CVE-2016-4911
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
02 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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 1.40% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 72.2% of scored records. A rank, not a probability.
- NVD base score
- 4.3 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2016-06-13 14:00Z10 YR AGO
- Last updated
- 2024-08-06 00:46Z2 YR AGO
- Reserved
- 2016-05-17
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-284Improper Access ControlPillar
- Data version
- 5.1
- Document digest
- 471f6192a37edc836bfa5dbd6ea66d18bdd5054f867176aad7a516b9692eb31a
05 Affected products
06 References
- bugs.launchpad.nethttps://bugs.launchpad.net/keystone/+bug/1577558
- www.openwall.com[oss-security] 20160517 CVE request for vulnerability in OpenStack Keystonehttp://www.openwall.com/lists/oss-security/2016/05/17/10
- www.securityfocus.com90728http://www.securityfocus.com/bid/90728
- security.openstack.orghttps://security.openstack.org/ossa/OSSA-2016-008.html
- review.openstack.orghttps://review.openstack.org/#/c/311886/
- www.openwall.com[oss-security] 20160517 Re: CVE request for vulnerability in OpenStack Keystonehttp://www.openwall.com/lists/oss-security/2016/05/17/11
07 Fixed in
Debian 12
- keystone Fixed in 2:9.0.0-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- keystone Fixed in 2:9.0.0-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- keystone Fixed in 2:9.0.0-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.