Ubuntu Security Notices
USN-2290-1

USN-2290-1: Linux kernel vulnerabilities

Publication date

17 July 2014

Overview

Several security issues were fixed in the kernel.

Releases

14.04 LTS

Packages

linux - Linux kernel

Details

Sasha Levin reported a flaw in the Linux kernel’s point-to-point protocol
(PPP) when used with the Layer Two Tunneling Protocol (L2TP). A local user
could exploit this flaw to gain administrative privileges. (CVE-2014-4943)

Salva Peiró discovered an information leak in the Linux kernel’s media-
device driver. A local attacker could exploit this flaw to obtain sensitive
information from kernel memory. (CVE-2014-1739)

A bounds check error was discovered in the socket filter subsystem of the
Linux kernel. A local user could exploit this flaw to cause a denial of
service (system crash) via crafted BPF instructions. (CVE-2014-3144)

A remainder calculation error was discovered in the socket filter subsystem
of the Linux kernel. A local user could exploit this flaw to cause a denial
of service (system crash) via crafted...

Salva Peiró discovered an information leak in the Linux kernel’s media-
device driver. A local attacker could exploit this flaw to obtain sensitive
information from kernel memory. (CVE-2014-1739)

A remainder calculation error was discovered in the socket filter subsystem
of the Linux kernel. A local user could exploit this flaw to cause a denial
of service (system crash) via crafted BPF instructions. (CVE-2014-3145)

A flaw was discovered in the Linux kernel’s handling of hugetlb entries. A
local user could exploit this flaw to cause a denial service (memory
corruption or system crash). (CVE-2014-3940)

Don Bailey and Ludvig Strigeus discovered an integer overflow in the Linux
kernel’s implementation of the LZ4 decompression algorithm, when used by
code not complying with API limitations. An attacker could exploit this
flaw to cause a denial of service (memory corruption) or possibly other
unspecified impact. (CVE-2014-4611)

Tuomas Räsänen reported the Linux kernel on certain Intel processors does
not properly initialize random seeds for network operations, causing TCP
sequence numbers, TCP and UDP port numbers and IP ID values to be
predictable. A remote attacker could exploit this flaw to spoof or disrupt
IP communication. (CVE-2014-7284)

Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

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.

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

Ubuntu Release	Package Version
14.04 trusty	linux-image-3.13.0-32-generic – 3.13.0-32.57
	linux-image-3.13.0-32-generic-lpae – 3.13.0-32.57
	linux-image-3.13.0-32-lowlatency – 3.13.0-32.57
	linux-image-3.13.0-32-powerpc-e500 – 3.13.0-32.57
	linux-image-3.13.0-32-powerpc-e500mc – 3.13.0-32.57
	linux-image-3.13.0-32-powerpc-smp – 3.13.0-32.57
	linux-image-3.13.0-32-powerpc64-emb – 3.13.0-32.57
	linux-image-3.13.0-32-powerpc64-smp – 3.13.0-32.57

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.

Get Ubuntu Pro

References

Have additional questions?

Talk to a member of the team ›