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Ubuntu Security Notice USN-2665-1

Ubuntu Security Notice USN-2665-1
Posted Jul 7, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2665-1 - A race condition was discovered in the Linux kernel's file_handle size verification. A local user could exploit this flaw to read potentially sensitive memory locations. A underflow error was discovered in the Linux kernel's Ozmo Devices USB over WiFi host controller driver. A remote attacker could exploit this flaw to cause a denial of service (system crash) or potentially execute arbitrary code via a specially crafted packet. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2015-1420, CVE-2015-4001, CVE-2015-4002, CVE-2015-4003
MD5 | dc664107d152c7b55821628a6f04f559

Ubuntu Security Notice USN-2665-1

Change Mirror Download
============================================================================
Ubuntu Security Notice USN-2665-1
July 07, 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:

A race condition was discovered in the Linux kernel's file_handle size
verification. A local user could exploit this flaw to read potentially
sensative memory locations. (CVE-2015-1420)

A underflow error was discovered in the Linux kernel's Ozmo Devices USB
over WiFi host controller driver. A remote attacker could exploit this flaw
to cause a denial of service (system crash) or potentially execute
arbitrary code via a specially crafted packet. (CVE-2015-4001)

A bounds check error was discovered in the Linux kernel's Ozmo Devices USB
over WiFi host controller driver. A remote attacker could exploit this flaw
to cause a denial of service (system crash) or potentially execute
arbitrary code via a specially crafted packet. (CVE-2015-4002)

A division by zero error was discovered in the Linux kernel's Ozmo Devices
USB over WiFi host controller driver. A remote attacker could exploit this
flaw to cause a denial of service (system crash). (CVE-2015-4003)

Update instructions:

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

Ubuntu 14.04 LTS:
linux-image-3.19.0-22-generic 3.19.0-22.22~14.04.1
linux-image-3.19.0-22-generic-lpae 3.19.0-22.22~14.04.1
linux-image-3.19.0-22-lowlatency 3.19.0-22.22~14.04.1
linux-image-3.19.0-22-powerpc-e500mc 3.19.0-22.22~14.04.1
linux-image-3.19.0-22-powerpc-smp 3.19.0-22.22~14.04.1
linux-image-3.19.0-22-powerpc64-emb 3.19.0-22.22~14.04.1
linux-image-3.19.0-22-powerpc64-smp 3.19.0-22.22~14.04.1

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:
http://www.ubuntu.com/usn/usn-2665-1
CVE-2015-1420, CVE-2015-4001, CVE-2015-4002, CVE-2015-4003

Package Information:
https://launchpad.net/ubuntu/+source/linux-lts-vivid/3.19.0-22.22~14.04.1

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