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Ubuntu 16.04 LTS: USN-3006-1 Critical: Multiple Kernel Issues

ubuntu
Calendar Grey June 10, 2016
Scroller Ubuntu
Several kernel vulnerabilities rectified in Ubuntu's June 2016 update, addressing potential denial of service threats and concerns regarding information exposure.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

Justin Yackoski discovered that the Atheros L2 Ethernet Driver in the Linux

kernel incorrectly enables scatter/gather I/O. A remote attacker could use

this to obtain potentially sensitive information from kernel memory.

(CVE-2016-2117)

Jann Horn discovered that eCryptfs improperly attempted to use the mmap()

handler of a lower filesystem that did not implement one, causing a

recursive page fault to occur. A local unprivileged attacker could use to

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

with administrative privileges. (CVE-2016-1583)

Multiple race conditions where discovered in the Linux kernel's ext4 file

system. A local user could exploit this flaw to cause a denial of service

(disk corruption) by writing to a page that is associated with a different

users file after unsynchronized hole punching and page-fault handli...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical issue information leak kernel patch system update ubuntu

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.4.0-24-generic    4.4.0-24.43
  linux-image-4.4.0-24-generic-lpae  4.4.0-24.43
  linux-image-4.4.0-24-lowlatency  4.4.0-24.43
  linux-image-4.4.0-24-powerpc-e500mc  4.4.0-24.43
  linux-image-4.4.0-24-powerpc-smp  4.4.0-24.43
  linux-image-4.4.0-24-powerpc64-emb  4.4.0-24.43
  linux-image-4.4.0-24-powerpc64-smp  4.4.0-24.43

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-3006-1

CVE-2015-8839, CVE-2016-1583, CVE-2016-2117, CVE-2016-2187,

CVE-2016-3961, CVE-2016-4485, CVE-2016-4486, CVE-2016-4558,

CVE-2016-4565, CVE-2016-4581

Severity
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Critical

June 10, 2016

Topics%20covered

Topics Covered

security advisory denial of service critical issue information leak kernel patch system update ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux/4.4.0-24.43

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