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USN-2663-1: Linux kernel vulnerabilities

7 July 2015

Several security issues were fixed in the kernel.

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Releases

Packages

Details

Alexandre Oliva reported a race condition flaw in the btrfs file system's
handling of extended attributes (xattrs). A local attacker could exploit
this flaw to bypass ACLs and potentially escalate privileges.
(CVE-2014-9710)

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)

Carl H Lunde discovered missing consistency checks in the Linux kernel's UDF
file system (CONFIG_UDF_FS). A local attacker could exploit this flaw to
cause a denial of service (system crash) by using a corrupted file system
image. (CVE-2015-4167)

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

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

Ubuntu 14.04

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

Related notices

  • USN-2616-1: linux-image-3.16.0-38-powerpc-smp, linux-image-3.16.0-38-powerpc-e500mc, linux-image-3.16.0-38-powerpc64-emb, linux, linux-image-3.16.0-38-generic-lpae, linux-image-3.16.0-38-powerpc64-smp, linux-image-3.16.0-38-generic, linux-image-3.16.0-38-lowlatency
  • USN-2615-1: linux-image-3.16.0-38-powerpc-smp, linux-image-3.16.0-38-powerpc-e500mc, linux-image-3.16.0-38-powerpc64-emb, linux-lts-utopic, linux-image-3.16.0-38-generic-lpae, linux-image-3.16.0-38-powerpc64-smp, linux-image-3.16.0-38-generic, linux-image-extra-3.16.0-38-generic, linux-image-3.16.0-38-lowlatency
  • USN-2662-1: linux-image-3.13.0-57-generic-lpae, linux-image-3.13.0-57-generic, linux-lts-trusty
  • USN-2660-1: linux-image-3.2.0-87-generic, linux-image-3.2.0-87-generic-pae, linux-image-3.2.0-87-powerpc64-smp, linux, linux-image-3.2.0-87-virtual, linux-image-3.2.0-87-powerpc-smp, linux-image-3.2.0-87-omap, linux-image-3.2.0-87-highbank
  • USN-2661-1: linux-ti-omap4, linux-image-3.2.0-1467-omap4
  • USN-2666-1: linux, linux-image-3.16.0-43-powerpc-smp, linux-image-3.16.0-43-generic, linux-image-3.16.0-43-powerpc64-smp, linux-image-3.16.0-43-powerpc-e500mc, linux-image-3.16.0-43-lowlatency, linux-image-3.16.0-43-generic-lpae, linux-image-3.16.0-43-powerpc64-emb
  • USN-2664-1: linux-lts-utopic, linux-image-3.16.0-43-powerpc-smp, linux-image-3.16.0-43-generic, linux-image-3.16.0-43-powerpc64-smp, linux-image-3.16.0-43-powerpc-e500mc, linux-image-3.16.0-43-lowlatency, linux-image-extra-3.16.0-43-generic, linux-image-3.16.0-43-generic-lpae, linux-image-3.16.0-43-powerpc64-emb
  • USN-2667-1: linux-image-3.19.0-22-powerpc-smp, linux, linux-image-3.19.0-22-powerpc64-emb, linux-image-3.19.0-22-generic, linux-image-3.19.0-22-generic-lpae, linux-image-3.19.0-22-powerpc64-smp, linux-image-3.19.0-22-powerpc-e500mc, linux-image-3.19.0-22-lowlatency
  • USN-2665-1: linux-image-3.19.0-22-powerpc-smp, linux-image-3.19.0-22-powerpc64-emb, linux-image-3.19.0-22-generic, linux-image-3.19.0-22-generic-lpae, linux-image-3.19.0-22-powerpc64-smp, linux-lts-vivid, linux-image-extra-3.19.0-22-generic, linux-image-3.19.0-22-powerpc-e500mc, linux-image-3.19.0-22-lowlatency
  • USN-2631-1: linux-image-3.2.0-85-powerpc64-smp, linux-image-3.2.0-85-omap, linux-image-3.2.0-85-generic-pae, linux-image-3.2.0-85-virtual, linux, linux-image-3.2.0-85-generic, linux-image-3.2.0-85-powerpc-smp, linux-image-3.2.0-85-highbank
  • USN-2632-1: linux-image-3.2.0-1465-omap4, linux-ti-omap4

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Further reading