USN-2667-1: Linux kernel vulnerabilities

7 July 2015

linux vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 15.04

Summary

Several security issues were fixed in the kernel.

Software Description

  • linux - Linux kernel

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)

A double free flaw was discovered in the Linux kernel’s path lookup. A local user could cause a denial of service (Oops). (CVE-2015-5706)

Update instructions

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

Ubuntu 15.04
linux-image-3.19.0-22-generic - 3.19.0-22.22
linux-image-3.19.0-22-generic-lpae - 3.19.0-22.22
linux-image-3.19.0-22-lowlatency - 3.19.0-22.22
linux-image-3.19.0-22-powerpc-e500mc - 3.19.0-22.22
linux-image-3.19.0-22-powerpc-smp - 3.19.0-22.22
linux-image-3.19.0-22-powerpc64-emb - 3.19.0-22.22
linux-image-3.19.0-22-powerpc64-smp - 3.19.0-22.22

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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