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Ubuntu 16.04: USN-3752-2 Moderate DoS Threats in Kernel

ubuntu
Calendar Grey August 24, 2018
Dist Ubuntu Esm H88
=========================================================================Ubuntu Security Notice USN-
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-hwe: Linux hardware enablement (HWE) kernel

Details:

USN-3752-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04

LTS. This update provides the corresponding updates for the Linux

Hardware Enablement (HWE) kernel from Ubuntu 18.04 LTS for Ubuntu

16.04 LTS.

It was discovered that, when attempting to handle an out-of-memory

situation, a null pointer dereference could be triggered in the Linux

kernel in some circumstances. A local attacker could use this to cause a

denial of service (system crash). (CVE-2018-1000200)

Wen Xu discovered that the XFS filesystem implementation in the Linux

kernel did not properly validate meta-data information. An attacker could

use this to construct a malicious xfs image that, when mounted, could cause

a denial of service (system crash). (CVE-2018-10323)

Wen Xu discovered that the XFS filesystem implementation in the Linux

kernel did not properly validate...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory moderate denial of service ubuntu system crash security issues linux kernel

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.15.0-33-generic   4.15.0-33.36~16.04.1
  linux-image-4.15.0-33-generic-lpae  4.15.0-33.36~16.04.1
  linux-image-4.15.0-33-lowlatency  4.15.0-33.36~16.04.1
  linux-image-generic-hwe-16.04   4.15.0.33.55
  linux-image-generic-lpae-hwe-16.04  4.15.0.33.55
  linux-image-lowlatency-hwe-16.04  4.15.0.33.55

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-3752-2

https://ubuntu.com/security/notices/USN-3752-1

CVE-2018-1000200, CVE-2018-1000204, CVE-2018-10323, CVE-2018-10840,

CVE-2018-10881, CVE-2018-1093, CVE-2018-1108, CVE-2018-1120,

CVE-2018-11412, CVE-2018-11506, CVE-2018-12232, CVE-2018-12233,

CVE-2018-12904, CVE-2018-13094, CVE-2018-13405, CVE-2018-13406,

CVE-2018-5814, CVE-2018-9415

Severity
important
Lowest
Low
Medium
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Critical

August 24, 2018

Topics%20covered

Topics Covered

security advisory moderate denial of service ubuntu system crash security issues linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-33.36~16.04.1

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