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Ubuntu 12.04 LTS USN-2221-1 Critical: Kernel Flaws Cause DoS

ubuntu
Calendar Grey May 26, 2014
Scroller Ubuntu
Essential fixes resolve numerous vulnerabilities found in the Ubuntu 12.04 LTS kernel, impacting both local and remote users.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

Matthew Daley reported an information leak in the floppy disk driver of the

Linux kernel. An unprivileged local user could exploit this flaw to obtain

potentially sensitive information from kernel memory. (CVE-2014-1738)

Matthew Daley reported a flaw in the handling of ioctl commands by the

floppy disk driver in the Linux kernel. An unprivileged local user could

exploit this flaw to gain administrative privileges if the floppy disk

module is loaded. (CVE-2014-1737)

A flaw was discovered in the Linux kernel's IPC reference counting. An

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

service (OOM system crash). (CVE-2013-4483)

Al Viro discovered an error in how CIFS in the Linux kernel handles

uncached write operations. An unprivileged local user could exploit this

flaw to cause a denial of service (system crash), obtain sensitive

i...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory information leak DoS Ubuntu kernel administrative privileges CIFS error

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-63-generic    3.2.0-63.95
  linux-image-3.2.0-63-generic-pae  3.2.0-63.95
  linux-image-3.2.0-63-highbank   3.2.0-63.95
  linux-image-3.2.0-63-omap       3.2.0-63.95
  linux-image-3.2.0-63-powerpc-smp  3.2.0-63.95
  linux-image-3.2.0-63-powerpc64-smp  3.2.0-63.95
  linux-image-3.2.0-63-virtual    3.2.0-63.95

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-2221-1

CVE-2013-4483, CVE-2014-0069, CVE-2014-0077, CVE-2014-0101,

CVE-2014-1737, CVE-2014-1738, CVE-2014-2309, CVE-2014-2523,

CVE-2014-2672, CVE-2014-2678, CVE-2014-2706, CVE-2014-2851

Severity
critical
Lowest
Low
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Critical

May 26, 2014

Topics%20covered

Topics Covered

security advisory information leak DoS Ubuntu kernel administrative privileges CIFS error

Package Information

https://launchpad.net/ubuntu/+source/linux/3.2.0-63.95

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