[USN-1771-1] OpenStack Nova vulnerabilities

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)
Comment: Using GnuPG with undefined - http://www.enigmail.net/

iQIcBAEBCgAGBQJRShxoAAoJEFHb3FjMVZVzwUIP/A0fm1xrkNw+j7T5T3E+IZCt
IRkYk2uyxL/d1A89x4RFfq9+owxSZpjTvLH1tMRoBbxtka/uLIiouDD40yp+zzUx
rE24e/UHhzerNql9YbOoPupd4WaLFXBCIG7T5lf9uCFf5VwNcL2GFgspcxYzjot7
dxrLrkFwoAIphDt1QemxNBHY4IgMigWzsDFD//GeQvdgUWTxMX1Wn1b/Iq9JHxPS
PksTH01AtUW0cI1nRvGlCt8g7jibljXzCalmqqBxEw4M3nuucWrwO58HxhaWOxld
7lbf+nmco9sXw5VEylm+tYoxFQ3q6JPHxPFgeUjMDBZKH67dKgQRXpHLd4p5WZf8
FeLIeq/IX8Tu7GXTYuxW+ASlN0uL4p+Qo+lOgfRZbTc+l7JgPNNvXaIqnGpmQsJ8
nvA3ED8nWlEv4qPlzhBS3imNgwyoJzeniJpCbyU7ZiheJrUVkkrghZG8JKnoU2Rq
hKUxDrRiBxaIa5i7wl9cqib5efoMe68OnYOKDfsPowON9/k0ejbGRgyRMrvdAGZH
wlIuamv1m+4Bd718BCWHUpjzBXn71aqt+woZC+SIXAd5+OEJUvkhuPiJDhK+Jwyx
3e+hlODsU2e1+RfYEx6n2GUiiq5h5/XagJfMbBFuPjvkUhSTwgwKITvCrRQt2Pmj
EqHpoaKaVtxf3jaIT/vi
=UIeA
-----END PGP SIGNATURE-----
==========================================================================
Ubuntu Security Notice USN-1771-1
March 20, 2013

nova vulnerabilities
==========================================================================

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

- Ubuntu 12.10
- Ubuntu 12.04 LTS
- Ubuntu 11.10

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)

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:
http://www.ubuntu.com/usn/usn-1771-1
CVE-2013-0335, CVE-2013-1838

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