USN-2017-1: Linux kernel vulnerabilities

Releases

• Ubuntu 12.04

Packages

• linux - Linux kernel

Details

A denial of service flaw was discovered in the Btrfs file system in the
Linux kernel. A local user could cause a denial of service by creating a
large number of files with names that have the same CRC32 hash value.
(CVE-2012-5374)

A denial of service flaw was discovered in the Btrfs file system in the
Linux kernel. A local user could cause a denial of service (prevent file
creation) for a victim, by creating a file with a specific CRC32C hash
value in a directory important to the victim. (CVE-2012-5375)

Dan Carpenter discovered an information leak in the HP Smart Array and
Compaq SMART2 disk-array driver in the Linux kernel. A local user could
exploit this flaw to obtain sensitive information from kernel memory.
(CVE-2013-2147)

Update instructions

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

Ubuntu 12.04

• linux-image-3.2.0-56-generic-pae - 3.2.0-56.86
• linux-image-3.2.0-56-omap - 3.2.0-56.86
• linux-image-3.2.0-56-powerpc-smp - 3.2.0-56.86
• linux-image-3.2.0-56-powerpc64-smp - 3.2.0-56.86
• linux-image-3.2.0-56-generic - 3.2.0-56.86
• linux-image-3.2.0-56-highbank - 3.2.0-56.86
• linux-image-3.2.0-56-virtual - 3.2.0-56.86

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

• CVE-2012-5374
• CVE-2012-5375
• CVE-2013-2147

Related notices

• USN-1947-1: linux-image-3.5.0-40-generic, linux-lts-quantal
• USN-1946-1: linux-ti-omap4, linux-image-3.5.0-232-omap4
• USN-2018-1: linux-image-3.2.0-1440-omap4, linux-ti-omap4
• USN-1944-1: linux-image-3.5.0-40-omap, linux-image-3.5.0-40-generic, linux-image-3.5.0-40-highbank, linux-image-3.5.0-40-powerpc-smp, linux-image-3.5.0-40-powerpc64-smp, linux
• USN-1945-1: linux-ti-omap4, linux-image-3.5.0-232-omap4
• USN-2023-1: linux-image-3.8.0-33-generic, linux
• USN-2020-1: linux-lts-raring, linux-image-3.8.0-33-generic
• USN-1999-1: linux-image-3.5.0-234-omap4, linux-ti-omap4
• USN-1994-1: linux-image-3.5.0-42-generic, linux-lts-quantal
• USN-1996-1: linux-image-3.5.0-42-powerpc-smp, linux-image-3.5.0-42-generic, linux-image-3.5.0-42-highbank, linux-image-3.5.0-42-powerpc64-smp, linux, linux-image-3.5.0-42-omap
• USN-2016-1: linux-ec2, linux-image-2.6.32-358-ec2
• USN-2015-1: linux-image-2.6.32-53-386, linux-image-2.6.32-53-lpia, linux-image-2.6.32-53-server, linux-image-2.6.32-53-powerpc64-smp, linux-image-2.6.32-53-versatile, linux-image-2.6.32-53-powerpc-smp, linux-image-2.6.32-53-powerpc, linux-image-2.6.32-53-virtual, linux-image-2.6.32-53-generic-pae, linux-image-2.6.32-53-preempt, linux-image-2.6.32-53-sparc64, linux, linux-image-2.6.32-53-sparc64-smp, linux-image-2.6.32-53-ia64, linux-image-2.6.32-53-generic
• USN-2050-1: linux-ti-omap4, linux-image-3.5.0-236-omap4
• USN-1997-1: linux-image-3.5.0-234-omap4, linux-ti-omap4