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

24 April 2018

Several security issues were fixed in the Linux kernel.

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Releases

Packages

  • 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)

范龙飞 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)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 16.04

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.

Related notices

  • USN-3583-2: linux-image-generic-lpae-lts-trusty, linux-image-generic-lts-trusty, linux-image-3.13.0-142-generic, linux-lts-trusty, linux-image-3.13.0-142-generic-lpae
  • USN-3619-2: linux-image-4.4.0-1016-aws, linux-aws, linux-image-4.4.0-119-lowlatency, linux-image-4.4.0-119-powerpc-smp, linux-image-4.4.0-119-powerpc64-smp, linux-image-4.4.0-119-generic-lpae, linux-image-extra-4.4.0-119-generic, linux-image-4.4.0-119-powerpc64-emb, linux-image-4.4.0-119-powerpc-e500mc, linux-image-4.4.0-119-generic, linux-lts-xenial
  • USN-3617-1: linux-image-4.13.0-38-lowlatency, linux-image-4.13.0-38-generic-lpae, linux-image-lowlatency, linux-image-generic, linux, linux-image-4.13.0-38-generic, linux-image-generic-lpae
  • USN-3619-1: linux-image-4.4.0-1054-aws, linux-snapdragon, linux-aws, linux-image-4.4.0-119-lowlatency, linux-kvm, linux-image-4.4.0-1088-snapdragon, linux-image-4.4.0-119-powerpc-smp, linux-image-4.4.0-1020-kvm, linux-image-4.4.0-119-powerpc64-smp, linux-image-4.4.0-119-generic-lpae, linux-image-extra-4.4.0-119-generic, linux-image-4.4.0-119-powerpc64-emb, linux-image-4.4.0-119-powerpc-e500mc, linux-image-4.4.0-1086-raspi2, linux, linux-image-4.4.0-119-generic, linux-raspi2
  • USN-3617-3: linux-image-4.13.0-1016-raspi2, linux-raspi2, linux-image-raspi2
  • USN-3617-2: linux-image-extra-4.13.0-1012-gcp, linux-image-4.13.0-38-lowlatency, linux-image-4.13.0-38-generic-lpae, linux-image-4.13.0-1022-oem, linux-image-4.13.0-1012-gcp, linux-image-extra-4.13.0-38-generic, linux-hwe, linux-gcp, linux-image-4.13.0-38-generic, linux-oem
  • USN-3583-1: linux-image-3.13.0-142-powerpc-e500, linux-image-3.13.0-142-powerpc64-smp, linux-image-3.13.0-142-generic, linux-image-3.13.0-142-powerpc-e500mc, linux-image-extra-3.13.0-142-generic, linux-image-3.13.0-142-powerpc-smp, linux, linux-image-3.13.0-142-powerpc64-emb, linux-image-3.13.0-142-generic-lpae, linux-image-3.13.0-142-lowlatency
  • USN-3620-1: linux-image-3.13.0-144-powerpc-e500, linux-image-3.13.0-144-generic-lpae, linux-image-3.13.0-144-powerpc64-smp, linux-image-3.13.0-144-powerpc-e500mc, linux-image-3.13.0-144-lowlatency, linux-image-3.13.0-144-powerpc64-emb, linux-image-3.13.0-144-powerpc-smp, linux-image-extra-3.13.0-144-generic, linux, linux-image-3.13.0-144-generic
  • USN-3620-2: linux-image-generic-lpae-lts-trusty, linux-image-generic-lts-trusty, linux-image-3.13.0-144-generic-lpae, linux-lts-trusty, linux-image-3.13.0-144-generic
  • USN-3630-2: linux-image-4.13.0-1013-gcp, linux-image-4.13.0-1024-oem, linux-image-4.13.0-39-generic-lpae, linux-image-extra-4.13.0-39-generic, linux-image-4.13.0-39-lowlatency, linux-image-4.13.0-39-generic, linux-hwe, linux-oem, linux-gcp, linux-image-extra-4.13.0-1013-gcp
  • USN-3630-1: linux-image-lowlatency, linux-image-4.13.0-1017-raspi2, linux-image-4.13.0-39-generic-lpae, linux-image-raspi2, linux-image-4.13.0-39-lowlatency, linux-image-generic, linux-image-4.13.0-39-generic, linux, linux-raspi2, linux-image-generic-lpae