Ubuntu 11.10 / 12.04 LTS / 12.10 : nova vulnerabilities (USN-1771-1)

Medium Nessus Plugin ID 65640


The remote Ubuntu host is missing a security-related patch.


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).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Update the affected python-nova package.

Plugin Details

Severity: Medium

ID: 65640

File Name: ubuntu_USN-1771-1.nasl

Version: $Revision: 1.6 $

Type: local

Agent: unix

Published: 2013/03/21

Modified: 2016/05/25

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 6

Temporal Score: 4.4

Vector: CVSS2#AV:N/AC:M/Au:S/C:P/I:P/A:P

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:python-nova, cpe:/o:canonical:ubuntu_linux:11.10, cpe:/o:canonical:ubuntu_linux:12.04:-:lts, cpe:/o:canonical:ubuntu_linux:12.10

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2013/03/20

Reference Information

CVE: CVE-2013-0335, CVE-2013-1838

BID: 58189, 58492

OSVDB: 90657, 91303

USN: 1771-1