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Ubuntu 12.04 LTS: 1768-1 Critical: Linux Kernel Denial Of Service

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Calendar Grey March 18, 2013
Scroller Ubuntu
Numerous vulnerabilities have been resolved within the Linux kernel for users of Ubuntu. It is crucial to upgrade your system without delay to reduce potential threats.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-lts-quantal: Linux hardware enablement kernel from Quantal

Details:

Andrew Cooper of Citrix reported a Xen stack corruption in the Linux

kernel. An unprivileged user in a 32bit PVOPS guest can cause the guest

kernel to crash, or operate erroneously. (CVE-2013-0190)

A failure to validate input was discovered in the Linux kernel's Xen

netback (network backend) driver. A user in a guest OS may exploit this

flaw to cause a denial of service to the guest OS and other guest domains.

(CVE-2013-0216)

A memory leak was discovered in the Linux kernel's Xen netback (network

backend) driver. A user in a guest OS could trigger this flaw to cause a

denial of service on the system. (CVE-2013-0217)

A flaw was discovered in the Linux kernel Xen PCI backend driver. If a PCI

device is assigned to the guest OS, the guest OS could exploit this flaw to

cause a denial of service on the host. (CVE-...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical system update ubuntu linux kernel

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.5.0-26-generic    3.5.0-26.42~precise1

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-1768-1

CVE-2013-0190, CVE-2013-0216, CVE-2013-0217, CVE-2013-0231,

CVE-2013-0268, CVE-2013-0290, CVE-2013-0311, CVE-2013-0313,

CVE-2013-0349

Severity
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Critical

March 18, 2013

Topics%20covered

Topics Covered

security advisory denial of service critical system update ubuntu linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-quantal/3.5.0-26.42~precise1

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