Overly broad permissions can turn one compromised account into a much larger security problem. Learn how to reduce unnecessary access, review privileges, and apply least privilege across modern Linux systems. Review Linux Privileges×

Alerts This Week
Warning Icon 1 461
Alerts This Week
Warning Icon 1 461

Ubuntu: USN-2002-1 Critical: Keystone Token Management Access Issue

ubuntu
Calendar Grey October 23, 2013
Scroller Ubuntu
Recent security flaws in Ubuntu's Keystone can lead to unauthorized system access through invalid tokens. Please refer to the update guidelines provided.
Keystone would improperly grant access to invalid tokens under certain circumstances.

Summary

Keystone would improperly grant access to invalid tokens under certain

circumstances.

Software Description:

- keystone: OpenStack identity service

Details:

Chmouel Boudjnah discovered that Keystone did not properly invalidate user

tokens when a tenant was disabled which allowed an authenticated user to

retain access via the token. (CVE-2013-4222)

Kieran Spear discovered that Keystone did not properly verify PKI tokens

when performing revocation when using the memcache and KVS backends. An

authenticated attacker could exploit this to bypass intended access

restrictions. (CVE-2013-4294)

Topics%20covered

Topics Covered

security advisory security issue access control Ubuntu authentication token management keystone

Update Instructions

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

Ubuntu 13.04:
  python-keystone                 1:2013.1.3-0ubuntu1.1

Ubuntu 12.10:
  python-keystone                 2012.2.4-0ubuntu3.2

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-2002-1

CVE-2013-4222, CVE-2013-4294

Severity
critical
Lowest
Low
Medium
High
Critical

=========================================================================Ubuntu Security Notice USN-2002-1

Topics%20covered

Topics Covered

security advisory security issue access control Ubuntu authentication token management keystone

Package Information

https://launchpad.net/ubuntu/+source/keystone/1:2013.1.3-0ubuntu1.1
https://launchpad.net/ubuntu/+source/keystone/2012.2.4-0ubuntu3.2

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.