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Ubuntu 16.10 USN-3170-2 Critical: Kernel Denial of Service Advisory

ubuntu
Calendar Grey January 11, 2017
Scroller Ubuntu
Numerous vulnerabilities addressed in the linux-raspi2 kernel for Ubuntu. Ensure your system is updated for enhanced security and performance. More information available.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-raspi2: Linux kernel for Raspberry Pi 2

Details:

Andrey Konovalov discovered that the ipv6 icmp implementation in the Linux

kernel did not properly check data structures on send. A remote attacker

could use this to cause a denial of service (system crash). (CVE-2016-9919)

Andrey Konovalov discovered that signed integer overflows existed in the

setsockopt() system call when handling the SO_SNDBUFFORCE and

SO_RCVBUFFORCE options. A local attacker with the CAP_NET_ADMIN capability

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

corruption). (CVE-2016-9793)

Topics%20covered

Topics Covered

security advisory denial of service kernel ubuntu system crash raspberry pi linux image

Update Instructions

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

Ubuntu 16.10:
  linux-image-4.8.0-1022-raspi2   4.8.0-1022.25
  linux-image-raspi2              4.8.0.1022.25

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-3170-2

https://ubuntu.com/security/notices/USN-3170-1

CVE-2016-9793, CVE-2016-9919

Severity
critical
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Low
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Critical

January 11, 2017

Topics%20covered

Topics Covered

security advisory denial of service kernel ubuntu system crash raspberry pi linux image

Package Information

https://launchpad.net/ubuntu/+source/linux-raspi2/4.8.0-1022.25

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