Executive Summary

Summary
Title Linux kernel regression
Informations
Name USN-2640-2 First vendor Publication 2015-06-21
Vendor Ubuntu Last vendor Modification 2015-06-21
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score Not Defined Attack Range Not Defined
Cvss Impact Score Not Defined Attack Complexity Not Defined
Cvss Expoit Score Not Defined Authentication Not Defined
Calculate full CVSS 2.0 Vectors scores

Detail

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 LTS

Summary:

The system could be made to crash under certain conditions.

Software Description: - linux: Linux kernel

Details:

The Fix for CVE-2015-1328 introduced a regression into the Linux kernel's overlayfs file system. The removal of a directory that only exists on the lower layer results in a kernel panic.

We apologize for the inconvenience.

Original advisory details:

Philip Pettersson discovered a privilege escalation when using overlayfs
mounts inside of user namespaces. A local user could exploit this flaw to
gain administrative privileges on the system.

Update instructions:

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

Ubuntu 12.04 LTS:
linux-image-3.2.0-86-generic 3.2.0-86.124
linux-image-3.2.0-86-generic-pae 3.2.0-86.124
linux-image-3.2.0-86-highbank 3.2.0-86.124
linux-image-3.2.0-86-omap 3.2.0-86.124
linux-image-3.2.0-86-powerpc-smp 3.2.0-86.124
linux-image-3.2.0-86-powerpc64-smp 3.2.0-86.124
linux-image-3.2.0-86-virtual 3.2.0-86.124

After a standard system update you need to reboot your computer to make all the necessary changes.

References:
http://www.ubuntu.com/usn/usn-2640-2
http://www.ubuntu.com/usn/usn-2640-1
http://bugs.launchpad.net/bugs/1465998

Package Information:
https://launchpad.net/ubuntu/+source/linux/3.2.0-86.124

Original Source

Url : http://www.ubuntu.com/usn/USN-2640-2

Alert History

If you want to see full details history, please login or register.
0
1
Date Informations
2015-06-23 13:27:37
  • Multiple Updates
2015-06-23 05:25:57
  • First insertion