CVE-2020-12690

openstack-keystone: OAuth1 request token authorize silently ignores roles parameter

Severity Score

8.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue was discovered in OpenStack Keystone before 15.0.1, and 16.0.0. The list of roles provided for an OAuth1 access token is silently ignored. Thus, when an access token is used to request a keystone token, the keystone token contains every role assignment the creator had for the project. This results in the provided keystone token having more role assignments than the creator intended, possibly giving unintended escalated access.

Se detectó un problema en OpenStack Keystone versiones anteriores a 15.0.1 y 16.0.0. La lista de roles proporcionados para un token de acceso OAuth1 es ignorada silenciosamente. Por lo tanto, cuando es usado un token de acceso para solicitar un token de keystone, el token de keystone contiene todas las asignaciones de roles que el creador tenía para el proyecto. Esto resulta en que el token de keystone proporcionado tenga más asignaciones de roles que las previstas por el creador, posiblemente otorgando un acceso escalado no deseado.

A flaw was found in Keystone, where it inadvertently provided OAuth1 access tokens to every role assignment the creator had for a project, resulting in giving more permissions and escalated access in role assignments than intended. The greatest impact is on confidentiality.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-05-06 CVE Reserved
2020-05-06 CVE Published
2024-08-04 CVE Updated
2024-08-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-613: Insufficient Session Expiration
CWE-863: Incorrect Authorization

CAPEC

References (9)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2020/05/07/3	Mailing List
https://lists.apache.org/thread.html/re237267da268c690df5e1c6ea6a38a7fc11617725e8049490f58a6fa%40%3Ccommits.druid.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/re4ffc55cd2f1b55a26e07c83b3c22c3fe4bae6054d000a57fb48d8c2%40%3Ccommits.druid.apache.org%3E	Mailing List
https://www.openwall.com/lists/oss-security/2020/05/06/6	Mailing List

URL	Date	SRC

URL	Date	SRC
https://bugs.launchpad.net/keystone/+bug/1873290	2023-11-07

URL	Date	SRC
https://security.openstack.org/ossa/OSSA-2020-005.html	2023-11-07
https://usn.ubuntu.com/4480-1	2023-11-07
https://access.redhat.com/security/cve/CVE-2020-12690	2020-07-22
https://bugzilla.redhat.com/show_bug.cgi?id=1830395	2020-07-22

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Openstack Search vendor "Openstack"		Keystone Search vendor "Openstack" for product "Keystone"				< 15.0.1 Search vendor "Openstack" for product "Keystone" and version " < 15.0.1"		-		Affected
Openstack Search vendor "Openstack"		Keystone Search vendor "Openstack" for product "Keystone"				16.0.0 Search vendor "Openstack" for product "Keystone" and version "16.0.0"		-		Affected