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Ubuntu 14.04 LTS USN-3071-1 Critical: Kernel Security Issues

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Calendar Grey August 29, 2016
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Ubuntu 14.04 LTS received significant security updates aimed at fixing kernel vulnerabilities to enhance defenses against unauthorized access and exploits
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

Kangjie Lu discovered an information leak in the Reliable Datagram Sockets

(RDS) implementation in the Linux kernel. A local attacker could use this

to obtain potentially sensitive information from kernel memory.

(CVE-2016-5244)

Yue Cao et al discovered a flaw in the TCP implementation's handling of

challenge acks in the Linux kernel. A remote attacker could use this to

cause a denial of service (reset connection) or inject content into an TCP

stream. (CVE-2016-5696)

Pengfei Wang discovered a race condition in the MIC VOP driver in the Linux

kernel. A local attacker could use this to cause a denial of service

(system crash) or obtain potentially sensitive information from kernel

memory. (CVE-2016-5728)

Cyril Bur discovered that on PowerPC platforms, the Linux kernel mishandled

transactional memory state on exec(). A local attacker could use this to

cause a denial of service ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service information leak critical Ubuntu kernel system update

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.13.0-95-generic   3.13.0-95.142
  linux-image-3.13.0-95-generic-lpae  3.13.0-95.142
  linux-image-3.13.0-95-lowlatency  3.13.0-95.142
  linux-image-3.13.0-95-powerpc-e500  3.13.0-95.142
  linux-image-3.13.0-95-powerpc-e500mc  3.13.0-95.142
  linux-image-3.13.0-95-powerpc-smp  3.13.0-95.142
  linux-image-3.13.0-95-powerpc64-emb  3.13.0-95.142
  linux-image-3.13.0-95-powerpc64-smp  3.13.0-95.142

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-3071-1

CVE-2016-5244, CVE-2016-5696, CVE-2016-5728, CVE-2016-5828,

CVE-2016-5829

Severity
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Critical

August 29, 2016

Topics%20covered

Topics Covered

security advisory denial of service information leak critical Ubuntu kernel system update

Package Information

https://launchpad.net/ubuntu/+source/linux/3.13.0-95.142

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