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Ubuntu 12.04 LTS USN-1943-1 Critical: Kernel Security Issues Resolved

ubuntu
Calendar Grey September 6, 2013
Scroller Ubuntu
Essential patches for Ubuntu 12.04 LTS released to resolve various kernel vulnerabilities, greatly improving overall system protection.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-lts-raring: Linux hardware enablement kernel from Raring

Details:

Vasily Kulikov discovered a flaw in the Linux Kernel's perf tool that

allows for privilege escalation. A local user could exploit this flaw to

run commands as root when using the perf tool. (CVE-2013-1060)

A flaw was discovered in the Xen subsystem of the Linux kernel when it

provides read-only access to a disk that supports TRIM or SCSI UNMAP to a

guest OS. A privileged user in the guest OS could exploit this flaw to

destroy data on the disk, even though the guest OS should not be able to

write to the disk. (CVE-2013-2140)

A flaw was discovered in the Linux kernel when an IPv6 socket is used to

connect to an IPv4 destination. An unprivileged local user could exploit

this flaw to cause a denial of service (system crash). (CVE-2013-2232)

An information leak was discovered in the IPSec key_socket implementation

...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical privilege escalation kernel system update ubuntu

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.8.0-30-generic    3.8.0-30.44~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-1943-1

CVE-2013-1060, CVE-2013-2140, CVE-2013-2232, CVE-2013-2234,

CVE-2013-4162, CVE-2013-4163

Severity
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Critical

September 06, 2013

Topics%20covered

Topics Covered

security advisory denial of service critical privilege escalation kernel system update ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-raring/3.8.0-30.44~precise1

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