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Ubuntu 16.04 LTS: USN-3057-1 Moderate: Kernel SnapDragn DoS Issues

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Calendar Grey August 10, 2016
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Several vulnerabilities resolved in Ubuntu's Linux kernel designated for Snapdragon chipsets, accompanied by detailed update guidelines.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-snapdragon: Linux kernel for Snapdragon Processors

Details:

Ben Hawkes discovered an integer overflow in the Linux netfilter

implementation. On systems running 32 bit kernels, a local unprivileged

attacker could use this to cause a denial of service (system crash) or

possibly execute arbitrary code with administrative privileges.

(CVE-2016-3135)

It was discovered that the keyring implementation in the Linux kernel did

not ensure a data structure was initialized before referencing it after an

error condition occurred. A local attacker could use this to cause a denial

of service (system crash). (CVE-2016-4470)

Sasha Levin discovered that a use-after-free existed in the percpu

allocator in the Linux kernel. A local attacker could use this to cause a

denial of service (system crash) or possibly execute arbitrary code with

administrative privileges. (CVE-2016-4794)

Kangjie Lu di...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service security fix kernel ubuntu snapdragon safety update

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.4.0-1022-snapdragon  4.4.0-1022.25

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

https://ubuntu.com/security/notices/USN-3057-1

CVE-2016-3135, CVE-2016-4470, CVE-2016-4794, CVE-2016-5243

August 10, 2016

Topics%20covered

Topics Covered

security advisory denial of service security fix kernel ubuntu snapdragon safety update

Package Information

https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1022.25

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