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Ubuntu 11.10: USN-1778-1 Critical: Linux Kernel OMAP4 Security Issues

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Calendar Grey March 22, 2013
Scroller Ubuntu
Essential enhancements for Ubuntu's linux-ti-omap4 kernel have been introduced to bolster system protection and reduce vulnerabilities.
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:

Andrew Jones discovered a flaw with the xen_iret function in Linux kernel's

Xen virtualizeation. In the 32-bit Xen paravirt platform an unprivileged

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

the system) or gain guest OS privilege. (CVE-2013-0228)

A flaw was reported in the permission checks done by the Linux kernel for

/dev/cpu/*/msr. A local root user with all capabilities dropped could

exploit this flaw to execute code with full root capabilities.

(CVE-2013-0268)

A flaw was discovered in the Linux kernel's vhost driver used to accelerate

guest networking in KVM based virtual machines. A privileged guest user

could exploit this flaw to crash the host system. (CVE-2013-0311)

An information leak was discovered in the Linux kernel's Bluetooth stack

when HIDP (Human Interface Device Protocol) support is e...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service information leak kernel update root privileges ubuntu linux kernel

Update Instructions

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

Ubuntu 11.10:
  linux-image-3.0.0-1222-omap4    3.0.0-1222.36

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-1778-1

CVE-2013-0228, CVE-2013-0268, CVE-2013-0311, CVE-2013-0349,

CVE-2013-1773

Severity
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March 22, 2013

Topics%20covered

Topics Covered

security advisory denial of service information leak kernel update root privileges ubuntu linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-ti-omap4/3.0.0-1222.36

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