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Ubuntu 12.04 LTS USN-1880-1 Critical: Kernel Info Leak Threats

ubuntu
Calendar Grey June 14, 2013
Scroller Ubuntu
Addresses a variety of kernel vulnerabilities in Ubuntu 12.04 LTS, notably including serious data exposure risks and potential denial of service 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:

An information leak was discovered in the Linux kernel when inotify is used

to monitor the /dev/ptmx device. A local user could exploit this flaw to

discover keystroke timing and potentially discover sensitive information

like password length. (CVE-2013-0160)

An information leak was discovered in the Linux kernel's tkill and tgkill

system calls when used from compat processes. A local user could exploit

this flaw to examine potentially sensitive kernel memory. (CVE-2013-2141)

A flaw was discovered in the Linux kernel's perf events subsystem for Intel

Sandy Bridge and Ivy Bridge processors. A local user could exploit this

flaw to cause a denial of service (system crash). (CVE-2013-2146)

An information leak was discovered in the Linux kernel's crypto API. A

local user could exploit this flaw to examine potentia...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service information leak update critical kernel ubuntu

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.5.0-34-generic    3.5.0-34.55~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-1880-1

CVE-2013-0160, CVE-2013-2141, CVE-2013-2146, CVE-2013-3076,

CVE-2013-3222, CVE-2013-3223, CVE-2013-3224, CVE-2013-3225,

CVE-2013-3227, CVE-2013-3228, CVE-2013-3229, CVE-2013-3230,

CVE-2013-3231, CVE-2013-3232, CVE-2013-3233, CVE-2013-3234,

CVE-2013-3235

Severity
critical
Lowest
Low
Medium
High
Critical

June 14, 2013

Topics%20covered

Topics Covered

security advisory denial of service information leak update critical kernel ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-quantal/3.5.0-34.55~precise1

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