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Ubuntu 14.04 LTS: USN-2447-1 Critical Fixes for Kernel Issues

ubuntu
Calendar Grey December 12, 2014
Dist Ubuntu Esm H88
Multiple kernel vulnerabilities addressed in Ubuntu 14.04 LTS via USN-2447-1. Update promptly to mitigate risks of exploitation.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

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

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-2014-7826)

A flaw in the handling of malformed ASCONF chunks by SCTP (Stream Control

Transmission Protocol) implementation in the Linux kernel was discovered. A

remote attacker could exploit this flaw to cause a denial of service

(system crash). (CVE-2014-3673)

A flaw i...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service information leak critical kernel ubuntu

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   3.16.0-28.37~14.04.1
  linux-image-3.16.0-28-generic-lpae  3.16.0-28.37~14.04.1
  linux-image-3.16.0-28-lowlatency  3.16.0-28.37~14.04.1
  linux-image-3.16.0-28-powerpc-e500mc  3.16.0-28.37~14.04.1
  linux-image-3.16.0-28-powerpc-smp  3.16.0-28.37~14.04.1
  linux-image-3.16.0-28-powerpc64-emb  3.16.0-28.37~14.04.1
  linux-image-3.16.0-28-powerpc64-smp  3.16.0-28.37~14.04.1

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-2447-1

CVE-2014-3673, CVE-2014-3687, CVE-2014-3688, CVE-2014-7825,

CVE-2014-7826, CVE-2014-7970, CVE-2014-8086, CVE-2014-8134,

CVE-2014-8369, CVE-2014-9090

Severity
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December 12, 2014

Topics%20covered

Topics Covered

security advisory denial of service information leak critical kernel ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-28.37~14.04.1

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