CVE-2016-4911

MEDIUM

Keystone Openstack Identity < 9.0.1 - Improper Access Control

Title source: rule

Description

The Fernet Token Provider in OpenStack Identity (Keystone) 9.0.x before 9.0.1 (mitaka) allows remote authenticated users to prevent revocation of a chain of tokens and bypass intended access restrictions by rescoping a token.

References (6)

[Mailing List] http://www.openwall.com/lists/oss-security/2016/05/17/10

[Mailing List] http://www.openwall.com/lists/oss-security/2016/05/17/11

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/90728

[Vendor Advisory] https://bugs.launchpad.net/keystone/+bug/1577558

[Vendor Advisory] https://review.openstack.org/#/c/311886/

[Patch, Vendor Advisory] https://security.openstack.org/ossa/OSSA-2016-008.html

Scores

CVSS v3 4.3

EPSS 0.0030

EPSS Percentile 53.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Classification

CWE

CWE-284

Status draft

Affected Products (4)

keystone/openstack_identity

pypi/keystone < 9.0.1PyPI

Timeline

Published Jun 13, 2016

Tracked Since Feb 18, 2026