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 1 464
Alerts This Week
Warning Icon 1 464

Ubuntu 20.04 LTS: USN-4601-1 Important: Kernel Memory Leak Vulnerability

ubuntu
Calendar Grey December 17, 2015
Scroller Ubuntu
Critical flaws found in the Linux kernel of Ubuntu 14.04 LTS necessitate prompt security patches to prevent potential system failures.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

Jan Beulich discovered that the KVM svm hypervisor implementation in the

Linux kernel did not properly catch Debug exceptions on AMD processors. An

attacker in a guest virtual machine could use this to cause a denial of

service (system crash) in the host OS. (CVE-2015-8104)

郭永刚 discovered that the ppp implementation in the Linux kernel did

not ensure that certain slot numbers are valid. A local attacker with the

privilege to call ioctl() on /dev/ppp could cause a denial of service

(system crash). (CVE-2015-7799)

It was discovered that the driver for Digi Neo and ClassicBoard devices did

not properly initialize data structures. A local attacker could use this to

obtain sensitive information from the kernel. (CVE-2015-7885)

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu critical severity kernel issue

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.13.0-73-generic   3.13.0-73.116
  linux-image-3.13.0-73-generic-lpae  3.13.0-73.116
  linux-image-3.13.0-73-lowlatency  3.13.0-73.116
  linux-image-3.13.0-73-powerpc-e500  3.13.0-73.116
  linux-image-3.13.0-73-powerpc-e500mc  3.13.0-73.116
  linux-image-3.13.0-73-powerpc-smp  3.13.0-73.116
  linux-image-3.13.0-73-powerpc64-emb  3.13.0-73.116
  linux-image-3.13.0-73-powerpc64-smp  3.13.0-73.116

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. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

References

https://ubuntu.com/security/notices/USN-2841-1

CVE-2015-7799, CVE-2015-7885, CVE-2015-8104

Severity
important
Lowest
Low
Medium
High
Critical

December 17, 2015

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu critical severity kernel issue

Package Information

https://launchpad.net/ubuntu/+source/linux/3.13.0-73.116

Get the latest News and Insights

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