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Ubuntu 14.04 LTS USN-3470-1 Critical Kernel Flaws: Denial Of Service

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Calendar Grey October 31, 2017
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Multiple vulnerabilities in the Linux kernel call for urgent patches for Ubuntu 14.04 LTS to address potential threats from local attackers and exploits.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

Details:

Qian Zhang discovered a heap-based buffer overflow in the tipc_msg_build()

function in the Linux kernel. A local attacker could use to cause a denial

of service (system crash) or possibly execute arbitrary code with

administrative privileges. (CVE-2016-8632)

Dmitry Vyukov discovered that a race condition existed in the timerfd

subsystem of the Linux kernel when handling might_cancel queuing. A local

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

possibly execute arbitrary code. (CVE-2017-10661)

It was discovered that the Flash-Friendly File System (f2fs) implementation

in the Linux kernel did not properly validate superblock metadata. A local

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

possibly execute arbitrary code. (CVE-2017-10662, CVE-2017-10663)

Anthony Perard discovered that the Xen virtual block driver did not

p...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow Ubuntu kernel system update local attack

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.13.0-135-generic  3.13.0-135.184
  linux-image-3.13.0-135-generic-lpae  3.13.0-135.184
  linux-image-3.13.0-135-lowlatency  3.13.0-135.184
  linux-image-3.13.0-135-powerpc-e500  3.13.0-135.184
  linux-image-3.13.0-135-powerpc-e500mc  3.13.0-135.184
  linux-image-3.13.0-135-powerpc-smp  3.13.0-135.184
  linux-image-3.13.0-135-powerpc64-emb  3.13.0-135.184
  linux-image-3.13.0-135-powerpc64-smp  3.13.0-135.184
  linux-image-generic             3.13.0.135.144
  linux-image-generic-lpae        3.13.0.135.144
  linux-image-lowlatency          3.13.0.135.144
  linux-image-powerpc-e500        3.13.0.135.144
  linux-image-powerpc-e500mc      3.13.0.135.144
  linux-image-powerpc-smp         3.13.0.135.144
  linux-image-powerpc64-emb       3.13.0.135.144
  linux-image-powerpc64-smp       3.13.0.135.144

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.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

https://ubuntu.com/security/notices/USN-3470-1

CVE-2016-8632, CVE-2017-10661, CVE-2017-10662, CVE-2017-10663,

CVE-2017-10911, CVE-2017-11176, CVE-2017-14340

Severity
critical
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Critical

October 31, 2017

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow Ubuntu kernel system update local attack

Package Information

https://launchpad.net/ubuntu/+source/linux/3.13.0-135.184

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