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Ubuntu 14.04 LTS: 3053-1 Moderate: Multiple Kernel Issues and Threats

ubuntu
Calendar Grey August 10, 2016
Scroller Ubuntu
Numerous vulnerabilities in the kernel of Ubuntu 14.04 LTS necessitate prompt updates to safeguard against possible attacks.
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:

A missing permission check when settings ACLs was discovered in nfsd. A

local user could exploit this flaw to gain access to any file by setting an

ACL. (CVE-2016-1237)

It was discovered that the keyring implementation in the Linux kernel did

not ensure a data structure was initialized before referencing it after an

error condition occurred. A local attacker could use this to cause a denial

of service (system crash). (CVE-2016-4470)

Sasha Levin discovered that a use-after-free existed in the percpu

allocator in the Linux kernel. A local attacker could use this to cause a

denial of service (system crash) or possibly execute arbitrary code with

administrative privileges. (CVE-2016-4794)

Kangjie Lu discovered an information leak in the netlink implementation of

the Linux kernel. A local attacker could us...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory access control DoS threat system crash linux-lts-vivid

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.19.0-66-generic   3.19.0-66.74~14.04.1
  linux-image-3.19.0-66-generic-lpae  3.19.0-66.74~14.04.1
  linux-image-3.19.0-66-lowlatency  3.19.0-66.74~14.04.1
  linux-image-3.19.0-66-powerpc-e500mc  3.19.0-66.74~14.04.1
  linux-image-3.19.0-66-powerpc-smp  3.19.0-66.74~14.04.1
  linux-image-3.19.0-66-powerpc64-emb  3.19.0-66.74~14.04.1
  linux-image-3.19.0-66-powerpc64-smp  3.19.0-66.74~14.04.1

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-3053-1

CVE-2016-1237, CVE-2016-4470, CVE-2016-4794, CVE-2016-5243

Severity
important
Lowest
Low
Medium
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Critical

August 10, 2016

Topics%20covered

Topics Covered

security advisory access control DoS threat system crash linux-lts-vivid

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-vivid/3.19.0-66.74~14.04.1

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