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Ubuntu 14.04 LTS: USN-2274-2 Critical: Linux Kernel Security Flaw

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Calendar Grey July 5, 2014
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Protect your Ubuntu system from critical kernel vulnerabilities that can cause crashes or unauthorized access by following these key steps to update and reboot your system
The system could be made to crash or run programs as an administrator.

Summary

The system could be made to crash or run programs as an administrator.

Software Description:

- linux: Linux kernel

Details:

Andy Lutomirski discovered a flaw with the Linux kernel's ptrace syscall on

x86_64 processors. An attacker could exploit this flaw to cause a denial of

service (System Crash) or potential gain administrative privileges.

Topics%20covered

Topics Covered

security advisory denial of service critical ubuntu system crash administrative access linux kernel

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.13.0-30-generic   3.13.0-30.55
  linux-image-3.13.0-30-generic-lpae  3.13.0-30.55
  linux-image-3.13.0-30-lowlatency  3.13.0-30.55
  linux-image-3.13.0-30-powerpc-e500  3.13.0-30.55
  linux-image-3.13.0-30-powerpc-e500mc  3.13.0-30.55
  linux-image-3.13.0-30-powerpc-smp  3.13.0-30.55
  linux-image-3.13.0-30-powerpc64-emb  3.13.0-30.55
  linux-image-3.13.0-30-powerpc64-smp  3.13.0-30.55

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. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

References

https://ubuntu.com/security/notices/USN-2274-1

CVE-2014-4699

Severity
critical
Lowest
Low
Medium
High
Critical

July 05, 2014

Topics%20covered

Topics Covered

security advisory denial of service critical ubuntu system crash administrative access linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux/3.13.0-30.55

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