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USN-2542-1: Linux kernel (OMAP4) vulnerabilities

24 March 2015

Several security issues were fixed in the kernel.

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Releases

Packages

Details

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 how Thread Local Storage (TLS) is handled by the
task switching function in the Linux kernel for x86_64 based machines. A
local user could exploit this flaw to bypass the Address Space Layout
Radomization (ASLR) protection mechanism. (CVE-2014-9419)

Dmitry Chernenkov discovered a buffer overflow in eCryptfs' encrypted file
name decoding. A local unprivileged user could exploit this flaw to cause a
denial of service (system crash) or potentially gain administrative
privileges. (CVE-2014-9683)

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)

Sun Baoliang discovered a use after free flaw in the Linux kernel's SCTP
(Stream Control Transmission Protocol) subsystem during INIT collisions. A
remote attacker could exploit this flaw to cause a denial of service
(system crash) or potentially escalate their privileges on the system.
(CVE-2015-1421)

Reduce your security exposure

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.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 12.04

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-2543-1: linux-image-3.13.0-48-generic, linux-image-3.13.0-48-generic-lpae, linux-lts-trusty
  • USN-2544-1: linux, linux-image-3.13.0-48-powerpc64-emb, linux-image-3.13.0-48-generic, linux-image-3.13.0-48-powerpc-e500, linux-image-3.13.0-48-powerpc64-smp, linux-image-3.13.0-48-lowlatency, linux-image-3.13.0-48-powerpc-e500mc, linux-image-extra-3.13.0-48-generic, linux-image-3.13.0-48-generic-lpae, linux-image-3.13.0-48-powerpc-smp
  • USN-2541-1: linux, linux-image-3.2.0-79-generic-pae, linux-image-3.2.0-79-omap, linux-image-3.2.0-79-powerpc-smp, linux-image-3.2.0-79-virtual, linux-image-3.2.0-79-powerpc64-smp, linux-image-3.2.0-79-generic, linux-image-3.2.0-79-highbank
  • USN-2515-1: linux-image-3.13.0-46-generic-lpae, linux-lts-trusty, linux-image-3.13.0-46-generic
  • USN-2516-1: linux, linux-image-3.13.0-46-lowlatency, linux-image-3.13.0-46-powerpc-e500, linux-image-3.13.0-46-powerpc64-emb, linux-image-3.13.0-46-powerpc-smp, linux-image-3.13.0-46-powerpc-e500mc, linux-image-3.13.0-46-generic-lpae, linux-image-3.13.0-46-generic, linux-image-extra-3.13.0-46-generic, linux-image-3.13.0-46-powerpc64-smp
  • USN-2517-1: linux-image-3.16.0-31-powerpc-e500mc, linux-image-3.16.0-31-generic-lpae, linux-image-3.16.0-31-generic, linux-lts-utopic, linux-image-3.16.0-31-powerpc64-smp, linux-image-3.16.0-31-powerpc-smp, linux-image-extra-3.16.0-31-generic, linux-image-3.16.0-31-powerpc64-emb, linux-image-3.16.0-31-lowlatency
  • USN-2518-1: linux, linux-image-3.16.0-31-generic-lpae, linux-image-3.16.0-31-powerpc-e500mc, linux-image-3.16.0-31-generic, linux-image-3.16.0-31-powerpc64-smp, linux-image-3.16.0-31-powerpc-smp, linux-image-3.16.0-31-powerpc64-emb, linux-image-3.16.0-31-lowlatency
  • USN-2545-1: linux-lts-utopic, linux-image-3.16.0-33-generic, linux-image-3.16.0-33-powerpc64-emb, linux-image-3.16.0-33-powerpc64-smp, linux-image-3.16.0-33-powerpc-smp, linux-image-3.16.0-33-powerpc-e500mc, linux-image-extra-3.16.0-33-generic, linux-image-3.16.0-33-generic-lpae, linux-image-3.16.0-33-lowlatency
  • USN-2546-1: linux, linux-image-3.16.0-33-generic, linux-image-3.16.0-33-powerpc64-emb, linux-image-3.16.0-33-powerpc64-smp, linux-image-3.16.0-33-powerpc-smp, linux-image-3.16.0-33-powerpc-e500mc, linux-image-3.16.0-33-generic-lpae, linux-image-3.16.0-33-lowlatency
  • USN-2563-1: linux, linux-image-3.13.0-49-powerpc64-emb, linux-image-3.13.0-49-powerpc-smp, linux-image-3.13.0-49-generic-lpae, linux-image-3.13.0-49-lowlatency, linux-image-extra-3.13.0-49-generic, linux-image-3.13.0-49-generic, linux-image-3.13.0-49-powerpc-e500, linux-image-3.13.0-49-powerpc64-smp, linux-image-3.13.0-49-powerpc-e500mc
  • USN-2562-1: linux-image-3.13.0-49-generic, linux-lts-trusty, linux-image-3.13.0-49-generic-lpae