Overly broad permissions can turn one compromised account into a much larger security problem. Learn how to reduce unnecessary access, review privileges, and apply least privilege across modern Linux systems. Review Linux Privileges×

Alerts This Week
Warning Icon 1 461
Alerts This Week
Warning Icon 1 461

Ubuntu 14.04 LTS USN-3127-1 Critical: Linux Kernel DoS Issues

ubuntu
Calendar Grey November 11, 2016
Scroller Ubuntu
=========================================================================Ubuntu Security Notice USN-
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

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 paravirtualized guests. An attacker in the guest

OS could cause a denial of service (guest system crash). (CVE-2016-3961)

Ondrej Kozina discovered that the keyring interface in the Linux kernel

contained a buffer overflow when displaying timeout events via the

/proc/keys interface....

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu critical threat kernel fix system update Linux kernel

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.13.0-101-generic  3.13.0-101.148
  linux-image-3.13.0-101-generic-lpae  3.13.0-101.148
  linux-image-3.13.0-101-lowlatency  3.13.0-101.148
  linux-image-3.13.0-101-powerpc-e500  3.13.0-101.148
  linux-image-3.13.0-101-powerpc-e500mc  3.13.0-101.148
  linux-image-3.13.0-101-powerpc-smp  3.13.0-101.148
  linux-image-3.13.0-101-powerpc64-emb  3.13.0-101.148
  linux-image-3.13.0-101-powerpc64-smp  3.13.0-101.148
  linux-image-generic             3.13.0.101.109
  linux-image-generic-lpae        3.13.0.101.109
  linux-image-lowlatency          3.13.0.101.109
  linux-image-powerpc-e500        3.13.0.101.109
  linux-image-powerpc-e500mc      3.13.0.101.109
  linux-image-powerpc-smp         3.13.0.101.109
  linux-image-powerpc64-emb       3.13.0.101.109
  linux-image-powerpc64-smp       3.13.0.101.109
  linux-image-virtual             3.13.0.101.109

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-3127-1

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

Severity
critical
Lowest
Low
Medium
High
Critical

November 11, 2016

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu critical threat kernel fix system update Linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux/3.13.0-101.148

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.