6.9 - USN-3698-1

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 nested KVM implementation in the Linux kernel in some situations did not properly prevent second level guests from reading and writing the hardware CR8 register. A local attacker in a guest could use this to cause a denial of service (system crash). (CVE-2017-12154)

Fan Wu, Haoran Qiu, and Shixiong Zhao discovered that the associative array implementation in the Linux kernel sometimes did not properly handle adding a new entry. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-12193)

It was discovered that a race condition existed in the ALSA subsystem of the Linux kernel when creating and deleting a port via ioctl(). A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-15265)

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)

Julian Stecklina and Thomas Prescher discovered that FPU register states (such as MMX, SSE, and AVX registers) which are lazily restored are potentially vulnerable to a side channel attack. A local attacker could use this to expose sensitive information. (CVE-2018-3665)

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)

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 an integer overflow error existed in the futex implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2018-6927)

It was discovered that an information leak vulnerability existed in the floppy driver in the Linux kernel. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2018-7755)

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)

Update instructions:

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

Ubuntu 14.04 LTS:
linux-image-3.13.0-153-generic 3.13.0-153.203
linux-image-3.13.0-153-generic-lpae 3.13.0-153.203
linux-image-3.13.0-153-lowlatency 3.13.0-153.203
linux-image-3.13.0-153-powerpc-e500 3.13.0-153.203
linux-image-3.13.0-153-powerpc-e500mc 3.13.0-153.203
linux-image-3.13.0-153-powerpc-smp 3.13.0-153.203
linux-image-3.13.0-153-powerpc64-emb 3.13.0-153.203
linux-image-3.13.0-153-powerpc64-smp 3.13.0-153.203
linux-image-generic 3.13.0.153.163
linux-image-generic-lpae 3.13.0.153.163
linux-image-lowlatency 3.13.0.153.163
linux-image-powerpc-e500 3.13.0.153.163
linux-image-powerpc-e500mc 3.13.0.153.163
linux-image-powerpc-smp 3.13.0.153.163
linux-image-powerpc64-emb 3.13.0.153.163
linux-image-powerpc64-smp 3.13.0.153.163

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-3698-1
CVE-2017-12154, CVE-2017-12193, CVE-2017-15265, CVE-2018-1130,
CVE-2018-3665, CVE-2018-5750, CVE-2018-5803, CVE-2018-6927,
CVE-2018-7755, CVE-2018-7757

Package Information:
https://launchpad.net/ubuntu/+source/linux/3.13.0-153.203