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Ubuntu 14.04 LTS: USN-3100-1 Severe Kernel Security Flaw Detected

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Calendar Grey October 11, 2016
Scroller Ubuntu
Ubuntu 14.04 LTS has been updated with essential kernel patches that mitigate various security vulnerabilities and possible system stability issues.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

Vladimír Beneš discovered an unbounded recursion in the VLAN and TEB

Generic Receive Offload (GRO) processing implementations in the Linux

kernel, A remote attacker could use this to cause a stack corruption,

leading to a denial of service (system crash). (CVE-2016-7039)

Marco Grassi discovered a use-after-free condition could occur in the TCP

retransmit queue handling code in the Linux kernel. A local attacker could

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

arbitrary code. (CVE-2016-6828)

Pengfei Wang discovered a race condition in the audit subsystem in the

Linux kernel. A local attacker could use this to corrupt audit logs or

disrupt system-call auditing. (CVE-2016-6136)

Pengfei Wang discovered a race condition in the Adaptec AAC RAID controller

driver in the Linux kernel when handling ioctl()s. A local attacker could

...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu kernel

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.13.0-98-generic   3.13.0-98.145
  linux-image-3.13.0-98-generic-lpae  3.13.0-98.145
  linux-image-3.13.0-98-lowlatency  3.13.0-98.145
  linux-image-3.13.0-98-powerpc-e500  3.13.0-98.145
  linux-image-3.13.0-98-powerpc-e500mc  3.13.0-98.145
  linux-image-3.13.0-98-powerpc-smp  3.13.0-98.145
  linux-image-3.13.0-98-powerpc64-emb  3.13.0-98.145
  linux-image-3.13.0-98-powerpc64-smp  3.13.0-98.145

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

CVE-2016-6136, CVE-2016-6480, CVE-2016-6828, CVE-2016-7039

Severity
critical
Lowest
Low
Medium
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Critical

October 11, 2016

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu kernel

Package Information

https://launchpad.net/ubuntu/+source/linux/3.13.0-98.145

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