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Ubuntu 12.10: 1771-1 Critical: Nova Token Issues and Mitigation

ubuntu
Calendar Grey March 20, 2013
Scroller Ubuntu
Critical security patches have been applied to address OpenStack Nova vulnerabilities in Ubuntu versions 16.04 and 20.04 LTS, ensuring better system protection.
Two security issues were fixed in Nova.

Summary

Two security issues were fixed in Nova.

Software Description:

- nova: OpenStack Compute cloud infrastructure

Details:

Loganathan Parthipan discovered that Nova did not properly validate VNC

tokens after an instance was deleted. An authenticated attacker could

exploit this to access other virtual machines under certain circumstances.

This issue did not affect Ubuntu 11.10. (CVE-2013-0335)

Vish Ishaya discovered that Nova did not always enforce quotas on fixed

IPs. An authenticated attacker could exploit this to cause a denial of

service via resource consumption. Nova will now enforce a quota limit of

10 fixed IPs per instance, which is configurable via 'quota_fixed_ips'

in /etc/nova/nova.conf. (CVE-2013-1838)

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu resource consumption nova token validation

Update Instructions

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

Ubuntu 12.10:
  python-nova
2012.2.1+stable-20121212-a99a802e-0ubuntu1.4

Ubuntu 12.04 LTS:
  python-nova
2012.1.3+stable-20120827-4d2a4afe-0ubuntu1.4

Ubuntu 11.10:
  python-nova                     2011.3-0ubuntu6.13

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

References

https://ubuntu.com/security/notices/USN-1771-1

CVE-2013-0335, CVE-2013-1838

Severity
critical
Lowest
Low
Medium
High
Critical

=========================================================================Ubuntu Security Notice USN-1771-1

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu resource consumption nova token validation

Package Information

https://launchpad.net/ubuntu/+source/nova/2012.2.1+stable-20121212-a99a802e-0ubuntu1.4
https://launchpad.net/ubuntu/+source/nova/2012.1.3+stable-20120827-4d2a4afe-0ubuntu1.4
https://launchpad.net/ubuntu/+source/nova/2011.3-0ubuntu6.13

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