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Ubuntu 14.04 LTS: USN-2829-2 Moderate: Kernel Denial Of Service Issues

ubuntu
Calendar Grey December 4, 2015
Scroller Ubuntu
Multiple vulnerabilities were addressed in the Linux kernel for Ubuntu, necessitating updates to ensure system reliability and security.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-lts-vivid: Linux hardware enablement kernel from Vivid

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 moderate denial of service ubuntu kernel issues

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.19.0-39-generic   3.19.0-39.44~14.04.1
  linux-image-3.19.0-39-generic-lpae  3.19.0-39.44~14.04.1
  linux-image-3.19.0-39-lowlatency  3.19.0-39.44~14.04.1
  linux-image-3.19.0-39-powerpc-e500mc  3.19.0-39.44~14.04.1
  linux-image-3.19.0-39-powerpc-smp  3.19.0-39.44~14.04.1
  linux-image-3.19.0-39-powerpc64-emb  3.19.0-39.44~14.04.1
  linux-image-3.19.0-39-powerpc64-smp  3.19.0-39.44~14.04.1

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-2829-2

CVE-2015-5283, CVE-2015-7872

December 04, 2015

Topics%20covered

Topics Covered

security advisory moderate denial of service ubuntu kernel issues

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-vivid/3.19.0-39.44~14.04.1

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