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Ubuntu 14.04 LTS USN-2949-1 Moderate: Kernel DoS and Integrity Threats

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Calendar Grey April 6, 2016
Scroller Ubuntu
Explore recent patch notes for Linux kernel vulnerabilities affecting Ubuntu 14.04 LTS, with particular attention to resolutions for Denial-of-Service and integrity-related concerns.
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 for Trusty

Details:

Venkatesh Pottem discovered a use-after-free vulnerability in the Linux

kernel's CXGB3 driver. A local attacker could use this to cause a denial of

service (system crash) or possibly execute arbitrary code. (CVE-2015-8812)

Xiaofei Rex Guo discovered a timing side channel vulnerability in the Linux

Extended Verification Module (EVM). An attacker could use this to affect

system integrity. (CVE-2016-2085)

David Herrmann discovered that the Linux kernel incorrectly accounted file

descriptors to the original opener for in-flight file descriptors sent over

a unix domain socket. A local attacker could use this to cause a denial of

service (resource exhaustion). (CVE-2016-2550)

It was discovered that the Linux kernel did not enforce limits on the

amount of data allocated to buffer pipes. A local attacker could use this

to cause a d...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel system integrity ubuntu resource exhaustion

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.19.0-58-generic   3.19.0-58.64~14.04.1
  linux-image-3.19.0-58-generic-lpae  3.19.0-58.64~14.04.1
  linux-image-3.19.0-58-lowlatency  3.19.0-58.64~14.04.1
  linux-image-3.19.0-58-powerpc-e500mc  3.19.0-58.64~14.04.1
  linux-image-3.19.0-58-powerpc-smp  3.19.0-58.64~14.04.1
  linux-image-3.19.0-58-powerpc64-emb  3.19.0-58.64~14.04.1
  linux-image-3.19.0-58-powerpc64-smp  3.19.0-58.64~14.04.1

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.
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-2949-1

CVE-2015-8812, CVE-2016-2085, CVE-2016-2550, CVE-2016-2847

April 06, 2016

Topics%20covered

Topics Covered

security advisory denial of service kernel system integrity ubuntu resource exhaustion

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-vivid/3.19.0-58.64~14.04.1

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