=========================================================================Ubuntu Security Notice USN-2465-1
January 13, 2015

linux-lts-trusty vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 LTS

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux-lts-trusty: Linux hardware enablement kernel from Trusty

Details:

A null pointer dereference flaw was discovered in the the Linux kernel's
SCTP implementation when ASCONF is used. A remote attacker could exploit
this flaw to cause a denial of service (system crash) via a malformed INIT
chunk. (CVE-2014-7841)

A race condition with MMIO and PIO transactions in the KVM (Kernel Virtual
Machine) subsystem of the Linux kernel was discovered. A guest OS user
could exploit this flaw to cause a denial of service (guest OS crash) via a
specially crafted application. (CVE-2014-7842)

Miloš Prchlík reported a flaw in how the ARM64 platform handles a single
byte overflow in __clear_user. A local user could exploit this flaw to
cause a denial of service (system crash) by reading one byte beyond a
/dev/zero page boundary. (CVE-2014-7843)

A stack buffer overflow was discovered in the ioctl command handling for
the Technotrend/Hauppauge USB DEC devices driver. A local user could
exploit this flaw to cause a denial of service (system crash) or possibly
gain privileges. (CVE-2014-8884)

Update instructions:

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

Ubuntu 12.04 LTS:
  linux-image-3.13.0-44-generic   3.13.0-44.73~precise1
  linux-image-3.13.0-44-generic-lpae  3.13.0-44.73~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://www.ubuntu.com/usn/usn-2465-1
  CVE-2014-7841, CVE-2014-7842, CVE-2014-7843, CVE-2014-8884

Package Information:
  https://launchpad.net/ubuntu/+source/linux-lts-trusty/3.13.0-44.73~precise1


Ubuntu 2465-1: Linux kernel (Trusty HWE) vulnerabilities

January 13, 2015
Several security issues were fixed in the kernel.

Summary

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 12.04 LTS: linux-image-3.13.0-44-generic 3.13.0-44.73~precise1 linux-image-3.13.0-44-generic-lpae 3.13.0-44.73~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://www.ubuntu.com/usn/usn-2465-1

CVE-2014-7841, CVE-2014-7842, CVE-2014-7843, CVE-2014-8884

Severity
January 13, 2015

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-trusty/3.13.0-44.73~precise1