[USN-3620-1] Linux kernel vulnerabilities

[Steve Beattie]

==========================================================================
Ubuntu Security Notice USN-3620-1
April 04, 2018

linux 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: Linux kernel

Details:

It was discovered that the netlink 802.11 configuration interface in the
Linux kernel did not properly validate some attributes passed from
userspace. A local attacker with the CAP_NET_ADMIN privilege could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2017-11089)

It was discovered that a buffer overflow existed in the ioctl handling code
in the ISDN 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-2017-12762)

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)

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 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)

Update instructions:

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

Ubuntu 14.04 LTS:
  linux-image-3.13.0-144-generic  3.13.0-144.193
  linux-image-3.13.0-144-generic-lpae  3.13.0-144.193
  linux-image-3.13.0-144-lowlatency  3.13.0-144.193
  linux-image-3.13.0-144-powerpc-e500  3.13.0-144.193
  linux-image-3.13.0-144-powerpc-e500mc  3.13.0-144.193
  linux-image-3.13.0-144-powerpc-smp  3.13.0-144.193
  linux-image-3.13.0-144-powerpc64-emb  3.13.0-144.193
  linux-image-3.13.0-144-powerpc64-smp  3.13.0-144.193
  linux-image-generic             3.13.0.144.154
  linux-image-generic-lpae        3.13.0.144.154
  linux-image-lowlatency          3.13.0.144.154
  linux-image-powerpc-e500        3.13.0.144.154
  linux-image-powerpc-e500mc      3.13.0.144.154
  linux-image-powerpc-smp         3.13.0.144.154
  linux-image-powerpc64-emb       3.13.0.144.154
  linux-image-powerpc64-smp       3.13.0.144.154

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/usn/usn-3620-1
  CVE-2017-11089, CVE-2017-12762, CVE-2017-17448, CVE-2017-17741,
  CVE-2017-17805, CVE-2017-17807, CVE-2018-1000026, CVE-2018-5332

Package Information:
  https://launchpad.net/ubuntu/+source/linux/3.13.0-144.193

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