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USN-3072-2: Linux kernel (OMAP4) vulnerabilities

29 August 2016

Several security issues were fixed in the kernel.




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.

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.

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.

Related notices

  • USN-3072-1: linux-image-3.2.0-109-virtual, linux-image-3.2.0-109-omap, linux-image-3.2.0-109-powerpc-smp, linux-image-3.2.0-109-powerpc64-smp, linux-image-3.2.0-109-highbank, linux, linux-image-3.2.0-109-generic, linux-image-3.2.0-109-generic-pae
  • USN-3070-1: linux-image-4.4.0-36-generic, linux-image-4.4.0-36-powerpc64-emb, linux-image-4.4.0-36-lowlatency, linux-image-extra-4.4.0-36-generic, linux-image-4.4.0-36-generic-lpae, linux-image-4.4.0-36-powerpc-smp, linux, linux-image-4.4.0-36-powerpc64-smp, linux-image-4.4.0-36-powerpc-e500mc
  • USN-3070-2: linux-image-4.4.0-1021-raspi2, linux-raspi2
  • USN-3071-1: linux-image-3.13.0-95-powerpc-e500mc, linux-image-extra-3.13.0-95-generic, linux-image-3.13.0-95-powerpc-smp, linux-image-3.13.0-95-generic-lpae, linux-image-3.13.0-95-generic, linux-image-3.13.0-95-lowlatency, linux, linux-image-3.13.0-95-powerpc64-smp, linux-image-3.13.0-95-powerpc-e500, linux-image-3.13.0-95-powerpc64-emb
  • USN-3071-2: linux-image-3.13.0-95-generic-lpae, linux-lts-trusty, linux-image-3.13.0-95-generic
  • USN-3070-3: linux-image-4.4.0-1024-snapdragon, linux-snapdragon
  • USN-3070-4: linux-image-4.4.0-36-generic, linux-image-4.4.0-36-powerpc64-emb, linux-lts-xenial, linux-image-4.4.0-36-lowlatency, linux-image-extra-4.4.0-36-generic, linux-image-4.4.0-36-generic-lpae, linux-image-4.4.0-36-powerpc-smp, linux-image-4.4.0-36-powerpc64-smp, linux-image-4.4.0-36-powerpc-e500mc