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USN-3072-1: Linux kernel vulnerabilities

29 August 2016

Several security issues were fixed in the kernel.

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Details

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)

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)

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)

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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.

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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.
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-3072-2: linux-ti-omap4, linux-image-3.2.0-1487-omap4
  • 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-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
  • USN-3070-3: linux-snapdragon, linux-image-4.4.0-1024-snapdragon
  • USN-3070-4: 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-lts-xenial, 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-image-extra-4.4.0-36-generic

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