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Ubuntu 16.04 LTS: USN-3099-3 Moderate: Linux Kernel Denial Of Service

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Calendar Grey October 11, 2016
Scroller Ubuntu
Security patches addressing several vulnerabilities in linux-raspi2, affecting Ubuntu 16.04 LTS, unveiled on October 11, 2016.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-raspi2: Linux kernel for Raspberry Pi 2

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 Adaptec AAC RAID controller

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

use this to cause a denial of service (system crash). (CVE-2016-6480)

Topics%20covered

Topics Covered

security advisory denial of service security issue system update ubuntu linux kernel raspberry pi

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.4.0-1027-raspi2   4.4.0-1027.33

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-3099-3

https://ubuntu.com/security/notices/USN-3099-1

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

Severity
important
Lowest
Low
Medium
High
Critical

October 11, 2016

Topics%20covered

Topics Covered

security advisory denial of service security issue system update ubuntu linux kernel raspberry pi

Package Information

https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1027.33

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