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Ubuntu 12.04 LTS: USN-2886-1 High: Kernel Denial of Service

ubuntu
Calendar Grey February 1, 2016
Scroller Ubuntu
Investigate the most recent Ubuntu security notification concerning kernel weaknesses and vital updates to ensure user safety.
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 a use-after-free vulnerability existed in the

AF_UNIX implementation in the Linux kernel. A local attacker could use

crafted epoll_ctl calls to cause a denial of service (system crash) or

expose sensitive information. (CVE-2013-7446)

It was discovered that the KVM implementation in the Linux kernel did not

properly restore the values of the Programmable Interrupt Timer (PIT). A

user-assisted attacker in a KVM guest could cause a denial of service in

the host (system crash). (CVE-2015-7513)

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)

Sasha Levin discovered that the Reliable Datagram Sockets (RDS)

implementation in the Linux kern...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory Ubuntu update instructions Denial of Service kernel issue system crash sensitive information

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-98-generic    3.2.0-98.138
  linux-image-3.2.0-98-generic-pae  3.2.0-98.138
  linux-image-3.2.0-98-highbank   3.2.0-98.138
  linux-image-3.2.0-98-omap       3.2.0-98.138
  linux-image-3.2.0-98-powerpc-smp  3.2.0-98.138
  linux-image-3.2.0-98-powerpc64-smp  3.2.0-98.138
  linux-image-3.2.0-98-virtual    3.2.0-98.138

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-2886-1

CVE-2013-7446, CVE-2015-7513, CVE-2015-7799, CVE-2015-7990,

CVE-2015-8374, CVE-2015-8543, CVE-2015-8569, CVE-2015-8575,

CVE-2015-8785

February 01, 2016

Topics%20covered

Topics Covered

security advisory Ubuntu update instructions Denial of Service kernel issue system crash sensitive information

Package Information

https://launchpad.net/ubuntu/+source/linux/3.2.0-98.138

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