Ubuntu Security Notice USN-3208-1
22nd February, 2017
linux, linux-snapdragon vulnerabilities
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 16.04 LTS
Summary
Several security issues were fixed in the kernel.
Software description
- linux
– Linux kernel - linux-snapdragon
– Linux kernel for Snapdragon Processors
Details
It was discovered that the generic SCSI block layer in the Linux kernel did
not properly restrict write operations in certain situations. A local
attacker could use this to cause a denial of service (system crash) or
possibly gain administrative privileges. (CVE-2016-10088)
CAI Qian discovered that the sysctl implementation in the Linux kernel did
not properly perform reference counting in some situations. An unprivileged
attacker could use this to cause a denial of service (system hang).
(CVE-2016-9191)
Jim Mattson discovered that the KVM implementation in the Linux kernel
mismanages the #BP and #OF exceptions. A local attacker in a guest virtual
machine could use this to cause a denial of service (guest OS crash).
(CVE-2016-9588)
Andy Lutomirski and Willy Tarreau discovered that the KVM implementation in
the Linux kernel did not properly emulate instructions on the SS segment
register. A local attacker in a guest virtual machine could use this to
cause a denial of service (guest OS crash) or possibly gain administrative
privileges in the guest OS. (CVE-2017-2583)
Dmitry Vyukov discovered that the KVM implementation in the Linux kernel
improperly emulated certain instructions. A local attacker could use this
to obtain sensitive information (kernel memory). (CVE-2017-2584)
It was discovered that the KLSI KL5KUSB105 serial-to-USB device driver in
the Linux kernel did not properly initialize memory related to logging. A
local attacker could use this to expose sensitive information (kernel
memory). (CVE-2017-5549)
Andrey Konovalov discovered a use-after-free vulnerability in the DCCP
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash) or possibly gain administrative
privileges. (CVE-2017-6074)
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 16.04 LTS:
-
linux-image-4.4.0-64-powerpc64-emb
4.4.0-64.85
-
linux-image-4.4.0-64-powerpc64-smp
4.4.0-64.85
- linux-image-powerpc-e500mc 4.4.0.64.68
-
linux-image-4.4.0-64-generic
4.4.0-64.85
- linux-image-powerpc-smp 4.4.0.64.68
- linux-image-generic 4.4.0.64.68
-
linux-image-4.4.0-64-powerpc-e500mc
4.4.0-64.85
- linux-image-lowlatency 4.4.0.64.68
-
linux-image-4.4.0-64-powerpc-smp
4.4.0-64.85
-
linux-image-4.4.0-64-lowlatency
4.4.0-64.85
- linux-image-powerpc64-smp 4.4.0.64.68
- linux-image-generic-lpae 4.4.0.64.68
- linux-image-snapdragon 4.4.0.1048.40
-
linux-image-4.4.0-64-generic-lpae
4.4.0-64.85
- linux-image-powerpc64-emb 4.4.0.64.68
-
linux-image-4.4.0-1048-snapdragon
4.4.0-1048.52
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.