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Ubuntu 14.04 LTS USN-2823-1 Critical: Kernel Denial Of Service

ubuntu
Calendar Grey December 1, 2015
Scroller Ubuntu
Multiple kernel vulnerabilities addressed in Ubuntu version 14.04 LTS. Essential system upgrades needed for vital security enhancements and improved stability.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

It was discovered that the SCTP protocol implementation in the Linux kernel

performed an incorrect sequence of protocol-initialization steps. A local

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

(CVE-2015-5283)

Dmitry Vyukov discovered that the Linux kernel's keyring handler attempted

to garbage collect incompletely instantiated keys. A local unprivileged

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

(CVE-2015-7872)

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu kernel system update flaws

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.13.0-71-generic   3.13.0-71.114
  linux-image-3.13.0-71-generic-lpae  3.13.0-71.114
  linux-image-3.13.0-71-lowlatency  3.13.0-71.114
  linux-image-3.13.0-71-powerpc-e500  3.13.0-71.114
  linux-image-3.13.0-71-powerpc-e500mc  3.13.0-71.114
  linux-image-3.13.0-71-powerpc-smp  3.13.0-71.114
  linux-image-3.13.0-71-powerpc64-emb  3.13.0-71.114
  linux-image-3.13.0-71-powerpc64-smp  3.13.0-71.114

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

https://ubuntu.com/security/notices/USN-2823-1

CVE-2015-5283, CVE-2015-7872

Severity
critical
Lowest
Low
Medium
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Critical

December 01, 2015

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu kernel system update flaws

Package Information

https://launchpad.net/ubuntu/+source/linux/3.13.0-71.114

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