openstack-keystone: Improper check of tampered revocated PKI/PKIZ token
Published Feb 3, 2016
8.6
HIGHCVSS 4.0
EPSS 1.72%
Description
The identity service in OpenStack Identity (Keystone) before 2015.1.3 (Kilo) and 8.0.x before 8.0.2 (Liberty) and keystonemiddleware (formerly python-keystoneclient) before 1.5.4 (Kilo) and Liberty before 2.3.3 does not properly invalidate authorization tokens when using the PKI or PKIZ token providers, which allows remote authenticated users to bypass intended access restrictions and gain access to cloud resources by manipulating byte fields within a revoked token.
Affected products
No data.
Configuration 1
- ≥ 1.5.0 · ≤ 1.5.3
- ≥ 1.6.0 · ≤ 2.3.2
Configuration 2
No data.
Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse)
openstack-keystone
Will not fix
Red Hat Enterprise Linux OpenStack Platform 6 (Juno)
openstack-keystone
Will not fix
Red Hat Enterprise Linux OpenStack Platform 7 (Kilo)
openstack-keystone
Will not fix
Red Hat OpenStack Platform 8 (Liberty)
openstack-keystone
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse) | openstack-keystone | Will not fix | n/a |
| Red Hat Enterprise Linux OpenStack Platform 6 (Juno) | openstack-keystone | Will not fix | n/a |
| Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) | openstack-keystone | Will not fix | n/a |
| Red Hat OpenStack Platform 8 (Liberty) | openstack-keystone | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:S/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.72% (0.01722) | 76.67th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.71% (0.01708) | 74.26th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.85% (0.00849) | 72.76th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.81% (0.02813) | 76.89th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.85% (0.00849) | 73.26th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.21% (0.00209) | 59.82th | v3 (v2023.03.01) |
| Sep 21, 2023 | 0.21% (0.00210) | 58.40th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.20% (0.00196) | 55.67th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.13% (0.01132) | 56.11th | v2 (v2022.01.01) |
| Sep 22, 2022 | 1.13% (0.01132) | 54.59th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.13% (0.01132) | 52.58th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.13% (0.01132) | 30.65th | v2 (v2022.01.01) |
References (15)
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html x_refsource_CONFIRMThird Party Advisory
- http://www.securityfocus.com/bid/80498 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2015-7546 Vendor Advisory
- https://bugs.launchpad.net/keystone/+bug/1490804 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1290774 Issue Tracking
- https://github.com/advisories/GHSA-8c4w-v65p-jvcv Advisory
- https://github.com/openstack/keystone/commit/bff03b5726fe5cac93d44a66715eea49b89c8cb0
- https://github.com/openstack/keystone/commit/d5378f173da14a34ca010271477337879002d6d0
- https://github.com/openstack/keystonemiddleware/commit/96ab58e6863c92575ada57615b19652e502adfd8
- https://github.com/pypa/advisory-database/tree/main/vulns/keystonemiddleware/PYSEC-2016-20.yaml
- https://nvd.nist.gov/vuln/detail/CVE-2015-7546
- https://security.openstack.org/ossa/OSSA-2016-005.html x_refsource_CONFIRMPatchVendor Advisory
- https://web.archive.org/web/20200228002640/http://www.securityfocus.com/bid/80498
- https://wiki.openstack.org/wiki/OSSN/OSSN-0062 x_refsource_CONFIRMVendor Advisory
- https://www.cve.org/CVERecord?id=CVE-2015-7546
Change history (0)
No recorded changes yet.