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Ubuntu 14.04 LTS USN-2777-1 moderate: Linux Kernel DoS Threats

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Calendar Grey October 20, 2015
Scroller Ubuntu
=========================================================================Ubuntu Security Notice USN-
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:

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)

Benjamin Randazzo discovered an information leak in the md (multiple

device) driver when the bitmap_info.file is disabled. A local privileged

attacker could use this to obtain sensitive information from the kernel.

(CVE-2015-5697)

Marc-André Lureau discovered that the vhost driver did not properly

release the userspace provided log file descriptor. A privileged attacker

could use this to cause a denial of service (resource exhaustion).

(CVE-2015-6252)

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

in th...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service access control kernel info leak ubuntu hardware enablement

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.16.0-51-generic   3.16.0-51.69~14.04.1
  linux-image-3.16.0-51-generic-lpae  3.16.0-51.69~14.04.1
  linux-image-3.16.0-51-lowlatency  3.16.0-51.69~14.04.1
  linux-image-3.16.0-51-powerpc-e500mc  3.16.0-51.69~14.04.1
  linux-image-3.16.0-51-powerpc-smp  3.16.0-51.69~14.04.1
  linux-image-3.16.0-51-powerpc64-emb  3.16.0-51.69~14.04.1
  linux-image-3.16.0-51-powerpc64-smp  3.16.0-51.69~14.04.1

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-2777-1

CVE-2015-5156, CVE-2015-5697, CVE-2015-6252, CVE-2015-6937,

CVE-2015-7312

Severity
important
Lowest
Low
Medium
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Critical

October 20, 2015

Topics%20covered

Topics Covered

security advisory denial of service access control kernel info leak ubuntu hardware enablement

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-51.69~14.04.1

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