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Ubuntu 14.04 LTS USN-2447-2 Moderate: Linux Kernel Regression DoS

ubuntu
Calendar Grey December 19, 2014
Dist Ubuntu Esm H88
Ubuntu Security Notice USN-2447-2 addresses a critical regression in the Linux kernel for Ubuntu 14.04 LTS users.
USN-2447-1 introduced a regression in the Linux kernel.

Summary

USN-2447-1 introduced a regression in the Linux kernel.

Software Description:

- linux-lts-utopic: Linux hardware enablement kernel from Utopic

Details:

USN-2447-1 fixed vulnerabilities in the Linux kernel. Due to an unrelated

regression TCP Throughput drops to zero for several drivers after upgrading.

This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

An information leak in the Linux kernel was discovered that could leak the

high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine

(KVM) paravirt guests. A user in the guest OS could exploit this leak to

obtain information that could potentially be used to aid in attacking the

kernel. (CVE-2014-8134)

Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace

subsystem of the Linux kernel does not properly handle private syscall

numbers. A local user could exploit this flaw to cause a denial of service

(OOPS). (CVE-2014-78...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service ubuntu linux kernel regression tcp throughput

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.16.0-28-generic   3.16.0-28.38~14.04.1
  linux-image-3.16.0-28-generic-lpae  3.16.0-28.38~14.04.1
  linux-image-3.16.0-28-lowlatency  3.16.0-28.38~14.04.1
  linux-image-3.16.0-28-powerpc-e500mc  3.16.0-28.38~14.04.1
  linux-image-3.16.0-28-powerpc-smp  3.16.0-28.38~14.04.1
  linux-image-3.16.0-28-powerpc64-emb  3.16.0-28.38~14.04.1
  linux-image-3.16.0-28-powerpc64-smp  3.16.0-28.38~14.04.1

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

https://ubuntu.com/security/notices/USN-2447-1

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1390604

December 19, 2014

Topics%20covered

Topics Covered

security advisory denial of service ubuntu linux kernel regression tcp throughput

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-28.38~14.04.1

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