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Ubuntu 17.10 USN-3677-1 Critical: Kernel Security Issues Fixed

ubuntu
Calendar Grey June 12, 2018
Dist Ubuntu Esm H88
Explore weaknesses within the Linux kernel that affect Ubuntu 17.10, along with essential security updates in USN-3677-1.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

- linux-raspi2: Linux kernel for Raspberry Pi 2

Details:

It was discovered that the netfilter subsystem of the Linux kernel did not

properly validate ebtables offsets. A local attacker could use this to

cause a denial of service (system crash) or possibly execute arbitrary

code. (CVE-2018-1068)

Wen Xu discovered that the ext4 filesystem implementation in the Linux

kernel did not properly handle corrupted meta data in some situations. An

attacker could use this to specially craft an ext4 file system that caused

a denial of service (system crash) when mounted. (CVE-2018-1092)

It was discovered that a NULL pointer dereference existed in the RDS

(Reliable Datagram Sockets) protocol implementation in the Linux kernel. A

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

(CVE-2018-7492)

It was discovered that the 802.11 software simulator implementation in the

...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service code execution memory leak kernel system update ubuntu

Update Instructions

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

Ubuntu 17.10:
  linux-image-4.13.0-1022-raspi2  4.13.0-1022.23
  linux-image-4.13.0-45-generic   4.13.0-45.50
  linux-image-4.13.0-45-generic-lpae  4.13.0-45.50
  linux-image-4.13.0-45-lowlatency  4.13.0-45.50
  linux-image-generic             4.13.0.45.48
  linux-image-generic-lpae        4.13.0.45.48
  linux-image-lowlatency          4.13.0.45.48
  linux-image-raspi2              4.13.0.1022.20

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-3677-1

CVE-2018-1068, CVE-2018-1092, CVE-2018-7492, CVE-2018-8087,

CVE-2018-8781

Severity
critical
Lowest
Low
Medium
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Critical

June 11, 2018

Topics%20covered

Topics Covered

security advisory denial of service code execution memory leak kernel system update ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux/4.13.0-45.50
https://launchpad.net/ubuntu/+source/linux-raspi2/4.13.0-1022.23

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