Nova could be made to crash if it received specially crafted network requests.
It was discovered that Nova did not properly enforce the is_public property when determining flavor access. An authenticated attacker could exploit this to obtain sensitive information in private flavors. This issue only affected Ubuntu 12.10 and 13.10. (CVE-2013-2256, CVE-2013-4278)
23 October 2013
A security issue affects these releases of Ubuntu and its derivatives:
Nova could be made to crash if it received specially crafted network requests.
It was discovered that Nova did not properly enforce the is_public property when determining flavor access. An authenticated attacker could exploit this to obtain sensitive information in private flavors. This issue only affected Ubuntu 12.10 and 13.10. (CVE-2013-2256, CVE-2013-4278)
Grant Murphy discovered that Nova would allow XML entity processing. A remote unauthenticated attacker could exploit this using the Nova API to cause a denial of service via resource exhaustion. This issue only affected Ubuntu 13.10. (CVE-2013-4179)
Vishvananda Ishaya discovered that Nova inefficiently handled network security group updates when Nova was configured to use nova-network. An authenticated attacker could exploit this to cause a denial of service. (CVE-2013-4185)
Jaroslav Henner discovered that Nova did not properly handle certain inputs to the instance console when Nova was configured to use Apache Qpid. An authenticated attacker could exploit this to cause a denial of service on the compute node running the instance. By default, Ubuntu uses RabbitMQ instead of Qpid. (CVE-2013-4261)
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.
Vulmon