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Ubuntu 15.04 USN-2829-1 Critical: Kernel Denial Of Service

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Calendar Grey December 4, 2015
Scroller Ubuntu
The latest Ubuntu security bulletin highlights significant kernel vulnerabilities, prompting users to apply necessary updates to safeguard their systems.
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 Ubuntu kernel update instructions system crash critical error

Update Instructions

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

Ubuntu 15.04:
  linux-image-3.19.0-39-generic   3.19.0-39.44
  linux-image-3.19.0-39-generic-lpae  3.19.0-39.44
  linux-image-3.19.0-39-lowlatency  3.19.0-39.44
  linux-image-3.19.0-39-powerpc-e500mc  3.19.0-39.44
  linux-image-3.19.0-39-powerpc-smp  3.19.0-39.44
  linux-image-3.19.0-39-powerpc64-emb  3.19.0-39.44
  linux-image-3.19.0-39-powerpc64-smp  3.19.0-39.44

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

CVE-2015-5283, CVE-2015-7872

Severity
critical
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Critical

December 04, 2015

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu kernel update instructions system crash critical error

Package Information

https://launchpad.net/ubuntu/+source/linux/3.19.0-39.44

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