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Ubuntu 14.04 LTS USN-2887-1 Medium Severity: DoS Attack and Data Leak

ubuntu
Calendar Grey February 2, 2016
Scroller Ubuntu
Multiple vulnerabilities addressed in Ubuntu 14.04 LTS kernels may result in Denial of Service and data leaks. Immediate patching is recommended.
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 a use-after-free vulnerability existed in the

AF_UNIX implementation in the Linux kernel. A local attacker could use

crafted epoll_ctl calls to cause a denial of service (system crash) or

expose sensitive information. (CVE-2013-7446)

It was discovered that the KVM implementation in the Linux kernel did not

properly restore the values of the Programmable Interrupt Timer (PIT). A

user-assisted attacker in a KVM guest could cause a denial of service in

the host (system crash). (CVE-2015-7513)

Sasha Levin discovered that the Reliable Datagram Sockets (RDS)

implementation in the Linux kernel had a race condition when checking

whether a socket was bound or not. A local attacker could use this to cause

a denial of service (system crash). (CVE-2015-7990)

It was discovered that the Btrfs implementation in the Linux kernel

incorrectly handled compressed inline e...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel update information exposure ubuntu system crash

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.13.0-77-generic   3.13.0-77.121
  linux-image-3.13.0-77-generic-lpae  3.13.0-77.121
  linux-image-3.13.0-77-lowlatency  3.13.0-77.121
  linux-image-3.13.0-77-powerpc-e500  3.13.0-77.121
  linux-image-3.13.0-77-powerpc-e500mc  3.13.0-77.121
  linux-image-3.13.0-77-powerpc-smp  3.13.0-77.121
  linux-image-3.13.0-77-powerpc64-emb  3.13.0-77.121
  linux-image-3.13.0-77-powerpc64-smp  3.13.0-77.121

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-2887-1

CVE-2013-7446, CVE-2015-7513, CVE-2015-7990, CVE-2015-8374

Severity
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Low
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February 02, 2016

Topics%20covered

Topics Covered

security advisory denial of service kernel update information exposure ubuntu system crash

Package Information

https://launchpad.net/ubuntu/+source/linux/3.13.0-77.121

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