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Ubuntu 12.04 LTS USN-3127-2 Critical: Kernel Denial Of Service

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Calendar Grey November 11, 2016
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Critical notifications regarding Linux kernel security flaws in Ubuntu Trusty have emerged, highlighting solutions for denial of service vulnerabilities.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise

Details:

USN-3127-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04

LTS. This update provides the corresponding updates for the Linux

Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu

12.04 LTS.

It was discovered that the compression handling code in the Advanced Linux

Sound Architecture (ALSA) subsystem in the Linux kernel did not properly

check for an integer overflow. A local attacker could use this to cause a

denial of service (system crash). (CVE-2014-9904)

Kirill A. Shutemov discovered that memory manager in the Linux kernel did

not properly handle anonymous pages. A local attacker could use this to

cause a denial of service or possibly gain administrative privileges.

(CVE-2015-3288)

Vitaly Kuznetsov discovered that the Linux kernel did not properly suppress

hugetlbfs support in X86 paravirtualize...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical issue kernel system update ubuntu

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.13.0-101-generic  3.13.0-101.148~precise1
  linux-image-3.13.0-101-generic-lpae  3.13.0-101.148~precise1
  linux-image-generic-lpae-lts-trusty  3.13.0.101.92
  linux-image-generic-lts-trusty  3.13.0.101.92

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-3127-2

https://ubuntu.com/security/notices/USN-3127-1

CVE-2014-9904, CVE-2015-3288, CVE-2016-3961, CVE-2016-7042

Severity
critical
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Critical

November 11, 2016

Topics%20covered

Topics Covered

security advisory denial of service critical issue kernel system update ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-trusty/3.13.0-101.148~precise1

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