USN-3360-2: Linux kernel (Trusty HWE) vulnerabilities

Ubuntu Security Notice USN-3360-2

21st July, 2017

linux-lts-trusty vulnerabilities

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

• Ubuntu 12.04 LTS

Summary

Several security issues were fixed in the Linux kernel.

Software description

• linux-lts-trusty
  - Linux hardware enablement kernel from Trusty for Precise
  
  

Details

USN-3360-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu
12.04 ESM.

It was discovered that the Linux kernel did not properly initialize a Wake-
on-Lan data structure. A local attacker could use this to expose sensitive
information (kernel memory). ()

It was discovered that a use-after-free vulnerability existed in the
performance events and counters subsystem of the Linux kernel for ARM64. A
local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. ()

Sasha Levin discovered that a race condition existed in the performance
events and counters subsystem of the Linux kernel when handling CPU unplug
events. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. ()

It was discovered that the fcntl64() system call in the Linux kernel did
not properly set memory limits when returning on 32-bit ARM processors. A
local attacker could use this to gain administrative privileges.
()

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. ()

Li Qiang discovered that the DRM driver for VMware Virtual GPUs in the
Linux kernel did not properly validate some ioctl arguments. A local
attacker could use this to cause a denial of service (system crash).
()

It was discovered that an integer underflow existed in the Edgeport USB
Serial Converter device driver of the Linux kernel. An attacker with
physical access could use this to expose sensitive information (kernel
memory). ()

Andrey Konovalov discovered an IPv6 out-of-bounds read error in the Linux
kernel's IPv6 stack. A local attacker could cause a denial of service or
potentially other unspecified problems. ()

Update instructions

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

Ubuntu 12.04 LTS:

To update your system, please follow these instructions:
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CVE-2017-9605