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Alerts This Week
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Ubuntu 13.10 USN-2241-1 Critical: Kernel Flaws Cause System Crashes

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Calendar Grey June 5, 2014
Scroller Ubuntu
An advisory for Ubuntu outlines multiple vulnerabilities in the kernel that could lead to possible system instabilities and elevated privileges.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

Pinkie Pie discovered a flaw in the Linux kernel's futex subsystem. An

unprivileged local user could exploit this flaw to cause a denial of

service (system crash) or gain administrative privileges. (CVE-2014-3153)

A flaw was discovered in the Linux kernel virtual machine's (kvm)

validation of interrupt requests (irq). A guest OS user could exploit this

flaw to cause a denial of service (host OS crash). (CVE-2014-0155)

An information leak was discovered in the netfilter subsystem of the Linux

kernel. An attacker could exploit this flaw to obtain sensitive information

from kernel memory. (CVE-2014-2568)

Sasha Levin reported a bug in the Linux kernel's virtual memory management

subsystem. An unprivileged local user could exploit this flaw to cause a

denial of service (system crash). (CVE-2014-3122)

Topics%20covered

Topics Covered

security advisory denial of service privilege escalation Ubuntu system crash security issues kernel flaws

Update Instructions

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

Ubuntu 13.10:
  linux-image-3.11.0-23-generic   3.11.0-23.40
  linux-image-3.11.0-23-generic-lpae  3.11.0-23.40

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-2241-1

CVE-2014-0155, CVE-2014-2568, CVE-2014-3122, CVE-2014-3153

Severity
critical
Lowest
Low
Medium
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Critical

June 05, 2014

Topics%20covered

Topics Covered

security advisory denial of service privilege escalation Ubuntu system crash security issues kernel flaws

Package Information

https://launchpad.net/ubuntu/+source/linux/3.11.0-23.40

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