USN-2544-1: Linux kernel vulnerabilities

24 March 2015

Several security issues were fixed in the kernel.

Releases

Packages

Details

Eric Windisch discovered flaw in how the Linux kernel's XFS file system
replaces remote attributes. A local access with access to an XFS file
system could exploit this flaw to escalate their privileges.
(CVE-2015-0274)

A flaw was discovered in the automatic loading of modules in the crypto
subsystem of the Linux kernel. A local user could exploit this flaw to load
installed kernel modules, increasing the attack surface and potentially
using this to gain administrative privileges. (CVE-2013-7421)

The Linux kernel's splice system call did not correctly validate its
parameters. A local, unprivileged user could exploit this flaw to cause a
denial of service (system crash). (CVE-2014-7822)

A flaw was discovered in the crypto subsystem when screening module names
for automatic module loading if the name contained a valid crypto module
name, eg. vfat(aes). A local user could exploit this flaw to load installed
kernel modules, increasing the attack surface and potentially using this to
gain administrative privileges. (CVE-2014-9644)

Carl H Lunde discovered that the UDF file system (CONFIG_UDF_FS) failed to
verify symlink size info. A local attacker, who is able to mount a malicous
UDF file system image, could exploit this flaw to cause a denial of service
(system crash) or possibly cause other undesired behaviors. (CVE-2014-9728)

Carl H Lunde discovered that the UDF file system (CONFIG_UDF_FS) did not
valid inode size information . A local attacker, who is able to mount a
malicous UDF file system image, could exploit this flaw to cause a denial
of service (system crash) or possibly cause other undesired behaviors.
(CVE-2014-9729)

Carl H Lunde discovered that the UDF file system (CONFIG_UDF_FS) did not
correctly verify the component length for symlinks. A local attacker, who
is able to mount a malicous UDF file system image, could exploit this flaw
to cause a denial of service (system crash) or possibly cause other
undesired behaviors. (CVE-2014-9730)

Carl H Lunde discovered an information leak in the UDF file system
(CONFIG_UDF_FS). A local attacker, who is able to mount a malicous UDF file
system image, could exploit this flaw to read potential sensitve kernel
memory. (CVE-2014-9731)

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.

Related notices

  • USN-2518-1: linux-image-3.16.0-31-generic, linux-image-3.16.0-31-powerpc64-emb, linux-image-3.16.0-31-powerpc-e500mc, linux-image-3.16.0-31-lowlatency, linux-image-3.16.0-31-generic-lpae, linux-image-3.16.0-31-powerpc-smp, linux-image-3.16.0-31-powerpc64-smp, linux
  • USN-2513-1: linux-image-3.2.0-77-omap, linux-image-3.2.0-77-powerpc-smp, linux-image-3.2.0-77-generic, linux-image-3.2.0-77-highbank, linux-image-3.2.0-77-virtual, linux, linux-image-3.2.0-77-generic-pae, linux-image-3.2.0-77-powerpc64-smp
  • USN-2545-1: linux-image-3.16.0-33-generic-lpae, linux-image-3.16.0-33-powerpc-smp, linux-image-3.16.0-33-generic, linux-lts-utopic, linux-image-3.16.0-33-powerpc64-smp, linux-image-3.16.0-33-powerpc64-emb, linux-image-3.16.0-33-powerpc-e500mc, linux-image-3.16.0-33-lowlatency
  • USN-2514-1: linux-image-3.2.0-1460-omap4, linux-ti-omap4
  • USN-2543-1: linux-image-3.13.0-48-generic-lpae, linux-image-3.13.0-48-generic, linux-lts-trusty
  • USN-2541-1: linux-image-3.2.0-79-generic-pae, linux-image-3.2.0-79-virtual, linux-image-3.2.0-79-powerpc-smp, linux-image-3.2.0-79-generic, linux, linux-image-3.2.0-79-highbank, linux-image-3.2.0-79-omap, linux-image-3.2.0-79-powerpc64-smp
  • USN-2542-1: linux-image-3.2.0-1461-omap4, linux-ti-omap4
  • USN-2517-1: linux-image-3.16.0-31-generic, linux-image-3.16.0-31-powerpc64-emb, linux-image-3.16.0-31-powerpc-e500mc, linux-image-3.16.0-31-lowlatency, linux-image-3.16.0-31-generic-lpae, linux-image-3.16.0-31-powerpc-smp, linux-lts-utopic, linux-image-3.16.0-31-powerpc64-smp
  • USN-2546-1: linux-image-3.16.0-33-generic-lpae, linux-image-3.16.0-33-powerpc-smp, linux-image-3.16.0-33-generic, linux-image-3.16.0-33-powerpc64-smp, linux-image-3.16.0-33-powerpc-e500mc, linux-image-3.16.0-33-powerpc64-emb, linux, linux-image-3.16.0-33-lowlatency