=========================================================================Ubuntu Security Notice USN-2636-1
June 10, 2015

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

- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux-lts-vivid: Linux hardware enablement kernel from Vivid

Details:

Xiong Zhou discovered a bug in the way the EXT4 filesystem handles
fallocate zero range functionality when the page size is greater than the
block size. A local attacker could exploit this flaw to cause a denial of
service (system crash). (CVE-2015-0275)

Wen Xu discovered a use-after-free flaw in the Linux kernel's ipv4 ping
support. A local user could exploit this flaw to cause a denial of service
(system crash) or gain administrative privileges on the system.
(CVE-2015-3636)

A memory corruption flaw was discovered in the Linux kernel's scsi
subsystem. A local attacker could potentially exploit this flaw to cause a
denial of service (system crash). (CVE-2015-4036)

Update instructions:

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

Ubuntu 14.04 LTS:
  linux-image-3.19.0-20-generic   3.19.0-20.20~14.04.1
  linux-image-3.19.0-20-generic-lpae  3.19.0-20.20~14.04.1
  linux-image-3.19.0-20-lowlatency  3.19.0-20.20~14.04.1
  linux-image-3.19.0-20-powerpc-e500mc  3.19.0-20.20~14.04.1
  linux-image-3.19.0-20-powerpc-smp  3.19.0-20.20~14.04.1
  linux-image-3.19.0-20-powerpc64-emb  3.19.0-20.20~14.04.1
  linux-image-3.19.0-20-powerpc64-smp  3.19.0-20.20~14.04.1

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-2636-1
  CVE-2015-0275, CVE-2015-3636, CVE-2015-4036

Package Information:
  https://launchpad.net/ubuntu/+source/linux-lts-vivid/3.19.0-20.20~14.04.1


Ubuntu 2636-1: Linux kernel (Vivid HWE) vulnerabilities

June 10, 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 14.04 LTS: linux-image-3.19.0-20-generic 3.19.0-20.20~14.04.1 linux-image-3.19.0-20-generic-lpae 3.19.0-20.20~14.04.1 linux-image-3.19.0-20-lowlatency 3.19.0-20.20~14.04.1 linux-image-3.19.0-20-powerpc-e500mc 3.19.0-20.20~14.04.1 linux-image-3.19.0-20-powerpc-smp 3.19.0-20.20~14.04.1 linux-image-3.19.0-20-powerpc64-emb 3.19.0-20.20~14.04.1 linux-image-3.19.0-20-powerpc64-smp 3.19.0-20.20~14.04.1 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-2636-1

CVE-2015-0275, CVE-2015-3636, CVE-2015-4036

Severity
June 10, 2015

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-vivid/3.19.0-20.20~14.04.1

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