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Ubuntu 12.04 LTS USN-2792-1 Critical: Kernel Denial of Service Issues

ubuntu
Calendar Grey November 5, 2015
Scroller Ubuntu
Multiple critical vulnerabilities in the kernel of Ubuntu 12.04 LTS have been identified, necessitating urgent updates and system restarts to reduce potential threats.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

Dmitry Vyukov discovered that the Linux kernel did not properly initialize

IPC object state in certain situations. A local attacker could use this to

escalate their privileges, expose confidential information, or cause a

denial of service (system crash). (CVE-2015-7613)

It was discovered that the Linux kernel did not check if a new IPv6 MTU set

by a user space application was valid. A remote attacker could forge a

route advertisement with an invalid MTU that a user space daemon like

NetworkManager would honor and apply to the kernel, causing a denial of

service. (CVE-2015-0272)

It was discovered that in certain situations, a directory could be renamed

outside of a bind mounted location. An attacker could use this to escape

bind mount containment and gain access to sensitive information.

(CVE-2015-2925)

Moein Ghasemzadeh discovered that the USB WhiteHEAT serial driver contained

...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel update privilege escalation ubuntu

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-93-generic    3.2.0-93.133
  linux-image-3.2.0-93-generic-pae  3.2.0-93.133
  linux-image-3.2.0-93-highbank   3.2.0-93.133
  linux-image-3.2.0-93-omap       3.2.0-93.133
  linux-image-3.2.0-93-powerpc-smp  3.2.0-93.133
  linux-image-3.2.0-93-powerpc64-smp  3.2.0-93.133
  linux-image-3.2.0-93-virtual    3.2.0-93.133

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-2792-1

CVE-2015-0272, CVE-2015-2925, CVE-2015-5257, CVE-2015-7613

Severity
critical
Lowest
Low
Medium
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Critical

November 05, 2015

Topics%20covered

Topics Covered

security advisory denial of service kernel update privilege escalation ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux/3.2.0-93.133

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