USN-2017-1: Linux kernel vulnerabilities
8 November 2013
Several security issues were fixed in the kernel.
Releases
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.