1. Ubuntu Security Notices
  2. USN-3338-1

USN-3338-1: Linux kernel vulnerabilities

Publication date

21 June 2017

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

Details

It was discovered that the stack guard page for processes in the Linux
kernel was not sufficiently large enough to prevent overlapping with the
heap. An attacker could leverage this with another vulnerability to execute
arbitrary code and gain administrative privileges (CVE-2017-1000364)

Jesse Hertz and Tim Newsham discovered that the Linux netfilter
implementation did not correctly perform validation when handling 32 bit
compatibility IPT_SO_SET_REPLACE events on 64 bit platforms. A local
unprivileged attacker could use this to cause a denial of service (system
crash) or execute arbitrary code with administrative privileges.
(CVE-2016-4997)

It was discovered that the stack guard page for processes in the Linux
kernel was not sufficiently large enough to prevent overlapping with the
heap. An attacker could leverage this with another vulnerability to execute
arbitrary code and gain administrative privileges (CVE-2017-1000364)

Jesse Hertz and Tim Newsham discovered that the Linux netfilter
implementation did not correctly perform validation when handling 32 bit
compatibility IPT_SO_SET_REPLACE events on 64 bit platforms. A local
unprivileged attacker could use this to cause a denial of service (system
crash) or execute arbitrary code with administrative privileges.
(CVE-2016-4997)

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. 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.

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

Ubuntu Release Package Version
12.04 precise linux-image-powerpc-smp –  3.2.0.128.142
linux-image-3.2.0-128-virtual –  3.2.0-128.173
linux-image-3.2.0-128-generic-pae –  3.2.0-128.173
linux-image-generic –  3.2.0.128.142
linux-image-generic-pae –  3.2.0.128.142
linux-image-highbank –  3.2.0.128.142
linux-image-3.2.0-128-generic –  3.2.0-128.173
linux-image-3.2.0-128-powerpc-smp –  3.2.0-128.173
linux-image-virtual –  3.2.0.128.142
linux-image-powerpc64-smp –  3.2.0.128.142
linux-image-3.2.0-128-omap –  3.2.0-128.173
linux-image-3.2.0-128-powerpc64-smp –  3.2.0-128.173
linux-image-omap –  3.2.0.128.142
linux-image-3.2.0-128-highbank –  3.2.0-128.173

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References

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