CVE-2013-2256

OpenStack: Nova private flavors resource limit circumvention

Severity Score

8.1

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

OpenStack Compute (Nova) before 2013.1.3 and Havana before havana-2 does not properly enforce the os-flavor-access:is_public property, which allows remote authenticated users to obtain sensitive information (flavor properties), boot arbitrary flavors, and possibly have other unspecified impacts by guessing the flavor id.

OpenStack Compute (Nova) anterior a 2013.1.3 y Havana anterior havana-2 no fuerza apropiadamente la propiedad "os-flavor-access:is_public" lo que permite a usuarios remotos autenticados obtener información sensible sobre (propiedades flavor) , opciones de arranque y posiblemente otros impactos adivinando el "flavor id"

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. 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. Various other issues were also addressed.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

Partial

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2013-02-19 CVE Reserved
2013-09-04 CVE Published
2024-08-06 CVE Updated
2024-08-06 First Exploit
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-264: Permissions, Privileges, and Access Controls
CWE-862: Missing Authorization

CAPEC

References (5)

URL	Tag	Source

URL	Date	SRC
https://bugs.launchpad.net/nova/+bug/1194093	2024-08-06

URL	Date	SRC
http://seclists.org/oss-sec/2013/q3/281	2023-02-13

URL	Date	SRC
http://rhn.redhat.com/errata/RHSA-2013-1199.html	2023-02-13
https://access.redhat.com/security/cve/CVE-2013-2256	2013-09-03
https://bugzilla.redhat.com/show_bug.cgi?id=993340	2013-09-03

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Openstack Search vendor "Openstack"		Nova Search vendor "Openstack" for product "Nova"				>= 2013.1 < 2013.1.3 Search vendor "Openstack" for product "Nova" and version " >= 2013.1 < 2013.1.3"		-		Affected
Openstack Search vendor "Openstack"		Nova Search vendor "Openstack" for product "Nova"				2013.2 Search vendor "Openstack" for product "Nova" and version "2013.2"		milestone1		Affected