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USN-2794-1: Linux kernel vulnerabilities

5 November 2015

Several security issues were fixed in the kernel.

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Releases

Packages

Details

It was discovered that in certain situations, a directory could be renamed
outside of a bind mounted location. An attacker could use this to escape
bind mount containment and gain access to sensitive information.
(CVE-2015-2925)

Moein Ghasemzadeh discovered that the USB WhiteHEAT serial driver contained
hardcoded attributes about the USB devices. An attacker could construct a
fake WhiteHEAT USB device that, when inserted, causes a denial of service
(system crash). (CVE-2015-5257)

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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. 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

Related notices

  • USN-2795-1: linux-lts-trusty, linux-image-3.13.0-67-generic-lpae, linux-image-3.13.0-67-generic
  • USN-2797-1: linux-image-3.16.0-52-lowlatency, linux-image-3.16.0-52-generic-lpae, linux-image-3.16.0-52-powerpc-e500mc, linux-image-extra-3.16.0-52-generic, linux-image-3.16.0-52-powerpc64-smp, linux-image-3.16.0-52-powerpc-smp, linux-image-3.16.0-52-powerpc64-emb, linux-lts-utopic, linux-image-3.16.0-52-generic
  • USN-2796-1: linux-ti-omap4, linux-image-3.2.0-1473-omap4
  • USN-2799-1: linux-image-3.19.0-32-powerpc-e500mc, linux-image-3.19.0-32-lowlatency, linux-image-3.19.0-32-powerpc-smp, linux-image-3.19.0-32-generic-lpae, linux-image-3.19.0-32-generic, linux, linux-image-3.19.0-32-powerpc64-emb, linux-image-3.19.0-32-powerpc64-smp
  • USN-2792-1: linux-image-3.2.0-93-powerpc-smp, linux, linux-image-3.2.0-93-powerpc64-smp, linux-image-3.2.0-93-virtual, linux-image-3.2.0-93-highbank, linux-image-3.2.0-93-omap, linux-image-3.2.0-93-generic-pae, linux-image-3.2.0-93-generic
  • USN-2798-1: linux-image-3.19.0-32-powerpc-e500mc, linux-lts-vivid, linux-image-3.19.0-32-lowlatency, linux-image-3.19.0-32-powerpc-smp, linux-image-3.19.0-32-generic-lpae, linux-image-extra-3.19.0-32-generic, linux-image-3.19.0-32-generic, linux-image-3.19.0-32-powerpc64-emb, linux-image-3.19.0-32-powerpc64-smp

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