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Ubuntu 14.04 LTS USN-2776-1 Critical: Kernel Denial of Service Issues

ubuntu
Calendar Grey October 20, 2015
Scroller Ubuntu
Key kernel problems resolved in Ubuntu 14.04 LTS; specific threats entail Denial of Service and memory mishandling vulnerabilities.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

It was discovered that the Linux kernel did not check if a new IPv6 MTU set

by a user space application was valid. A remote attacker could forge a

route advertisement with an invalid MTU that a user space daemon like

NetworkManager would honor and apply to the kernel, causing a denial of

service. (CVE-2015-0272)

It was discovered that virtio networking in the Linux kernel did not handle

fragments correctly, leading to kernel memory corruption. A remote attacker

could use this to cause a denial of service (system crash) or possibly

execute code with administrative privileges. (CVE-2015-5156)

It was discovered that the Reliable Datagram Sockets (RDS) implementation

in the Linux kernel did not verify sockets were properly bound before

attempting to send a message, which could cause a NULL pointer dereference.

An attacker could use this to cause a denial of ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service memory corruption kernel ubuntu upgrades

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.13.0-66-generic   3.13.0-66.108
  linux-image-3.13.0-66-generic-lpae  3.13.0-66.108
  linux-image-3.13.0-66-lowlatency  3.13.0-66.108
  linux-image-3.13.0-66-powerpc-e500  3.13.0-66.108
  linux-image-3.13.0-66-powerpc-e500mc  3.13.0-66.108
  linux-image-3.13.0-66-powerpc-smp  3.13.0-66.108
  linux-image-3.13.0-66-powerpc64-emb  3.13.0-66.108
  linux-image-3.13.0-66-powerpc64-smp  3.13.0-66.108

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

CVE-2015-0272, CVE-2015-5156, CVE-2015-6937, CVE-2015-7312

Severity
critical
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Critical

October 19, 2015

Topics%20covered

Topics Covered

security advisory denial of service memory corruption kernel ubuntu upgrades

Package Information

https://launchpad.net/ubuntu/+source/linux/3.13.0-66.108

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