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Ubuntu 12.04 LTS USN-2464-1: Administrative Threats in Kernel

ubuntu
Calendar Grey January 13, 2015
Dist Ubuntu Esm H88
Numerous security flaws have been resolved in the linux-ti-omap4 kernel for Ubuntu, improving protective measures.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-ti-omap4: Linux kernel for OMAP4

Details:

Andy Lutomirski discovered that the Linux kernel does not properly handle

faults associated with the Stack Segment (SS) register in the x86

architecture. A local attacker could exploit this flaw to gain

administrative privileges. (CVE-2014-9322)

An information leak in the Linux kernel was discovered that could leak the

high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine

(KVM) paravirt guests. A user in the guest OS could exploit this leak to

obtain information that could potentially be used to aid in attacking the

kernel. (CVE-2014-8134)

A race condition with MMIO and PIO transactions in the KVM (Kernel Virtual

Machine) subsystem of the Linux kernel was discovered. A guest OS user

could exploit this flaw to cause a denial of service (guest OS crash) via a

specially crafted application. (CVE-2014-7842)

The KVM (...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service ubuntu linux-ti-omap4 administrative privileges

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-1458-omap4    3.2.0-1458.78

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-2464-1

CVE-2014-7842, CVE-2014-8134, CVE-2014-8369, CVE-2014-9090,

CVE-2014-9322

Severity
important
Lowest
Low
Medium
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Critical

January 13, 2015

Topics%20covered

Topics Covered

security advisory denial of service ubuntu linux-ti-omap4 administrative privileges

Package Information

https://launchpad.net/ubuntu/+source/linux-ti-omap4/3.2.0-1458.78

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