CVE-2016-4911 Information

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.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Reference

http://www.openwall.com/lists/oss-security/2016/05/17/10 http://www.openwall.com/lists/oss-security/2016/05/17/11 http://www.securityfocus.com/bid/90728 https://bugs.launchpad.net/keystone/+bug/1577558 https://review.openstack.org//c/311886/ https://security.openstack.org/ossa/OSSA-2016-008.html

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

LOW

Base Score

NONE

Base Severity

4.3