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Ubuntu 14.10 Security Advisory USN-2590-1 High Risk Kernel Flaws

ubuntu
Calendar Grey April 30, 2015
Dist Ubuntu Esm H88
Multiple vulnerabilities were resolved in the Linux kernel for Ubuntu, improving overall performance and safeguarding the system.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

Jan Beulich discovered the Xen virtual machine subsystem of the Linux

kernel did not properly restrict access to PCI command registers. A local

guest user could exploit this flaw to cause a denial of service (host

crash). (CVE-2015-2150)

A stack overflow was discovered in the the microcode loader for the intel

x86 platform. A local attacker could exploit this flaw to cause a denial of

service (kernel crash) or to potentially execute code with kernel

privileges. (CVE-2015-2666)

A privilege escalation was discovered in the fork syscal vi the int80 entry

on 64 bit kernels with 32 bit emulation support. An unprivileged local

attacker could exploit this flaw to increase their privileges on the

system. (CVE-2015-2830)

It was discovered that the Linux kernel's IPv6 networking stack has a flaw

that allows using route advertisement (RA) messages to set the 'ho...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel high ubuntu

Update Instructions

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

Ubuntu 14.10:
  linux-image-3.16.0-36-generic   3.16.0-36.48
  linux-image-3.16.0-36-generic-lpae  3.16.0-36.48
  linux-image-3.16.0-36-lowlatency  3.16.0-36.48
  linux-image-3.16.0-36-powerpc-e500mc  3.16.0-36.48
  linux-image-3.16.0-36-powerpc-smp  3.16.0-36.48
  linux-image-3.16.0-36-powerpc64-emb  3.16.0-36.48
  linux-image-3.16.0-36-powerpc64-smp  3.16.0-36.48

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. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

References

https://ubuntu.com/security/notices/USN-2590-1

CVE-2015-2150, CVE-2015-2666, CVE-2015-2830, CVE-2015-2922

April 30, 2015

Topics%20covered

Topics Covered

security advisory denial of service kernel high ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux/3.16.0-36.48

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