USN-2541-1: Linux kernel vulnerabilities

Releases

• Ubuntu 12.04

Packages

• linux - Linux kernel

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)

Update instructions

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

Ubuntu 12.04

• linux-image-3.2.0-79-omap - 3.2.0-79.115
• linux-image-3.2.0-79-generic - 3.2.0-79.115
• linux-image-3.2.0-79-powerpc-smp - 3.2.0-79.115
• linux-image-3.2.0-79-powerpc64-smp - 3.2.0-79.115
• linux-image-3.2.0-79-virtual - 3.2.0-79.115
• linux-image-3.2.0-79-generic-pae - 3.2.0-79.115
• linux-image-3.2.0-79-highbank - 3.2.0-79.115

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-2014-7822
• CVE-2014-9419
• CVE-2014-9683
• CVE-2014-9728
• CVE-2014-9729
• CVE-2014-9730
• CVE-2014-9731
• CVE-2015-1421

Related notices

• USN-2543-1: linux-lts-trusty, linux-image-3.13.0-48-generic, linux-image-3.13.0-48-generic-lpae
• USN-2544-1: linux-image-3.13.0-48-powerpc64-emb, linux-image-3.13.0-48-powerpc-smp, linux-image-3.13.0-48-generic, linux-image-3.13.0-48-powerpc64-smp, linux-image-3.13.0-48-generic-lpae, linux-image-extra-3.13.0-48-generic, linux-image-3.13.0-48-powerpc-e500, linux-image-3.13.0-48-powerpc-e500mc, linux-image-3.13.0-48-lowlatency, linux
• USN-2542-1: linux-image-3.2.0-1461-omap4, linux-ti-omap4
• USN-2515-1: linux-image-3.13.0-46-generic-lpae, linux-image-3.13.0-46-generic, linux-lts-trusty
• USN-2516-1: linux-image-3.13.0-46-powerpc-e500, linux-image-3.13.0-46-powerpc-e500mc, linux-image-3.13.0-46-lowlatency, linux-image-3.13.0-46-powerpc-smp, linux-image-3.13.0-46-generic-lpae, linux-image-3.13.0-46-powerpc64-emb, linux-image-3.13.0-46-powerpc64-smp, linux-image-extra-3.13.0-46-generic, linux-image-3.13.0-46-generic, linux
• USN-2517-1: linux-image-extra-3.16.0-31-generic, linux-image-3.16.0-31-powerpc-smp, 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-powerpc64-emb, linux-image-3.16.0-31-powerpc64-smp, linux-image-3.16.0-31-generic, linux-lts-utopic
• USN-2518-1: linux-image-3.16.0-31-powerpc-smp, 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-powerpc64-emb, linux-image-3.16.0-31-powerpc64-smp, linux-image-3.16.0-31-generic, linux
• USN-2545-1: linux-image-extra-3.16.0-33-generic, linux-image-3.16.0-33-powerpc64-smp, linux-image-3.16.0-33-powerpc64-emb, linux-image-3.16.0-33-generic-lpae, linux-image-3.16.0-33-powerpc-smp, linux-image-3.16.0-33-lowlatency, linux-lts-utopic, linux-image-3.16.0-33-powerpc-e500mc, linux-image-3.16.0-33-generic
• USN-2546-1: linux-image-3.16.0-33-powerpc64-smp, linux-image-3.16.0-33-powerpc64-emb, linux-image-3.16.0-33-generic-lpae, linux-image-3.16.0-33-powerpc-smp, linux-image-3.16.0-33-lowlatency, linux, linux-image-3.16.0-33-powerpc-e500mc, linux-image-3.16.0-33-generic
• USN-2563-1: linux-image-3.13.0-49-lowlatency, linux-image-3.13.0-49-powerpc-e500, linux-image-extra-3.13.0-49-generic, linux-image-3.13.0-49-generic-lpae, linux-image-3.13.0-49-powerpc64-smp, linux-image-3.13.0-49-generic, linux-image-3.13.0-49-powerpc64-emb, linux-image-3.13.0-49-powerpc-smp, linux, linux-image-3.13.0-49-powerpc-e500mc
• USN-2562-1: linux-lts-trusty, linux-image-3.13.0-49-generic, linux-image-3.13.0-49-generic-lpae