121.145~14.04.1
    linux-image-4.4.0-121-powerpc64-smp - 4.4.0-121.145~14.04.1
    linux-image-aws - 4.4.0.1017.17
    linux-image-generic-lpae-lts-xenial - 4.4.0.121.102
    linux-image-generic-lts-xenial - 4.4.0.121.102
    linux-image-lowlatency-lts-xenial - 4.4.0.121.102
    linux-image-powerpc-e500mc-lts-xenial - 4.4.0.121.102
    linux-image-powerpc-smp-lts-xenial - 4.4.0.121.102
    linux-image-powerpc64-emb-lts-xenial - 4.4.0.121.102
    linux-image-powerpc64-smp-lts-xenial - 4.4.0.121.102

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

    USN-3631-1
    CVE-2017-13305
    CVE-2017-16538
    CVE-2018-1000004
    CVE-2018-5750
    CVE-2018-7566

- ---

USN-3632-1: Linux kernel (Azure) vulnerabilities

24 April 2018
linux-azure 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-azure - Linux kernel for Microsoft Azure Cloud systems

Details

It was discovered that a race condition leading to a use-after-free
vulnerability existed in the ALSA PCM 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-2017-0861)

It was discovered that the KVM implementation in the Linux kernel allowed
passthrough of the diagnostic I/O port 0x80. An attacker in a guest VM
could use this to cause a denial of service (system crash) in the host
OS. (CVE-2017-1000407)

It was discovered that a use-after-free vulnerability existed in the
network namespaces 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-2017-15129)

It was discovered that the HugeTLB component of the Linux kernel did not
properly handle holes in hugetlb ranges. A local attacker could use this
to expose sensitive information (kernel memory). (CVE-2017-16994)

It was discovered that the netfilter component of the Linux did not properly
restrict access to the connection tracking helpers list. A local attacker
could use this to bypass intended access restrictions. (CVE-2017-17448)

It was discovered that the netfilter passive OS fingerprinting (xt_osf)
module did not properly perform access control checks. A local attacker
could improperly modify the system-wide OS fingerprint list. (CVE-2017-17450)

Dmitry Vyukov discovered that the KVM implementation in the Linux kernel
contained an out-of-bounds read when handling memory-mapped I/O. A local
attacker could use this to expose sensitive information. (CVE-2017-17741)

It was discovered that the Salsa20 encryption algorithm implementations in
the Linux kernel did not properly handle zero-length inputs. A local attacker
could use this to cause a denial of service (system crash). (CVE-2017-17805)

It was discovered that the HMAC implementation did not validate the state
of the underlying cryptographic hash algorithm. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-17806)

It was discovered that the keyring implementation in the Linux kernel
did not properly check permissions when a key request was performed on a
task's default keyring. A local attacker could use this to add keys to
unauthorized keyrings. (CVE-2017-17807)

It was discovered that the Broadcom NetXtremeII ethernet driver in the
Linux kernel did not properly validate Generic Segment Offload (GSO)
packet sizes. An attacker could use this to cause a denial of service
(interface unavailability). (CVE-2018-1000026)

It was discovered that the Reliable Datagram Socket (RDS) implementation
in the Linux kernel contained an out-of-bounds write during RDMA page
allocation. An attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2018-5332)

Mohamed Ghannam discovered a null pointer dereference in the RDS
(Reliable Datagram Sockets) protocol implementation of the Linux
kernel. A local attacker could use this to cause a denial of service
(system crash). (CVE-2018-5333)

??? discovered that a race condition existed in loop block device
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-2018-5344)

It was discovered that the Broadcom UniMAC MDIO bus controller driver in the
Linux kernel did not properly validate device resources. A local attacker
could use this to cause a denial of service (system crash). (CVE-2018-8043)

Update instructions

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

Ubuntu 16.04 LTS
    linux-image-4.13.0-1014-azure - 4.13.0-1014.17
    linux-image-azure - 4.13.0.1014.16

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

    CVE-2017-0861
    CVE-2017-1000407
    CVE-2017-15129
    CVE-2017-16994
    CVE-2017-17448
    CVE-2017-17450
    CVE-2017-17741
    CVE-2017-17805
    CVE-2017-17806
    CVE-2017-17807
    CVE-2018-1000026
    CVE-2018-5332
    CVE-2018-5333
    CVE-2018-5344
    CVE-2018-8043

- ---

USN-3633-1: Linux kernel (Intel Euclid) vulnerability

24 April 2018
linux-euclid vulnerability

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

    Ubuntu 16.04 LTS

Summary

The system could be made to crash or run programs as an administrator.

Software Description

    linux-euclid - Linux kernel for Intel Euclid systems

Details

Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation in
the Linux kernel improperly performed sign extension in some situations. A
local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code.

Update instructions

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

Ubuntu 16.04 LTS
    linux-image-4.4.0-9026-euclid - 4.4.0-9026.28
    linux-image-euclid - 4.4.0.9026.27

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

    CVE-2017-16995

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