Your submission was sent successfully! Close

Thank you for contacting us. A member of our team will be in touch shortly. Close

You have successfully unsubscribed! Close

Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team.Close

USN-3070-4: Linux kernel (Xenial HWE) vulnerabilities

30 August 2016

Several security issues were fixed in the kernel.

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

Releases

Packages

Details

USN-3070-1 fixed vulnerabilities in the Linux kernel for Ubuntu
16.04 LTS. This update provides the corresponding updates for the
Linux Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for
Ubuntu 14.04 LTS.

A missing permission check when settings ACLs was discovered in nfsd. A
local user could exploit this flaw to gain access to any file by setting an
ACL. (CVE-2016-1237)

Kangjie Lu discovered an information leak in the Reliable Datagram Sockets
(RDS) implementation in the Linux kernel. A local attacker could use this
to obtain potentially sensitive information from kernel memory.
(CVE-2016-5244)

James Patrick-Evans discovered that the airspy USB device driver in the
Linux kernel did not properly handle certain error conditions. An attacker
with physical access could use this to cause a denial of service (memory
consumption). (CVE-2016-5400)

Yue Cao et al discovered a flaw in the TCP implementation's handling of
challenge acks in the Linux kernel. A remote attacker could use this to
cause a denial of service (reset connection) or inject content into an TCP
stream. (CVE-2016-5696)

Pengfei Wang discovered a race condition in the MIC VOP driver in the Linux
kernel. A local attacker could use this to cause a denial of service
(system crash) or obtain potentially sensitive information from kernel
memory. (CVE-2016-5728)

Cyril Bur discovered that on PowerPC platforms, the Linux kernel mishandled
transactional memory state on exec(). A local attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2016-5828)

It was discovered that a heap based buffer overflow existed in the USB HID
driver in the Linux kernel. A local attacker could use this cause a denial
of service (system crash) or possibly execute arbitrary code.
(CVE-2016-5829)

It was discovered that the OverlayFS implementation in the Linux kernel did
not properly verify dentry state before proceeding with unlink and rename
operations. A local attacker could use this to cause a denial of service
(system crash). (CVE-2016-6197)

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 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.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

Related notices

  • USN-3070-1: linux-image-4.4.0-36-powerpc-e500mc, linux-image-4.4.0-36-generic-lpae, linux-image-4.4.0-36-powerpc64-smp, linux-image-extra-4.4.0-36-generic, linux-image-4.4.0-36-lowlatency, linux-image-4.4.0-36-powerpc64-emb, linux-image-4.4.0-36-generic, linux-image-4.4.0-36-powerpc-smp, linux
  • USN-3070-2: linux-raspi2, linux-image-4.4.0-1021-raspi2
  • USN-3053-1: linux-image-3.19.0-66-lowlatency, linux-image-extra-3.19.0-66-generic, linux-image-3.19.0-66-generic, linux-image-3.19.0-66-powerpc64-emb, linux-image-3.19.0-66-powerpc-smp, linux-lts-vivid, linux-image-3.19.0-66-generic-lpae, linux-image-3.19.0-66-powerpc64-smp, linux-image-3.19.0-66-powerpc-e500mc
  • USN-3070-3: linux-snapdragon, linux-image-4.4.0-1024-snapdragon
  • USN-3072-2: linux-ti-omap4, linux-image-3.2.0-1487-omap4
  • USN-3072-1: linux-image-3.2.0-109-generic-pae, linux-image-3.2.0-109-powerpc-smp, linux-image-3.2.0-109-virtual, linux-image-3.2.0-109-generic, linux-image-3.2.0-109-highbank, linux-image-3.2.0-109-powerpc64-smp, linux, linux-image-3.2.0-109-omap
  • USN-3071-1: linux-image-3.13.0-95-generic-lpae, linux-image-3.13.0-95-powerpc-e500, linux-image-3.13.0-95-powerpc-smp, linux-image-3.13.0-95-powerpc64-emb, linux-image-3.13.0-95-powerpc-e500mc, linux-image-3.13.0-95-generic, linux, linux-image-extra-3.13.0-95-generic, linux-image-3.13.0-95-lowlatency, linux-image-3.13.0-95-powerpc64-smp
  • USN-3071-2: linux-image-3.13.0-95-generic, linux-image-3.13.0-95-generic-lpae, linux-lts-trusty

Join the discussion

Need help with your security needs?

Ubuntu Pro provides up to ten-year security coverage for over 23,000 open-source packages within the Ubuntu Main and Universe repositories.

Talk to an expert to find out what would work best for you

Further reading