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CVE-2016-4911

Good to know:

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Date: June 13, 2016

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.

Language: Python

Severity Score

Related Resources (13)

https://github.com/openstack/keystone/commit/ee1dc941042d1f71699971c5c30566af1b348572
http://www.securityfocus.com/bid/90728
https://github.com/openstack/keystone
http://www.openwall.com/lists/oss-security/2016/05/17/10
http://www.openwall.com/lists/oss-security/2016/05/17/11
https://github.com/openstack/keystone/commit/0d376025bae61bf5ee19d992c7f336b99ac69240
https://review.openstack.org/#/c/311886
https://bugs.launchpad.net/keystone/+bug/1577558
https://security.openstack.org/ossa/OSSA-2016-008.html
https://review.openstack.org/#/c/311886/
https://github.com/pypa/advisory-database/tree/main/vulns/keystone/PYSEC-2016-38.yaml
https://nvd.nist.gov/vuln/detail/CVE-2016-4911
https://www.mend.io/vulnerability-database/CVE-2016-4911

Severity Score

Weakness Type (CWE)

Improper Access Control

CWE-284

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): LOW
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): SINGLE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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